234 NEW YORK STAT-E MUSEUM 



segments with their bases and an obsolete longitudinal line black ; 

 on the middle of the base of the second, third, fourth and fifth 

 segments is a small, longitudinally oval, slightly elevated lobe, 

 extending nearly one-third the length of the segment. Length 

 three tenths (=7.5 mm.). Inhabits the United States. Say, 

 loc. cit. 



The larvae and pupae were collected by Mr C. S. Banks at 

 Albany N. Y. The imago was not bred, but from nearly mature 

 pupae it was determined that on the dorsal surface of the pos- 

 terior margin of each abdominal segment excepting the last is 

 attached a spiked mace-like appendage (pi. 23, fig.4) which ex- 

 tends one third the length of the segment following. On the 

 anterior segments this lobe is somewhat smaller and shorter. 

 As it lies closely applied to the dorsal surface of the segment it 

 appears as if it were a nodule of that segment rather than a 

 process from the segment preceding. The imaginal colors could 

 be distinctly seen through the pupal skin, agreeing with the de- 

 Bcription given above. 



53. Chironomus festivus Say 

 1823 Chironomus Say. Journ. Acad. Nat. Sc. Pliil. 3 : 13, 2 

 1828 Chironomus Wied. Aussereurop. Zweifl. Ins. 1:16, 5 

 1859 C h i r o u o m u s Say. Compl. Wr. 2, 41 

 1878 C h i r o n o m u s Ost. Sack. Cat'l. Dipt. N. A. p.20 



Body pale, when recent, light green ; pectus, three thoracic 

 lines and scutel testaceous; wings white. Bodv pale yellowish 

 browu. Avheu recent, i)ale green; head at base of the antennae 

 testaceous; antennae light brown; eyes deep black; thorax trili- 

 neate with testaceous, scutel testaceous; wings white, immacu- 

 late; pectus testaceous between the two anterior pairs of feet; 

 feet pale, hairy; thiglis green; tarsi dusky at Ihe incisures; an- 

 leriors nearly naked, with hairy tarsi; abdoiiuMi, second, third, 

 fourth and fifth segiueiits 1i]tj:e(l ^^•ith blackisli above. Length of 

 female 7/20 of an inch (I) mm.). Observed jtarticularly in Illi- 

 nois. Say, loc. cit. 



\Viede>mann describes both male and female, but gives the 

 lengtli as G..5 mm. A male specimen bearing tlie label (\ 1 i n e o 1 a 

 ^Vied., Westville, X. .).. agrees with the above description of 

 festivus, and I believe it to be the latter. In this specimen 

 the foic metatarsus is about 1.4 times as long as its tibia, and the 

 fore tarsi are provided with long hairs. This species seems to be 

 closely related to 0. t e n d e n s 



