479 



and South Haven, Mich., July 13 and 14, and from Cedar Lake, Ind., 

 July 17, 1914 (C. A. Hart). 



The description of the pupa of this species agrees fairly well with 

 that of Chirononuis species C, given on page 529 of the present paper, 

 differing as indicated in notes under that species. 



59. Chironomus parvilamellatus, n. sp. 



Male. — Greenish yellow, slightly shining. Head yellowish, scape 

 of antennae black, shining, flagellum pale brown, plumes yellowish. 

 Mesonotum with dark brown vittae, the whole disc covered with slight 

 grayish pruinescence ; scutellum yellow; pleural spots and postnotum 

 dark brown. Abdomen green, almost entirely suffused with fuscous. 

 Legs greenish yellow, fore legs with the exception of the femora 

 brownish, becoming darker on tarsi, apices of mid and hind tarsi 

 browned. Wings clear, veins yellowish, cross vein very indistinctly 

 infuscated. Halteres yellow. 



Antenna more than 1.5 times as long as head and thorax together. 

 Pronotum narrow, central excision indistinct. Hypopygium almost 

 the same as that of ahhrcviatns (PI. XXXIV, Fig. 18), the apical por- 

 tion of the lateral arm comparatively shorter and stouter. Legs 

 slender, fore tarsi without long hairs, basal joint very slightly more 

 than 1.5 times as long as fore tibiae (57: 36) ; mid and hind legs with 

 moderately long hairs; pulvilli and empodia distinct. Third vein end- 

 ing very slightly farther in front of apex of wing than fourth does be- 

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



Length, 4- 5-5-5 mm. 



Type locality, Grand Tower, 111., April 22, 1914, swept from vege- 

 tation on bank of Big Muddy River (C. A. Hart and J. R. Malloch). 



This species bears a close resemblance to ahhreviatiis and fnlvus, 

 but from the former it may be distinguished by its color and the ab- 

 sence of long hairs from the fore tarsi, and from fulviis as indicated 

 in key. It differs from Johannsen's description of dux in having the 

 basal joint of fore tarsi one half longer than fore tibiae instead of 

 about a third longer, the latter being the proportion given for dux. 



60. Chironomus obscuratus, n. sp. 



Male. — Bright green, slightly shining. Head green ; scape of an- 

 tennae yellow, flagellum fuscous, yellow at base, plumes brown, yellow- 

 ish white at bases; palpi green, brownish apically. Mesonotum with 

 reddish yellow vittae ; spots on sternopleura and below wing-base, and 

 the postnotum concolorous with vittae. Abdomen yellowish at apex. 



