scholarly journals SOME MAINE SPECIES OF HALICTUS

1905 ◽  
Vol 37 (8) ◽  
pp. 299-300 ◽  
Author(s):  
John. H. Lovell
Keyword(s):  
British Museum ◽  
Common Species ◽  
Sagittaria Latifolia ◽  
Cornus Canadensis

This paper continues the enumeration of the species of Halictus found in Maine, begun in the Canadian Entomologist for February, 1905, page 40.Halictus similis, Smith, ♀ ♂.— A very common species in this locality, taken from June 19th to August 24th. It visits a great variety of flowers, as the blackberry, Iris versicolor, Sagittaria latifolia, Aralia hispida, Cornus Canadensis, and teh thistles and goldenrods. Professor Cockerell, who has examined Smith's type in the British Museum, states that the Maine specimens agree with it in all the more important characters.

Understory species interactions in mature boreal mixedwood forests

Botany ◽  
2010 ◽  
Vol 88 (10) ◽  
pp. 912-922 ◽  
Author(s):  
Virginia Chávez ◽  
S. Ellen Macdonald
Keyword(s):  
Environmental Factors ◽  
Species Interactions ◽  
Common Species ◽  
Herbaceous Layer ◽  
Competition Intensity ◽  
Understory Species ◽  
Mixedwood Forests ◽  
Natural Logarithm ◽  
Cornus Canadensis ◽  
Herb Species

We explored interactions among plant growth forms in the understory of mature boreal mixedwood forests in western Canada by investigating the competitive influence of erect shrubs on herbs (forbs and grasses). We established 10 pairs of plots; all erect shrubs were removed in one plot of each pair (removals) and left intact in the other plot (controls). Two years later, we harvested all aboveground biomass of the herbaceous layer (herb biomass: this included graminoids, forbs, trailing shrubs, and species with a woody base but not woody stems) from the 20 plots. We tested for significant differences in understory species biomass and composition between control and removal plots and examined the influence of 25 environmental factors on species composition of the herbaceous layer. Competition intensity was measured by the natural logarithm of response ratio (ln RR) index based on herb biomass. After erect shrub removal, there was a significant increase in herb biomass, mostly due to an increase of the most common species (e.g., Cornus canadensis Linnaeus, Linnaea borealis Linnaeus). The values of competition intensity (ln RR) varied among herb species but were, overall, positive, indicating a release from competition following shrub removal. Composition of the herbaceous layer was significantly different between removal and control plots and was also significantly related to seven environmental factors, which explained 40% of the variation in composition. Our study suggests that there is asymmetric competition for light between erect shrub and herb species in boreal ecosystems.

Notes on the Calliphorinae. Part I. The Oriental Species

1922 ◽  
Vol 13 (1) ◽  
pp. 109-113 ◽  
Author(s):  
W. S. Patton
Keyword(s):  
Medical Research ◽  
British Museum ◽  
Common Species ◽  
The Other ◽  
Indian Species ◽  
Old World ◽  
Indian Journal ◽  
The World ◽  
The Common ◽  
Living Tissues

For many years I have collected and bred the Indian Calliphorinae, and recently contributed a number of papers describing the common species. In the first of these, which appeared in a recent number of the Indian Journal of Medical Research (viii, no. 1, July 1920), I described in some detail the egg, larva, puparium and adults of Chrysomyia bezziana, Villeneuve, the Old World screw-worm fly, and pointed out that this species is a specific myiasis-producing Calliphorine, only breeding in living tissues, and that its larvae may be found in all forms of cutaneous, subcutaneous, nasal, oral, aural and vaginal myiasis in man and animals. In the succeeding papers I described the larvae, puparia and adults of the other common species, two of which, Chrysomyia megacephala and Lucilia argyricephala, occasionally cause myiasis in animals in India. It was not possible at the time to determine the non-myiasis-producing species, and new names were given them. But recently, when studying the species of Musca in the National Collection at the British Museum, I was able to examine Walker's types and am now in a position to give these Indian species their correct names. At the same time I have examined all the Calliphorine material in the National Collection from other parts of the world, as well as many specimens in my own collection, and I propose in this and in succeeding notes to collect together all the results of my studies with a view to revising later the species of blow-flies. Here again I am deeply indebted to Major E. E. Austen, D.S.O., for the valuable help he has given me in this work.

scholarly journals A Remarkable Mosquito, Opifex fuscus, Hutton

1922 ◽  
Vol 13 (1) ◽  
pp. 115-126 ◽  
Author(s):  
David Miller
Keyword(s):  
New Zealand ◽  
British Museum ◽  
High Water ◽  
Common Species ◽  
Short Account ◽  
Coast Line ◽  
The North ◽  
High Water Mark ◽  
Island Coast

When carrying out an investigation into the mosquitos of New Zealand, * the writer found that a very common species bred in saline and semi-saline pools above high water mark along the rocky parts of the North Island coast line. For some time it was considered that this mosquito was unrecorded, but it appears that Hutton described it as a Tipulid under the name Opifex fuscus.† This was pointed out to me both by Mr. G. V. Hudson, of Wellington, who is in possession of Hutton’s Tipulid types and had seen the illustrations here reproduced, and later on by Mr. F. W. Edwards, of the British Museum, who published a short account of the insect from material recently sent to him by Mr. Hudson.‡

The fate of the bird specimens from Cook's voyages possessed by Sir Joseph Banks

2009 ◽  
Vol 36 (2) ◽  
pp. 231-243 ◽  
Author(s):  
David G. Medway
Keyword(s):  
Royal College ◽  
British Museum ◽  
John Hunter ◽  
The World ◽  
Extensive Collection

Joseph Banks possessed the greater part of the zoological specimens collected on James Cook's three voyages round the world (1768–1780). In early 1792, Banks divided his zoological collection between John Hunter and the British Museum. It is probable that those donations together comprised most of the zoological specimens then in the possession of Banks, including such bird specimens as remained of those that had been collected by himself and Daniel Solander on Cook's first voyage, and those that had been presented to him from Cook's second and third voyages. The bird specimens included in the Banks donations of 1792 became part of a series of transactions during the succeeding 53 years which involved the British Museum, the Royal College of Surgeons of England, and William Bullock. It is a great pity that, of the extensive collection of bird specimens from Cook's voyages once possessed by Banks, only two are known with any certainty to survive.

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