234 NEW YORK STATE 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 in 

 attached a spiked mace-like appendage (pl.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- 

 scription given above. 



53. Chironomns festivus Say 



1823 Chirononius Say. Journ. Acad. Nat Sc. Phil. 3 : 13, 2 

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

 1859 Chiroiiomus Say. Compl. Wr. 2, 41 

 1878 Chirononius 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 

 brown, when recent, pale 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; thighs green; tarsi dusky at the incisures; an- 

 teriors nearly naked, with hairy tarsi; abdomen, second, third, 

 fourth and fifth segments tipped with blackish above. Length of 

 female 7/20 of an inch (9 mm.). Observed particularly in Illi- 

 nois. 'Say, loc. cit. 



Wiedemann describes both male and female, but gives the 

 length as 6.5 mm. A male specimen bearing the label C. 1 i n e o 1 a 

 Wied., Westville, N. J., agrees with the above description of 

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

 the fore 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 C. t e n d e n s 



