230 NEW YORK STATE MUSEUM 



45. Chirononms pallidus n. sp. 

 (P1.29, fig.5) 



Male. The thorax yellow ; abdomen whitish ; length 4 to 4.5 mm. 

 Head yellow, including two basal joints of antennae; proboscis 

 and palpi fuscous or subfuscous; the flagellum of the antenna 

 dusky yellow. Thorax ferruginous, the scutelluin, the humeri, 

 space in front of the scutelluin and between the ferruginous dorsal 

 stripes is yellowish or whitish; metathorax testaceous, brown or 

 sometimes blackish. Abdomen white; yellowish or pale greenish 

 toward the tip. Genitalia white. Legs white, tip of fore femur, 

 base and tip of fore tibia, blackish; extreme tips of middle and 

 hind tibiae each with a minute black comb; the knees of middle 

 and hind legs sometimes slightly infuscated. Fore metatarsus 

 about one quarter longer than its tibia; fore legs nearly bare, 

 middle and hind ones rather hairy. Wings hyaline, veins nearly 

 colorless. Halteres white. 



Female. Antennae yellow with apical joint fuscous. Abdomen 

 pale greenish. Ithaca, N. Y. July and September. 



46. Chironomus frequens n. sp. 

 (P1.29, flg.7) 



Differs from brevitibialis (No. 42) in that the fore meta- 

 tarsus is only one third longer than its tibia, the tibia more than 

 three quarters as long as its femora. The face and palpi are 

 yellowish in some specimens. The apical one third of the fore 

 tibia and of the metatarsus, the third fore tarsal joint, the whole 

 of the fourth and fifth joints of all the feet, and the tips of all 

 the other tarsal joints, blackish. The tips of the second and third 

 tibiae each with a minute black comb. The paler portion of tibia 

 and metatarsus is white. In other respects the two descriptions 

 correspond. Length 3.5 to 4 mm. Many female specimens. Ithaca, 

 N. Y. 



47. Chironomus viridis Macquart. 



1834 Chironomus Macq. Suit & Buffon. \ :52, 21 



1838 Chironomus Meig. Syst. Beschr. 7 : 6, 127 



1850 Chironomus Zett Dipt. Scand. 9 :3531, 53 



1864 Chironomus Schiner. Fauna Austr. 2 : 605 



1877 Chironomus V. d. Wulp. Dipt Neerl. p.258, 17 



1895 Chironomus Johnson. Proc. Acad. Nat Sc. Phil, p.320 



1767 Tipula? virens Linn. Syst. Nat ed. XII. 2 :975, 34 



1838 Chironomus vulneratus Zett Ins. Lappon. p.814, 28 



Male. Dorsum of the thorax greenish yellow, with three fer- 

 ruginous longitudinal stripes as with C. tendens. The 

 sternum, a spot on the pleura and the metanotum ferruginous. 

 Abdomen a beautiful light green; on the dorsum, particularly 



