371 



Female. — Reddish yellow. Mesonotum with faint indications of 

 vittje. Legs entirely yellow, the comb at apices of mid and hind 

 tibiae weak. Wings clear, veins pale yellow. 



Antenna shorter than length of thorax, and distinctly shorter than 

 wing from base to cross vein; basal joint not mucli swollen, apical 

 joint very slightly so; hairs on antenna long. Mesonotum, pleurae, 

 and scutellum haired as in the male, the abdominal hairs rather long. 

 Legs slender; basal joint of fore tarsus as long as the next three 

 joints and two thirds as long as fore tibia; fourth tarsal joint of all 

 legs longer than fifth; surface hairs not conspicuous, longest at apices 

 of hind tibiae, where their length is about twice the diameter of the 

 tibia. Wing almost as in piloselhis, but the costa extends distinctly 

 round the curve at apex. 



Length : male, 3 mm. ; female, 2 mm. 



Type locality, Thompson's Lake, Havana, 111., May i, 1914. A 

 single male reared from a larva taken by dredging in water eight feet 

 deep. A male was taken at Muncie, 111., May 24, 1914, on the bank of 

 Stony Creek. The female described above I consider as belonging to 

 this species, though it is especially difficult to identify the females of 

 this group owing to their differing so much from the males in color 

 and venation. Locality of female, Havana, 111., September 12, 1895, 

 at light. 



4. Tanypus incoxspicuus, n. sp. 



Male. — Fuscous. Basal joint of antennae dark brown, remaining 

 parts of head pale fuscous. Thorax with whitish pruinescence on 

 spaces between the vittae and on sutures of pleurae ; prescutum yellow- 

 ish; vittae dark brown; scutellum yellowish, centrally fuscous; post- 

 notum with whitish pruinescence, and generally a central narrow 

 streak and a spot on each side of it brown. Abdomen with the ante- 

 rior half of each dorsal segment distinctly whitish pruinose, the seg- 

 ments on the basal half of abdomen with a yellow spot on each side of 

 the posterior half, leaving the dark color in the form of a dorsal stripe 

 with anterior lateral extensions on each segment ; hypopygium red- 

 dish brown. Legs brownish yellow, each femur with a brown band- 

 like mark at apex. Wings slightly fuscous, the veins at extreme base 

 and the cross vein posterior to humeral vein blackish, the cross vein 

 near wing-middle not blackened. Halteres yellow. Hairs yellowish 

 brown. 



Antenna slightly longer than head and thorax together, basal joint 

 globose, large. Mesonotum with the discal hairs confined to the spaces 

 between the vittae and to the lateral margins ; hairs on scutellum long. 



