Volume 1

Insects / by William H. Ashmead [and others].

Date:: [1910]

Catalogue details

Licence: In copyright

Credit: Insects / by William H. Ashmead [and others]. Source: Wellcome Collection.

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Menyanthes, the principal visitors were Eristalis occidenlalis Will., Ncoascia globosa L., and Melanosloma mellinum (L.). At Ncfihrofihyllidium the only insect taken was Melanostoma mellinum (L.), while at Sicversia a number of Muscidae were captured, as well as one species of Syrphidae {Melanostoma trichofihus Thomson). In the spathes of Lysichiton, a beetle {Donacia fcmoralis Kby.) was found at work devouring pollen, and here also occurred the fly, Syr films ribesii L. Sweeping brought to light a number of Diptera hidden in the grass and herbage, including five Tipulidae, of which two were FIG. I. liETLAKATLA. new (Tifiula strigata Coq. and Tifiula gelida Coq.); three species of Empidae, all of which were new {Emfiis fumida Coq., Rhamfihomyia glauca Coq., and Rhamfihomyia anthracodes Coq.); and two species of Dolichopodidae, Dolichofius longi- manus Loew being especially abundant. Of the Muscidae, the most interesting were Orthochceta fiilosa (Zett.), a European species not previously known from America, and (Edofiarca glauca Coq., a new species of Sciomyzidae. With the exception of water beetles, the Coleoptera do not thrive in very marshy places, only six species being found, and these of an uninteresting character, except Stcnus umbratilis Casey, which was new to Alaska, although known from British Columbia. The same may be said of the Heteroptera, since

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