Mar., 1908. 



Mitchell: New Species of Gnats. 



13 



Chironomus perpulcher, new species. 



Male. — Antennae, both joints and hairs, black, with brownish reflections ; head 

 black. Mesonotum polished, the wide, golden brown vittse separated by very indis- 

 tinct, light lines ; rest of body chocolate brown or black except claspers, which are 

 mostly white. Wings hyaline, the tips clear, two chestnut brown bands completely 

 crossing wing, the distal one mottled with clear spots and occupying the middle part 

 of the space between tip and cross vein, the proximal band extending in width from 

 cross vein about halfway to base of wing (fig. 9, </). Legs (fig. n), cox;< 

 at bases, white distally ; fore femora yellowish white on proximal, black on distal 

 half; middle femora light brown on proximal two thirds, chocolate brown to black on 



Figs. 10 to 12. Comparison of leg markings : IO, C. iticvus ; II, C. perpulcher ; 

 12, C. hirtipes. 



distal third; hind femora black on distal three fourths except for snow white tip, 

 remainder creamy ; fore tibias snowy on proximal two thirds, distal third I 

 middle tibire deep chestnut brown ; hind tibice snow white for about the basal fourth; 

 remainder black ; front tarsi with first joint chocolate brown at very base, also for 

 about distal fourth, remainder pale brown, second joint about the same, other joints 

 chocolate brown to black at claws ; middle tarsi, first three joints yellowish brown 

 with black on the distal fourth, third and half respectively, last two joints black ; 

 hind tarsi, first four joints yellowish white with black on distal fifth, fourth, third and 

 half; last joint light brown. Length 4.5 mm. Wing length 2.5 nun. 

 Female. — Practically the same as the male. 



Taken at Plummer's Island, Md., August 11, by Dr. A. K. 



Fisher. 



Type. —Male, Cat. No. 11 142, U. S. N. M. 



