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Two species of Simuliidae (Diptera), Cnephia ornithophilia and Prosimulium vernale, from Maryland

Annals of the Entomological Society of America

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Abstract

The finding of Cnephia ornithophilia Davies, Peterson, & Wood and Prosimulium vernale Shewell for the first time at the Patuxent Wildlife Research Center, Laurel, Maryland, is described. Larvae of C. ornithophilia were collected Nov. 15, pupae Feb. 14, and adult flies Feb. 28. No immature or adult specimens were found between Apr. 2 and Nov. 14. The greatest number of immature stages was found in a 3- to 5-foot-wide stream several hundred feet long, 1-8 inches deep, with a stream flow between 0.49 and 3.30 feet per second. The water temperature varied from 0.5° to 4.0°C, the oxygen content was 10-13 ppm; and the pH varied from 6.9 to 7.4. Larvae of P. vernale were collected Nov. 30 through March, pupae from February through Apr. 1, and adult flies from Feb. 26 through Apr. 1. No immature or adult specimens were found between Apr. 2 and Nov. 29. The largest number of immature stages of P. vernale was found in a 6- to 16-foot-wide stream, 100 feet long, and 1.2 inches deep. The stream flow was between 0.92 and 1.36 feet per second. The water temperature was 0.5°C; pH was 6.7; and oxygen content was 7 ppm.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Two species of Simuliidae (Diptera), Cnephia ornithophilia and Prosimulium vernale, from Maryland
Series title:
Annals of the Entomological Society of America
Volume
63
Issue:
2
Year Published:
1970
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
587-590
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Annals of the Entomological Society of America
First page:
587
Last page:
590
Number of Pages:
4