MAY FLIES AND MIDGES OF NEW YORK 257 



epipharynx with several pairs of rather stout curved spines, 

 besides several small setae; the lateral arms stout, with black 

 apices. The mandibles wholly black, with the lateral surface 

 faintly wrinkled, apical tooth long and slender. Antennae and 

 labruin as with . e x i 1 i s and Onthocladius fugax 

 (see pl.25, fig.3). The labium and maxillae as shown on pl.25, 

 fig.22. Each eye consists of two spots nearly in contact, the 

 anterior spot much smaller than the posterior. Setae of the 

 anterior prolegs are coarse, curved, but apparently not pectinate. 

 Posterior appendages resembling those shown on pl.25, fig.6. 



Pupa. Colors yellow and black. Length about 5 mm. Respira- 

 tory organ not discovered in the single specimen in my possession. 

 Dorsuni of abdominal segments uniformly covered with minute 

 spines. Anal appendage like that of C. e x i 1 i s. 



Imago, male. (P1.29, fig.18.) Head and its members black, 

 hairs of antennae gray; thorax black, mesouotum highly polished; 

 metanotum and scutelluin opaque, velvet black ; abdomen velvet 

 black, the first two segments and the hind margins of the following- 

 two polished yellow; genitalia yellow; femora black, the extreme 

 bases and trochanters yellow, front tibiae and tarsi brown, the 

 former with a broad median white band, other tibiae and tarsi 

 yellow, their apices brownish, legs only pubescent, first joint of 

 front tarsi two thirds as long as the tibiae; wings whitish hyaline; 

 small crossvein slightly darker than the adjacent veins, K 4+ - 

 almost straight; halteres yellow; length 2.5 mm. Great Falls, 

 Md. Coquillet, loc. cit. 



Female. Like the male excepting for sexual characters. The 

 white band on the fore tibiae is nearer the base than the tip, so 

 that the black at the basal articulation is much less than at the 

 apical end. The yellow margins of the third and fourth abdominal 

 segments are quite narrow, and nearly wanting in some specimens. 

 The thorax of the female is more brownish, polished, with pleura 

 and humeri paler, sometimes yellowish. Male and female from 

 Saranac Inn, N. Y., Ithaca, N. Y., Washington State. 



7. Cricotopus sylvestris Fabricius 



1794 T i p u 1 a Fabr. Enf. Syst. p.252, 89 



1805 O h i r o n o niu s Fabr. Syst. Antl. p.47, 46 



1818 Chironomus Meigen. Syst. Beschr. 1 : 43, 53 



1850 Chironomus Zett. Dipt. Scancl. 9 : 3558, 85 



1864 Chironomus Scliiner. Fauna Austr. 2 : 611 



1874 Cricotopus V. cl. Wulp. Ti.jds. v. Ent 17 : 132 



1877 Cricotopus V. d. Wulp. Dipt Neerl. p.274, S 



1899 Cricotopus Johnson, in Smith's Cat'l. Ins. N. J. p.627 



