DESCRIPTION OF A NEW HADENA FROM THE WHITE MOUNTAINS

1875 ◽  
Vol 7 (10) ◽  
pp. 198-198 ◽  
Author(s):  
H. K. Morrison
Keyword(s):  
Black Line ◽  
White Mountains ◽  
The Third

Eyes naked, with short lashes. Antennæ in the female simple. Palpi gray, the third joint very short. Collar whitish beneath, above bearing a transverse, partially interrupted black line. Thorax mingled light and dark gray; no prothoracic tuft, metathoracic tuft low and longitudinally furrowed; sides of the thorax deep black and very conspicuous. Abdomen light gray, with several slight dorsal black tufts, and one very strong one, tipped with white on the third segment.

LIFE CYCLE OF THE NYMPH FLY PALAEODIPTERON WALKERI IDE 1965 (DIPTERA: NYMPHOMYIIDAE) IN THE WHITE MOUNTAINS OF SOUTHERN QUÉBEC

1989 ◽  
Vol 121 (7) ◽  
pp. 603-607 ◽  
Author(s):  
P.P. Harper ◽  
Michel Lauzon
Keyword(s):  
Life Cycle ◽  
Larval Stage ◽  
White Mountains ◽  
Larval Instars ◽  
The Third ◽  
Summer Generation

AbstractCollections of larvae over 1 year in the River Clinton in the White Mountains of southern Québec indicated that Palaeodipteron walkeri Ide is bivoltine and that there are five larval instars. In April, larvae were in their fourth and fifth instars. Adults emerging in May and June gave rise to a summer generation in which most individuals emerged in August and September. The offspring of these adults, together with stragglers from the summer generation, formed an overwintering generation. Overwintering was completed in the larval stage, mainly the third and fourth instars. There was some growth in winter and development increased in the spring. Our data were compared with previously published observations; although no discrepancy occurred, our interpretation was different. Previous schemes proposed for the life cycle in this species were based on few specimens and lacked winter observations.

A New Laspeyresia Species on Red Pine

1962 ◽  
Vol 94 (12) ◽  
pp. 1272-1273 ◽  
Author(s):  
T. N. Freeman
Keyword(s):  
New Species ◽  
Hind Wing ◽  
Outer Margin ◽  
Red Pine ◽  
Pine Plantations ◽  
Forest Insect ◽  
Black Line ◽  
The Third ◽  
Basal Half ◽  
Outer Half

During his study of the ecology of red pine plantations, Mr. J. L. Martin, Forest Insect Laboratory, Sault Ste. Marie, Ontario, found a species of Laspeyresia feeding as larvae under the bark of living trees. This species is described here to enable him to report on the results of his investigation.Laspeyresia resinosae, new speciesAntenna, head, thorax, and abdomen powdery-grey. Basal half of forewing grey; outer half blackish, with cupreous reflections, the tips of the scales ochreous; outer three-fifths of costa with four pairs of silvery-white geminations; the basal pair of geminations fuse into a single, angular, transverse, shiny-leaden fascia, that extends to the trailing margin just beyond the middle; a similar fascia arises from the second costal geminations, and extends only to the fold; a third leaden fascia arises from the apical geminations, extends irregularly to the tornus, and is broken into three almost equal sections; the central portions of the second and third fasciae are narrowly margined with a few black scales, representing a very poorly defined ocelloid patch; outer margin with a very distinct black line basad to the shiny leaden fringe; the black line cut by three white dashes, two opposite the breaks in the outer, transverse fascia, and the third at the tornal end of that fascia. Hind wing powdery-grey; fringe dirty-white with darker basal line. Under-surface and legs silvery-grey. Tarsi black banded. Wingspread: 9.5-10.5 mm. Moth in late June and early July.

