480 



including the hypopygium. Legs green, tibi?e and tarsi yellowish, fore 

 tibiae and tarsi and apices of mid and hind tarsi brownish. Wings 

 clear, veins yellowish, cross vein not darkened. Halteres green or yel- 

 lowish. 



Frontal tubercles absent. Pronotum narrow. Hypopygium as in 

 Figure 5, Plate XXXIV. Legs slender; fore tarsi without long hairs, 

 basal joint about three fourths longer than fore tibiae (78 : 45), second 

 joint one eighth shorter than tibiae (40) ; mid and hind legs with mod- 

 erately long hairs, their tibiae with the apical combs produced into two 

 points, each point armed with a spur. Third and fourth veins ending 

 respectively at about the same distance before and behind apex of 

 wing ; cubitus forking distinctly, but not greatly, beyond cross vein. 



Female. — Agrees in color with the male except that the fore tibiae 

 and tarsi are more distinctly browned. 



Length, 5-6 mm. 



Type locality, Dubois, 111., April 24, 1914 (C. A. Hart and J. R. 

 Malloch). Paratype from Lilly, III, June 11, 1914 (C. A. Hart). 



61. Chironomus incognitus, n. sp. 



Male. — Greenish yellow, opaque. Head yellow ; scape of antennae 

 shining black, flagellum pale brown, yellowish at base, plumes yellow- 

 ish brown; palpi fuscous. Thorax yellow; vittae, the greater part of 

 sternopleura, a spot below wing-base, and the postnotum grayish 

 black ; disc of mesonotum, including the vittae, covered with rather 

 dense yellowish gray pruinescence. Abdomen green, much suffused 

 with fuscous. Legs yellow, apices of fore femora and bases of fore 

 tibiae slightly suffused with brown, apices of all tibiae narrowly brown, 

 apices of tarsi slightly browned. Wings clear, veins brown, cross vein 

 slightly infuscated. Hairs on legs yellow. 



Antenna over 1.5 times as long as head and thorax together; palpi 

 slightly longer than height of head. Pronotum linear. Hypopygium 

 as in Figure i, Plate XL. Legs long and slender; fore tarsi with long 

 sparse hairs on posterior surfaces of second and third joints ; basal 

 joint more than 1.5 times as long as fore tibiae (54 : 34) ; second joint 

 slightly longer than third; mid and hind legs with moderately long, 

 sparse hairs; pulvilli and empodia large, the latter narrowly fringed. 

 Third and fourth veins ending respectively at about equal distances be- 

 fore and behind apex of wing ; cubitus forking below cross vein. 



Length, 4.5 mm. 



Type locality, Muncie, 111., May 24, 1914, swept from vegetation 

 on bank of Stony Creek (C. A. Hart and J. R. Malloch). 



