482 



tinct annuli as in dcconis; palpi fuscous. Mesonotum with pale 

 pruinescence, which gives it a whitish bloom, especially between the 

 vittai ; vittae deep brown ; sternopleura and a patch below wing-base 

 deep brown; postnotum blackish. Abdomen brownish black, postero- 

 lateral angles of segments yellow; all segments with the apical third 

 whitish pruinescent. Legs greenish yellow, knees, almost the entire 

 fore tibiae, apices of mid and hind tibiae, and apices of tarsal joints 

 blackened. Wings clear, cross vein infuscated. Halteres yellow, 

 sometimes blackened at apices. 



Frontal tubercles small but distinct. Hypopygium similar to that 

 oi decorus (Fig. ii, PI. XXXIII). Fore legs with the tarsi very 

 long and slender, proportions of fore tibiae and fore tarsal joints as 

 follows : 51, 92, 47, 41, 38, 17; fore tarsi bare; mid and hind legs 

 with long hairs. Third and fourth veins ending about equal distances 

 from apex of wing; cubitus forking below cross vein. 



Female. — Agrees with male in color. 



Fore legs nearly 10 mm. in length, proportions of fore tibiae and 

 fore tarsal joints as follows: 55, 102, 53, 50, 50, 20; mid and hind 

 legs short-haired. Cubitus forking slightly beyond cross vein. 



Length, 5-6.5 mm. 



Type locality, Urbana, 111., September 27 and October 2, 1914, 

 at light and on windows (C. A. Hart and J. R. IMalloch). Paratypes 

 from Havana, September 13, 1895, at light (C. A. Hart), and from 

 L"^rbana, May 3 and 22, and October 3 (C. A. Hart and J. R. Mal- 

 loch). 



Females of this species were observed feeding upon fly-specks on 

 a store window in Urbana, having been attracted to the window by 

 light. 



65. Chironomus alboviridis, n. sp. 



Female. — Green, opaque. Head, with the exception of the black 

 eyes, center of face, and the apical joint of antennae, entirely yellow. 

 Thorax pale green ; the vittae, a spot below wing-base, and the 

 greater part of sternopleura reddish, the entire surface, with the ex- 

 ception of the red portions, covered with dense whitish pruinescence; 

 scutellum pale green ; postnotum yellowish at base, gradually black- 

 ened towards apex. Abdomen dark green, apices of segments paler. 

 Legs pale yellow; fore femora and tibiae brown; apices of basal two 

 and whole of apical three tarsal joints of fore legs, apices of tibiae, 

 apices of basal three and the whole of apical two joints of tarsi of 

 mid and hind legs blackish brown. Wings whitish, veins vitreous, 

 apices of veins i and 3 yellow. Halteres greenish yellow. Hairs on 

 body and legs white. 



