222 NEW YORK STATE MUSEUM 



of thorax pale yellowish, pruinose, or with a greenish tinge, with 

 three brown stripes ; the scutellum yellow ; the metanotum, 

 sternum (and sometimes the pleura also) dark brown. Ajbdomen 

 dark brown or black, sulbshiuiug, sometimes the segments with 

 a suggestion of a pruinose margin ; hairs pale brown. Legs yellow, 

 the knees and the tarsi somewhat infuscated; tips of the tibiae 

 blackish. Legs hairy, including the fore tarsi ; fore metatarsus 

 nearly twice as long as the tibia, the second and third nearly 

 suibequal in length, the fourth but little shorter, the fifth shortest. 

 Wings hyaline, sometimes slightly smoky, anterior veins yellow, 

 the crossvein but little if any darker. Halteres pale yellow. 



Female. The head with mouth parts and antennae (except the 

 apical joints) more yellowish, thoracic stripes sometimes more 

 reddish, and the abdomen a blackish green; anterior tarsi bare; 

 in other respects like the male. 



This species dliffers from C. halteralis Goq. in having pale 

 halteres and the female having a blackish green abdomen. From 

 C. 1 o n g i p e s Staeger, an European species, it differs in having 

 shorter tarsi. Ithaca, N. Y., July and August. 



36. Chironomus tendens Fabricius 



1794 T i p u 1 a Fabr. Ent. Syst. 4 :243, 47 



1805 Chironoinus Fabr. Syst. Antl. p.39, 7 



1818 Chironomus Meigen. Syst. Beschr. 1 :34, 30 



1850 Chironomus Zett. Dipt. Scand. 9 :3525, 45 



1864 Chironomus Schiner. Fauna Austr. 2 :605 



1877 Chironomus V. d. Wulp. Dipt. Neerl. p.257, 15 



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



Dorsum of the thorax shining reddish yellow, with three wide 

 ferruginous longitudinal stripes, which occupy nearly the whole 

 of the dorsmn; the median one abbreviated posteriorly, and only 

 continued in an embossed yellow line to the scutelluim; pectus, 

 metanotum and scutellum ferruginous. Abdomen yellow or yel- 

 lowish green ; white-haired; the anterior ends of the segments 

 and on the dorsuim of the posterior segments somewhat darker; 

 the forceps slender and strongly upcurved. Head yellow; 

 antennae with the shaft brown, the basal joint and the hairs 

 ferruginous; palpi brownish. Legs pale yellow, sometimes the 

 tip of the tibiae and of the tarsal joints slightly darkened ; fore 

 tarsi of the male more or less thickly haired ; metatarsus one 

 fourth longer than the tibia. Wings whitish yellow; halteres yel- 

 low. The female is wholly shining ferruginous, with rather 

 deeply yellow tinged wings. Length 6.5 to 7.5 mm. Schiner, loc. 

 cit. New Jersey (Johnson). 



