457 



dish brown and the abdomen grass-green darkened apically. In other 

 respects the agreement is perfect. 



The early stages are unknown to me. 



38. Chironomus harti, n. sp. 



Female. — Head brownish yellow ; antennie yellow, scape and apical 

 joint brown; palpi brown. Thorax yellowish, opaque, vittae, greater 

 portion of sternopleura, and spot below wing-base brown, opaque, disc 

 of mesonotum with grayish pruinescence between the vittse ; postnotum 

 blackish brown. Abdomen blackish brown, opaque, posterior margins 

 of segments narrowly pale. Legs whitish yellow, apices of mid and 

 hind tibise narrowly brown ; apices of tarsi slightly browned. Wings 

 clear, veins pale yellowish ; cross vein not infuscated. Halteres whit- 

 ish yellow. Body hairs pale brow-n. 



Frontal tubercles absent. Pronotum linear. Legs rather stout 

 basal joint of fore tarsi about a ninth longer than fore tibise (21 : 19) 

 mid and hind legs with moderately long hairs ; empodia small, pulvilli 

 indistinguishable ; apices of hind tibise with the normal comb. Third 

 vein ending slightly farther in front of apex of wing than fourth does 

 behind it; cross vein distinctly, but not greatly, before wing-middle; 

 cubitus forking distinctly beyond cross vein, its posterior branch form- 

 ing a rather obtuse angle with the anterior one, so that its apex is 

 almost in line w'ith apex of basal third of anterior branch. 



Length, i mm. 



Type locality, Urbana, 111., September 5, 1914, at light in city (C. 

 A. Hart and J. R. Malloch). 



Named in honor of my colleague, Charles A. Hart. 



Early stages and male unknown. 



39. Chironomus viridicollis Van der Wulp 



Chironomus viridicollis Van der Wulp, Tijdschr. v. Ent., Vol. 2, 1858, p. 161. 



Larva. — Length, 8-10 mm. Blood-red. Head yellowish, about a 

 third longer than broad, posterior margin, anterior margin of labium, 

 teeth of mandibles, and the eye spots blackish brow-n ; disc of ventral 

 surface brownish; labial plate (PI. XXIX, Fig. 10) similar to that of 

 dccorus, the central tooth rounded ; mandible with 4 teeth, including 

 the apical one, on inner ventral surface, and one much paler in color 

 and distinctly smaller on the dorsal surface at base of apical tooth; 

 labial papillse similar to those of tcntans ( ?) ; basal antennal joint stout, 

 its length nearly equal to that of mandible and four times its own diam- 

 eter, sensory organ a1)out one fourth from base ; second joint about 



