scholarly journals A NEW PAMPHILA

1885 ◽  
Vol 17 (2) ◽  
pp. 33-34
Author(s):  
G. H. French
Keyword(s):  
Outer Margin ◽  
Lower Half ◽  
Discal Cell ◽  
The Cross ◽  
Cross Vein

Pamphila myus, n. sp.Male.—Expanse .95 of an inch. Upper surface dark olivaceous brown, with a slight vinous reflection, about the same shade as cernes, which it much resembles. The primaries have the discal cell and the area in front of the cell like cernes, heavily washed with yellow of a little darker shade than that species, the same color ectending beyond the cell along the costal area three fourths the distance from the base to the outer margin (as the wings are spread); below the cell the same shade of yellow extends along the median vein the same distance, the area below this to the margin rather heavily sprinkled with yellow scales, except the space beyond the lower half of the stigma. This varies but little from the yellow of cernes. In cernes there is a quadrate sinus of the terminal dark brown of the wing dipping into the yellow beyond the cell, coming up to the cross vein. In this species the sinus is of the same width, but extends inward above the median vein, ending in a point half way to the base of the wing. The stigma is black, narrow, oblique, entire, though constricted below the middle, shorter than in cernes, does not reach the submedian below, and the upper end only reaches the second branch of the median, while in cernes it passes beyond this veinule, the lower third bent a little towards the base, in width not more than half as wide as in cernes; below the stigma an oblong patch of blackish scales that are bronzy in certain lights. Secondaries sprinkled with yellow scales, the inner half with yellowish hairs that are less olivaceous than in cernes.

scholarly journals NEW NORTH AMERICAN TRYPETIDÆ

1894 ◽  
Vol 26 (3) ◽  
pp. 71-75 ◽  
Author(s):  
D. W. Coquillett
Keyword(s):  
Basal Cell ◽  
North American ◽  
Black Spot ◽  
Lower Half ◽  
Single Specimen ◽  
Black Dot ◽  
The Third ◽  
Discal Cell ◽  
Brown Band ◽  
Cross Vein

Trypeta (Acidia) tortile, n. sp., æ. Wholly yellow except a black dot above each wing; ovipositor brown; bristles black; scutellum bearing four bristles; thorax and abdomen shining; ovipositor flat, very borad, nearly as long as the last two abdominal segments. Wings hyaline, the anal cell, bases of marginal, sub-marginal, and of the final basal cell, also the apex of the second basal cell, yellow; a black spot on furcation of the second and thrid veins, and one on lower half of vein at apex of anal cell; a brown band commences on cossta between apices of auxiliary and of first vein, and extends to the discal cell, going over the small cross-vein and continuing as a yellowish streak into the discal cell; a second brown band commences on the costa between apices of the first and second veins, and crosses the wing, passing over the posterior crossvein, and near its terminus sending a spur into the third posterior cell; apex of wing from slightly before apex of the second vein to beyond tip of fourth vein, brown; first and third veins bristly. Length, 5 mm. Washington (O. B. Johnson). A single specimen.

scholarly journals NOTE ON THE STRUCTURE OF NEPHOPTERYX ZIMMERMANI

1878 ◽  
Vol 10 (1) ◽  
pp. 19-19 ◽  
Author(s):  
A. R. Grote
Keyword(s):  
Transverse Ridge ◽  
The Third ◽  
Continuous Scale ◽  
The Cross ◽  
Cross Vein

The following note on the structure of Zimmermani is taken from a MS. paper on the N. Am. Phycidæ which I am preparing for publication. I would be glad of more material in this group from any correspondents.“Pinipestis (sub-gen. nov.).Maxillary palpi alike in both sexes, concealed by the porrect labial palpi, which have the third article erect and exceed the front. Ocelli present. Male antennæ very slightly bent at base, where they show slight continuous scale-tufts ; ciliate beneath. Fore wings with veins 4 and 5 running close together at base; these veins are seen to have a separate origin, 5 on the cross-vein close to 4, divaricating at one-third from base. Hind wings 8-veined ; vein 5 running close to 4 at base, but separate and continuous with the discal cross-vein. Head behind with a thick transverse ridge of scales; clypeus with a bunchlike projection of scales centrally.”

scholarly journals Crossveinless 2 contains cysteine-rich domains and is required for high levels of BMP-like activity during the formation of the cross veins in Drosophila

