MAY FLIES AND MIDGES OP NEW YORK 219 



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 1 1 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; dorsmn of 

 thorax of the male with three wide confluent black stripes; an- 

 tennae 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 1 1 u s Zetter- 

 stedt. 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. Thev are blood-red, slender, about 



/ Cj 



12 mm. long, head short, pale brown, edge of the labium and 

 tip of the mandibles black, each eye consisting of a pair of dis- 

 tinctly 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, toothed 

 ridges, a transverse comb (c) composed of five leaf-like parts, 

 each part with four or five pointed lobes. The lateral arms, not 

 shown in the figure, are of the usual form, each having a bilobed 

 extremity, the outer lobe being slender and pointed, the inner 

 one shorter and broader. The three pairs of pectinate setae 

 which are placed within the horseshoe-shaped ridge are con- 

 spicuous (fig.10). The mandibles are stout, with black apices, 

 the usual subapiral hairs, mesad projecting branched setae, and 

 a pair of slender lateral projecting setae (fig.7). The maxilla 

 has a moderately stout palpus with a slender apical seta, several 

 stout pale setae, some fine hairs near its base, several mesad 

 projecting pointed lobes, and a number of scattered papillae 



