MAY FLIES AND MIDGES OF NEW YORK 213 



1850 C h i r o n o Lu u s Zett. Dipt. Scand. 9 : 3485, 4 



18<j4 C b i r o n o m u s Schiner. Fauna Austr. 2 : 602 



1877 C li i r o u o lu u s V. d. Wulp. Dipt. Neerl. p.253, 7 



1804 Obironomus annulatus Meigen. Klass. 1 : 12, 2 



1818 Chirouomus pallens Meigen. Syst. Beschr. 1 : 22, 5 



1818 Ohironomus tristis Meigen. Syst. Bescbr. 1 : 48, 62 



This species resembles r i p a r i u s but diiTers in having the 

 posterior margins of the abdominal segments grayish, not sharply 

 separated from, but blended into, the black; and in having the 

 third and fourth tarsal joints of the fore legs subequal in length, 



Male. Head and antennae blackish, palpi and pi-oiboscis fuscous. 

 Dorsum of the thorax cinereous with three dull, black stripes; 

 metanotum, pleura, and sternum dull black, slightly pruinose; 

 scutellum fuscous. Abdomen fuscous or black, the posterior 

 margins of the segments gi-ayish, the hairs yelloAvish, genitalia 

 small, black. Coxae blackish; legs siibfuscous, tarsi slightly 

 darker. Fore metatarsus about one fifth longer than the tibia, 

 the third and fourth tarsal joints about equal in length, the fore 

 tarsi and the middle and hind legs long-haired. The wing's 

 Inaline, the anterior veins dark, particularly the crossvein. The 

 venation as figiired (pl.28, fig.ll). Halteres whitish. Length 

 7 to 8 mm. 



Female. Like the male but the anterior tarsi are bare, and in 

 the single specimen the tips of the femora are darkened. Ithaca, 

 X. Y. A darker variety (var. tristis Meig.) with slightly infus- 

 cated halteres from >yashiugton State. 



I have compared my sipecimeus "with s]jecimens from Europe 

 and can det^t no differences. 



23. Chironomus dispar Meigen 



1830 Chironomus Meigen. Syst. Beschr. 6 : 247, 85 



1850 . C b i r o n m u s Zett. Dipt. Scand. 9 : 3506, 22 



1864 Cblronomus Scbiner. Fauna Austr. 2 : 604 



1877 Chironomus ^'. d. Wulp. Dipt. Neerl. p.257, 13 



1838 Chironomus 1 u c i d u s Zett. Ins. Lappon. p.810, 5 



1850 Cblronomus Zett. Dipt. Scand. 9 : 3509, 25 



'Shining black; the abdomen somewhat brownish, with paler 

 hairs and occasionally reddish yellow lateral spots; the anal 

 segment narrower and shorter than the prec-eding segment ; the 

 forceps strong, its arms nearly as long as the last abdominal seg- 

 ment. Head black, the palpi brown, the antenna together with 

 its hairs blackish. The legs yellow, the coxae brown; the tibiae 

 brown at the tip, fore tarsi delicately ciliate, the metatarsus one 

 half longer than its tibia. Wings whitish. The crossvein not 