Saddled Prominent Outbreaks in North America

1988 ◽  
Vol 5 (2) ◽  
pp. 88-91 ◽  
Author(s):  
Peter J. Martinat ◽  
Douglas C. Allen
Keyword(s):  
New York ◽  
North America ◽  
New England ◽  
Sugar Maple ◽  
Eastern North America ◽  
American Beech ◽  
White Mountains ◽  
The Third ◽  
Historical Pattern ◽  
Mountain Systems

Abstract Saddled prominent has caused severe defoliation in eastern North America at 10-13 year intervals since 1907. Outbreaks consisted of simultaneous infestations in physiographically separated New England mountain systems: the Taconic, Berkshire, Green, and White Mountains. In more extensive outbreaks, concurrent infestations occurred within a 2-3 year period in New England, New York, Pennsylvania, Ontario, Quebec, the Canadian Maritimes, Michigan, and Wisconsin. However, outbreaks were most frequent and persistent in New England, where defoliation first appeared on ridges or upper slopes, and American beech and sugar maple composed at least 60% of the forest. In subsequent years, defoliation persisted in these epicenters (outbreak foci) and spread to stands at lower elevations. General population collapse usually occurred during the third or fourth summer following initial defoliation. Based solely on the historical pattern of infestations, outbreaks are predictable if at all, in the Green and White Mountains in New England. North. J. Appl. For. 5:88-91, June 1988.

NEW TABANIDÆ

1883 ◽  
Vol 15 (6) ◽  
pp. 110-112 ◽  
Author(s):  
John Marten
Keyword(s):  
Dark Spot ◽  
Black Line ◽  
Black Triangle ◽  
The Third ◽  
Golden Yellow ◽  
Outer Half

Tabanus Allynii. Length 15 mm.Female.—Eyes naked, no ocelligerous tubercle. Front yellowishgray; callosity chestnut, nearly square, with an unconnected, spindleshaped line above. Face and cheeks yellowish-gray. Antennæ reddishyellow, annulate portion black. Palpi yellowish with white hairs. Thorax and scutellum grayish-black with minute golden-yellow pubescence; humerus reddish-brown when denuded; pleurae and pectus grayish with white or yellow hairs. Abdomen yellow, segments 4–7 black with yellow hind margins, which are expanded into triangles on the middle of segments 4 and 5; first segment black under the scutellum; second segment with a black triangle on the middle, and the third segment with a dark spot on each side of the middle. Venter yellow with a black line through the middle and tip dark. Legs—femora balck, yellow at the tips; tibiae yellow, darker at the tips; outer half of front tibia black; tarsi brownish, front ones black. Wings hyaline; stigma yellowish.

Progress report on 21-cm observations at low latitude between longitudes (l 11) 0° and 66°

1967 ◽  
Vol 31 ◽  
pp. 177-179
Author(s):  
W. W. Shane
Keyword(s):  
Preliminary Report ◽  
Progress Report ◽  
Galactic Centre ◽  
Low Latitude ◽  
The Third ◽  
Introductory Lecture ◽  
Centre Region

In the course of several 21-cm observing programmes being carried out by the Leiden Observatory with the 25-meter telescope at Dwingeloo, a fairly complete, though inhomogeneous, survey of the regionl11= 0° to 66° at low galactic latitudes is becoming available. The essential data on this survey are presented in Table 1. Oort (1967) has given a preliminary report on the first and third investigations. The third is discussed briefly by Kerr in his introductory lecture on the galactic centre region (Paper 42). Burton (1966) has published provisional results of the fifth investigation, and I have discussed the sixth in Paper 19. All of the observations listed in the table have been completed, but we plan to extend investigation 3 to a much finer grid of positions.

The orbit of Pluto over a long interval of time

1966 ◽  
Vol 25 ◽  
pp. 227-229 ◽  
Author(s):  
D. Brouwer
Keyword(s):  
Periodic Orbit ◽  
Numerical Integration ◽  
Restricted Problem ◽  
Three Dimensional ◽  
The Third ◽  
Circular Restricted Problem ◽  
Resonance Relation

The paper presents a summary of the results obtained by C. J. Cohen and E. C. Hubbard, who established by numerical integration that a resonance relation exists between the orbits of Neptune and Pluto. The problem may be explored further by approximating the motion of Pluto by that of a particle with negligible mass in the three-dimensional (circular) restricted problem. The mass of Pluto and the eccentricity of Neptune's orbit are ignored in this approximation. Significant features of the problem appear to be the presence of two critical arguments and the possibility that the orbit may be related to a periodic orbit of the third kind.