Development ◽  
2000 ◽  
Vol 127 (18) ◽  
pp. 3947-3959 ◽  
Author(s):  
C.A. Conley ◽  
R. Silburn ◽  
M.A. Singer ◽  
A. Ralston ◽  
D. Rohwer-Nutter ◽  
...  
Keyword(s):  
Signaling Pathway ◽  
Von Willebrand Factor ◽  
Secretory Pathway ◽  
Drosophila Wing ◽  
Transmembrane Sequence ◽  
The Cross ◽  
Von Willebrand ◽  
Willebrand Factor ◽  
Early Phases ◽  
Cross Vein

The BMP-like signaling mediated by the ligands Dpp and Gbb is required to reinforce the development of most veins in the Drosophila wing. However, the formation of the cross veins is especially sensitive to reductions in BMP-like signaling. We show here that the formation of the definitive cross veins occurs after the initial specification of the longitudinal veins in a process that requires localized BMP-like activity. Since Dpp and Gbb levels are not detectably higher in the early phases of cross vein development, other factors apparently account for this localized activity. Our evidence suggests that the product of the crossveinless 2 gene is a novel member of the BMP-like signaling pathway required to potentiate Gbb of Dpp signaling in the cross veins. crossveinless 2 is expressed at higher levels in the developing cross veins and is necessary for local BMP-like activity. The Crossveinless 2 protein contains a putative signal or transmembrane sequence, and a partial Von Willebrand Factor D domain similar to those known to regulate the formation of intramolecular and intermolecular bonds. It also contains five cysteine-rich domains, similar to the cysteine-rich domains found in Chordin, Short Gastrulation and Procollagen that are known to bind BMP-like ligands. These features strongly suggest that Crossveinless 2 acts extracelluarly or in the secretory pathway to directly potentiate Dpp or Gbb signaling.

scholarly journals NOTE ON THE DIURNALS

1898 ◽  
Vol 30 (8) ◽  
pp. 201-203
Author(s):  
A. Radcliffe Grote
Keyword(s):  
Common Species ◽  
Hawk Moth ◽  
The Media ◽  
The Cross ◽  
Parallel Case ◽  
The Individual ◽  
Cross Vein

Mancipium brassicœ.—Dr. Chapman writes me that certain specimens of this common species examined by him showed the very short veinlet III. 3+4. This veinlef constantly diminishes in size, progressing towards the tip of the wing to finally vanish, through many forms fo the Pieridœ. I had indeed expected it to be occasionally prersistent in brassicœ, although my preparations did not show it. It has disappeared in Pontia daplidice, in Nathalis iole, and strange to say in that curious and now isolated Pierid, Gonophlebia paradoxa. This variability, in one and the same species, is interesting because it follows the general evolutionary direction of the changes in the venation. Always the radial branches in the Pierids and other groups tend to diminish in number. Always the disintegration of the Media advances, until it finally disappears, as a system, from the surface of the wing (Rothschildia, Samia, Potamis, etc.). A parallel case to that of brassicœ is offered by Copismerinthus ocellata. In some specimens of this Hawk Moth, vein IV, is still thrown off from the cross vein of the hind wings, instead fo the Radius, which it has usually ascended to beyond the cell. We must regard these as instances of generalization in the individual, of a reversion to what was formerly the rule and is now becoming, by slow degrees, the exception.

scholarly journals NEW GENERA AND SPECIES OF N. A. FULGORIDÆ

1902 ◽  
Vol 34 (10) ◽  
pp. 259-266 ◽  
Author(s):  
E. D. Ball
Keyword(s):  
New Genera ◽  
The Cross ◽  
General Appearance ◽  
Cross Vein

Anotia Kirkaldayin.sp.– Form and general appearance of Amalopota Fitchi, but broader and less definitely marked. Form of A. Burnetii, but with a sharp head and blunter elytra. Length, including elytra, 6.5 mm.Vertex slightly broader than in Burnetii, inclined upward, nearly flat, not rounding over at apex as in that species; elytra broader toward apices than in Burnetii; venation very similar, but with the median nervure not forked beyond the cross-vein, and the first branch of the postcostal nervure coming off close tot he cross-vein and at nearly right angles to the nervure. Costal appendix larger than in Burnetii, obliquely truncate posteriorly.

scholarly journals A New Pipunculid Parasitic on Leaf-hoppers in India

1922 ◽  
Vol 12 (4) ◽  
pp. 469-469
Author(s):  
E. Brunetti
Keyword(s):  
Lower Half ◽  
Pale Yellow ◽  
Discal Cell ◽  
Apical Half

