222 NEW YORK STATE MUSEUM 



of thorax pale yellowish, priiinose, 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, siiibshining, sometimes tlie segments with 

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

 the knees and the tarsi somewhat infuscated ; tii)s of the tibiae 

 blackish. Legs hairA', including the fore tarsi ; fore metatarsus 

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

 sulbequal 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 diiffers from C, halteralis Coq. 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 Chironomus 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 Austi\ 2 :605 



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



1899 Chironomus Johnson, in Smith's Cat'], 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 dorsum; the median one abbreviated posteriorly, and only 

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

 metanotum and scutellum fei*rugiuuus. Abdomen vellow or vel- 

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

 and on the dorsnan of the posterior segments somewhat darker; 

 the force}>s slender and strongly upcurved. Head yellow ; 

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

 ferruginous; ]»al])i 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 

 deei)ly yellow tinged wings. Ixmgth 0.5 to 7.5 mm. Schiner, loc. 

 cit. New Jersey (Johnson). 



