456 



Length, 5-6 mm. 



I have seen a female spechnen of this species, taken by Mr. Hart 

 at Cedar Lake, Indiana, July 17, 191 4. This locality is very close to 

 the Illinois line, and it is extremely probable that the species occurs in 

 this state, though so far we have no record of it. A male in the col- 

 lection here was taken by Mr. Hart at Delavan Lake, Wis., September 

 6, 1892. Three females taken by A. C. Burrill at Madison, "Wis., June 

 2-9, 1912, one of them on peonies, differ from the description given 

 here in being bright green with brown markings. 



Originally described from Ithaca, N. Y., and from Pennsylvania, 

 Washington State, and New Jersey. Coquillett described fascipes 

 from New Jersey. I have seen a series of both sexes, submitted by 

 Mr. E. T. Cresson, from Pennsylvania. 



Early stages undescribed. 



37. Chironomus nigrovittatus, n. sp. 



Male. — Bright green, shining. Head green ; antenna brown, 

 scape shining black, plumes pale brown ; palpi yellowish brown. Meso- 

 notum with very faint pruinescence, the vitt?e deep black ; sternopleura 

 and an irregular patch below wing-base blackened ; postnotum yellow- 

 ish at base, blackened on dorsum. Abdomen fuscous-green. Legs 

 green, apices of fore femora, whole of fore tibiae, and fore tarsi from 

 before apex of basal joint brownish; mid and hind legs with black 

 apical tibial mark, and the apical joint of tarsi brown. Wings clear, 

 cross vein unclouded. Halteres green. 



Frontal tubercles indistinguishable. Pronotum linear. Hypo- 

 pygium as in Figure 2, Plate XXXIV. Fore tarsi without long hairs, 

 basal joint nearly one half longer than fore tibiae (25 : 17), apical joint 

 of mid and hind tarsi slightly broadened. Third vein ending distinctly 

 farther from apex of wing than does fourth; cross vein slightly before 

 middle of wing; cubitus forking very slightly beyond cross vein. 



Pemale. — Similar to the male except in the usual sexual characters 

 and in having the abdominal segments with narrow pale posterior mar- 

 gins. 



Length, 1.5-2.25 mm. 



Type locality, St. Joseph, May 3, 1914 (J. R. Malloch). Para- 

 types from Berrien Springs, Mich., July 16, 1914, at light (C. A. 

 Hart). 



A male specimen taken at South Haven, Mich., July 15, 1914, at 

 light, by Mr. Hart, differs from the type form in having the vitt^e red- 



