J.N. Stuht
I.B. Tarshis
1970
<p><span>The finding of </span><i>Cnephia ornithophilia</i><span> Davies, Peterson, & Wood and </span><i>Prosimulium vernale</i><span> Shewell for the first time at the Patuxent Wildlife Research Center, Laurel, Maryland, is described. Larvae of </span><i>C. ornithophilia</i><span> 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 </span><i>p</i><span>H varied from 6.9 to 7.4. Larvae of </span><i>P. vernale</i><span> 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 </span><i>P. vernale</i><span> 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; </span><i>p</i><span>H was 6.7; and oxygen content was 7 ppm.</span></p>
application/pdf
10.1093/aesa/63.2.587
en
Oxford Academic Press
Two species of Simuliidae (Diptera), Cnephia ornithophilia and Prosimulium vernale, from Maryland
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