44 PROCEEDINGS OF THE ACADEMY OF [Part I 



extending but a short distance beyond the origin of Rs, Sco close 

 to the tip of Sci,- Rs long, slightly angulated at origin; r more than 

 its own length from the tip of Ru cell 1st M-2 long and narrow, longer 

 than any of the veins issuing from it; basal deflection of Cu: before 

 to immediately beyond the fork of M. Abdominal tergites light 

 brown, the sternites a little paler. 



Habitat. — Peru. 



Holotype, d", Iquitos, May 6, 1920 (H. S. Parish). 



Allotype, 9 , Yurimaguas, April 22, 1920 (H. S. Parish). 



Geranomyia bicincta sp. n. 



Head dusky black; a narrow silvery gray stripe extending from 

 the front to the occiput; flagellar segments with very long verticils; 

 mesonotal praescutum orange, the lateral margins broadly pale 

 brown, margined internally by a delicate gray line; femora obscure 

 yellow, brightened at the end of the segment, the tip and a narrow 

 subterminal ring dark brown; penultimate tarsal segment with a 

 comb of about eight spines on the distal half; wings faintly yellow- 

 ish with four small brown spots along the costa, the one at the 

 origin of Rs separated from the one at the tip of Sc, the latter vein 

 long, extending to beyond midlength of Rs. 



Male. — Length (excluding rostrum) about 4.5 mm.; wing 5.8 mm., 

 rostrum alone about 2.8 mm. 



Female. — Length (excluding rostrum) about 6.8 mm.; wing 6.7 

 mm.; rostrum alone about 3.8 mm. 



Rostrum moderately long and slender, brownish black. Anten- 

 nae black, the distal flagellar segments a little paler; flagellar seg- 

 ments with unusually long verticils. Head with the vertex between 

 the eyes narrow, silvery gray, this color continued caudad to the 

 occiput; remainder of the vertex dusky black. Mesonotal prae- 

 scutum orange, the lateral margins broadly pale brown; viewed 

 from above these lateral margins appear much darker l^rown and 

 there is a narrow silvery gray line between them and the orange 

 disk; remainder of the mesonotum obscure yellowish. Pleura yel- 

 lowish testaceous, the dorsal sclerites diffusely plumbeous. Halteres 

 pale, the knobs brown. Legs with the coxae and trochanters testa- 

 ceous; femora obscure yellow, the end of the segment brighter than 

 the base, the extreme apex narrowly dark brown; a short distance 

 from the tip is a narrow dark brown ring, this about equal in extent 

 to the yellow subterminal ring; tibiae and tarsi brown; the pen- 

 ultimate and antepenultimate tarsal segments each bear a comb of 

 spines on the inner face but that on the penultimate segment is here 

 confined to the distal half of the segment and is composed of only 

 about eight spines; terminal tarsal segment comparatively short 

 and without a distinct comb, claws slender, the outermost of the 

 teeth at the base of the claws produced into a long, hairlike point. 

 Wings with a faint yellowish tinge, brighter in the costal and sub- 



