Author: Oskar Augustus Johannsen

Publisher: Theclassics.Us

Published: 2013-09

Total Pages: 98

ISBN-13: 9781230257921

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ... 1 31. Chironomus pedestris Meigen 1830 Chironomus Meigen. Syst. Beschr. 6:246, 81 1850 Chironomus Zett Dipt. Scand. 9:3537, 58 1864 Chironomus Schiner. Fauna Austr. 2:606 Resembles C. p e d e 11 u s, but the extreme tips of the tibiae are black, the fore femora are entirely black with the exception of the base; and the tips of the knobs of the halteres are black. Length 5.5 to 6 mm. Schiner loc. cit. Green, shining, thorax and tip of abdomen, black; dorsum of thorax of the male with three wide confluent black stripes; antennae of the male pale brown; wings white; tip of the knob of the halteres blackish; legs pale, the extreme tips of the tibiae, the whole of the fore femora except the yellowish bases are black; the anterior tarsi of the male nearly bare, fore metatarsus about one fourth longer than its tibiae; the male claspers short and slender. The first five abdominal segments in the dried specimens are pale yellow. Everything else as with C. p e d e 11 u s Zetterstedt. New Jersey (Johnson). 32. Chironomus nigricans n. sp. (P1.21, figs. 5 to 12, and pl.28, fig.15) Larva. The larvae were collected from the ponds in the vicinity of Cayuga lake, Ithaca, N. Y. They are blood-red, slender, about 12 mm. long, head short, pale brown, edge of the labium and tip of the mandibles black, each eye consisting of a pair of distinctly separated spots, one of these spots being again divided by a fine line. The antennae is slender, about three fourths as long as the mandible, its first joint five sevenths as long as the others taken together (fig.5). The labrum is of the usual form, with about five pairs of curved subapical setae, and a pair of flattened, ventrad-projecting fan-like processes. The epipharynx (fig.10) has a pair of curved, transverse, ..