. Annual report. New York State Museum; Science -- New York (State); Plants -- New York (State); Animals -- New York (State). MAY FLIES AND MIDGES OF NEW YORK 31 Legs rather short, nearly bare; femora scarcely flattened, but somewhat concave on the side applied to the body; pale brownish, paler at the sutures. Wing cases reaching posteriorly as far as the apex of the 3d abdominal segmient. Abdomen very slightly dej^ressed, regularly tapering posteriorly, its segments very slightly increasing in length to the 9th, the 10th a little shorter on the dorsum, where produced backward in a rounded lob
. Annual report. New York State Museum; Science -- New York (State); Plants -- New York (State); Animals -- New York (State). MAY FLIES AND MIDGES OF NEW YORK 31 Legs rather short, nearly bare; femora scarcely flattened, but somewhat concave on the side applied to the body; pale brownish, paler at the sutures. Wing cases reaching posteriorly as far as the apex of the 3d abdominal segmient. Abdomen very slightly dej^ressed, regularly tapering posteriorly, its segments very slightly increasing in length to the 9th, the 10th a little shorter on the dorsum, where produced backward in a rounded lobe, one half shorter at the sides; short lateral spines on segments 8 and 9, larger on 9, the lateral angles of the pre- ceding segments obtuse. Gills present on segments 1-7, double, similar, or slightly longer on the middle segments, divided in nine tenths of their length into two long, slender, simple tapering filaments, pig- mented with purplish along the tracheae. iSetae 3, equal, nearly bare at base and sparingly whorled with spinules .beyond, grad- ually tapering to long slender tij)s. General color olivaceous, paler below, with a very narrow median pale line on head and prothorax, a median row of pale spots on the abdomen of the female becoming larger posteriorly, and a pair of spots either side on segments 3-9, becoming confluent with the median one on 9; male darker and more uniformly brown. May 8, 27, 30, 31; June 13, 14, 18. Heptageninae I deem it necessary to state that I have scarcely entered into the study of this interesting and difficult complex of interrelated forms, having dealt at first hand only with those species in whose life his tories I have become interested. The foregoing keys for this group of genera are based largely on characters culled from Eaton's Monograph, and these are but a few of the many characters therein given, and the value of these few as absolute distinctions of closely allied genera. I have not personally tested. This group should furn
Size: 1527px × 1636px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookauthornewyorkstatemuseum, booksubjectnewyorkstatemuseum