Head.—Eyes dark red; vertical triangle black, frons dull black, lower part with a somewhat quadrate greyish dust spot; face dull black, lower half appearing grey when viewed from above. Antennae dull yellowish, third joint distinctly pointed, moderately long and almost sub-triangular. Occiput moderately produced behind eye margins, black, with a little grey dust. Thorax moderately shining black, middle of dorsum with yellowish brown dust and a little pale pubescence; pleurae blackish, with some greyish dust. Abdomen shining black; a very little yellowish pubescence towards sides: genitalia with a yellowish tinge. Legs mainly yellow; coxae black, also a broad median band on femora (possibly incomplete in some individuals); tarsi darker towards tips; all femora with a row of very small bristles on about apical half of underside. Wings clear; stigma very pale yellow; anterior crossvein at about two-fifths of the discal cell; halteres yellowish. Length, 2·5–3·5 mm.

scholarly journals New extinct ant genus (Hymenoptera, Formicidae, Myrmicinae) from late Eocene Rovno amber

2021 ◽  
Vol 84 ◽  
pp. 271-282
Author(s):  
Alexander G. Radchenko ◽  
Maxim Yu. Proshchalykin
Keyword(s):  
Late Eocene ◽  
Morphological Features ◽  
Taxonomic Position ◽  
Rovno Amber ◽  
The Cross ◽  
Cross Vein

A new fossil myrmicine ant genus and species Lelejus venustusgen. et sp. nov., are described from late Eocene Rovno amber (Priabonian, 33.9–37.8 Ma). This genus differs from all extant and extinct Myrmicinae genera known from the late Eocene European ambers in the combination of morphological features, in particular: 13-segmented antennae with a very short scape and filiform funiculus; 3-segmented maxillary and 2-segmented labial palps; well-developed mandibles with dentate masticatory margin; scutum with broad notauli; forewings with closed cells 1+2r, 3r and mcu, the cell 3r of approximately the same length as cell 1+2r; free vein M branches off from RS approximately at the midlength between the junction of cross-vein 2r-rs with RS and vein m-cu; the cross-vein cu-a is located far from the base of wing, so the branch 1M+Cu is much longer than 2M+Cu. The taxonomic position of the described genus is discussed.

A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

1973 ◽  
Vol 31 ◽  
pp. 698-699
Author(s):  
V. Mizuhira ◽  
Y. Futaesaku
Keyword(s):  
Cross Section ◽  
Tannic Acid ◽  
Elastic Fiber ◽  
The Other ◽  
New Approach ◽  
Tissue Block ◽  
Active Reaction ◽  
The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

Structures Resembling Striated Rootlets in Oocytes

1972 ◽  
Vol 30 ◽  
pp. 124-125
Author(s):  
Valerie V. Ernst
Keyword(s):  
Golgi Complex ◽  
Fibrous Structure ◽  
Oocyte Development ◽  
The Cross

During the earliest stage of oocyte development in the limpet, Acmea scutum, Golgi complexes are small, few and randomly dispersed in the cytoplasm. As growth proceeds, the Golgi complexes increase in size and number and migrate to the periphery of the cell. At this time, fibrous structures resembling striated rootlets occur associated with the Golgi complexes. Only one fibrous structure appears to be associated with a Golgi complex.The fibers are periodically cross banded with an average of 4 dense fibrils and 6 lighter fibrils per period (Fig. 1). The cross fibrils have a center to center spacing of about 7 run which appears to be the same as that of the striated rootlets of the gill cilia in this animal.

Energy Distribution in Electron Beams

1972 ◽  
Vol 30 ◽  
pp. 568-569
Author(s):  
Tamotsu Ohno
Keyword(s):  
Electron Beam ◽  
Energy Distribution ◽  
Cross Section ◽  
Integral Curve ◽  
Electron Beams ◽  
Electron Gun ◽  
Angular Divergence ◽  
Apparent Increase ◽  
Integral Width ◽  
The Cross

The energy distribution in an electron; beam from an electron gun provided with a biased Wehnelt cylinder was measured by a retarding potential analyser. All the measurements were carried out with a beam of small angular divergence (<3xl0-4 rad) to eliminate the apparent increase of energy width as pointed out by Ichinokawa.The cross section of the beam from a gun with a tungsten hairpin cathode varies as shown in Fig.1a with the bias voltage Vg. The central part of the beam was analysed. An example of the integral curve as well as the energy spectrum is shown in Fig.2. The integral width of the spectrum ΔEi varies with Vg as shown in Fig.1b The width ΔEi is smaller than the Maxwellian width near the cut-off. As |Vg| is decreased, ΔEi increases beyond the Maxwellian width, reaches a maximum and then decreases. Note that the cross section of the beam enlarges with decreasing |Vg|.

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