Monte Carlo Algorithms for Moments of Transition Arrays

1988 ◽  
Vol 102 ◽  
pp. 79-81
Author(s):  
A. Goldberg ◽  
S.D. Bloom
Keyword(s):  
Monte Carlo ◽  
State Vector ◽  
Basis Vector ◽  
Collective State ◽  
Dispersion Characteristics ◽  
Dipole Strength ◽  
The Third ◽  
Monte Carlo Algorithms ◽  
Third Moment ◽  
Very High

AbstractClosed expressions for the first, second, and (in some cases) the third moment of atomic transition arrays now exist. Recently a method has been developed for getting to very high moments (up to the 12th and beyond) in cases where a “collective” state-vector (i.e. a state-vector containing the entire electric dipole strength) can be created from each eigenstate in the parent configuration. Both of these approaches give exact results. Herein we describe astatistical(or Monte Carlo) approach which requires onlyonerepresentative state-vector |RV> for the entire parent manifold to get estimates of transition moments of high order. The representation is achieved through the random amplitudes associated with each basis vector making up |RV>. This also gives rise to the dispersion characterizing the method, which has been applied to a system (in the M shell) with≈250,000 lines where we have calculated up to the 5th moment. It turns out that the dispersion in the moments decreases with the size of the manifold, making its application to very big systems statistically advantageous. A discussion of the method and these dispersion characteristics will be presented.

Probe size and 5th-order aberration

1987 ◽  
Vol 45 ◽  
pp. 134-135 ◽  
Author(s):  
Zhifeng Shao
Keyword(s):  
Electron Probe ◽  
Spherical Aberration ◽  
Wave Length ◽  
Cylindrical Symmetry ◽  
Electron Wave ◽  
Third Order ◽  
The Third ◽  
Probe Radius ◽  
Small Probe ◽  
Probe Size

A small electron probe has many applications in many fields and in the case of the STEM, the probe size essentially determines the ultimate resolution. However, there are many difficulties in obtaining a very small probe.Spherical aberration is one of them and all existing probe forming systems have non-zero spherical aberration. The ultimate probe radius is given byδ = 0.43Csl/4ƛ3/4where ƛ is the electron wave length and it is apparent that δ decreases only slowly with decreasing Cs. Scherzer pointed out that the third order aberration coefficient always has the same sign regardless of the field distribution, provided only that the fields have cylindrical symmetry, are independent of time and no space charge is present. To overcome this problem, he proposed a corrector consisting of octupoles and quadrupoles.

The effects of Cyclosporin-A (CYA) on the Ultrastructure of Gingival Mast Cells (GMC) in Behcet's disease (BD)

1990 ◽  
Vol 48 (3) ◽  
pp. 358-359
Author(s):  
Oktay Arda ◽  
Ulkü Noyan ◽  
Selgçk Yilmaz ◽  
Mustafa Taşyürekli ◽  
İsmail Seçkin ◽  
...  
Keyword(s):  
Unknown Etiology ◽  
Control Group ◽  
Target Cells ◽  
Gingival Hyperplasia ◽  
Cellular Activity ◽  
Direct Relation ◽  
Immune Disease ◽  
Genital Ulceration ◽  
Functional Changes ◽  
The Third

Turkish dermatologist, H. Beheet described the disease as recurrent triad of iritis, oral aphthous lesions and genital ulceration. Auto immune disease is the recent focus on the unknown etiology which is still being discussed. Among the other immunosupressive drugs, CyA included in it's treatment newly. One of the important side effects of this drug is gingival hyperplasia which has a direct relation with the presence of teeth and periodontal tissue. We are interested in the ultrastructure of immunocompetent target cells that were affected by CyA in BD.Three groups arranged in each having 5 patients with BD. Control group was the first and didn’t have CyA treatment. Patients who had CyA, but didn’t show gingival hyperplasia assembled the second group. The ones displaying gingival hyperplasia following CyA therapy formed the third group. GMC of control group and their granules are shown in FIG. 1,2,3. GMC of the second group presented initiation of supplementary cellular activity and possible maturing functional changes with the signs of increased number of mitochondria and accumulation of numerous dense cored granules next to few normal ones, FIG. 4,5,6.

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