1921] NATURAL SCIENCES OF PHILADELPHIA. 75 



the anal angle a little darker; stigma very narrow and indistinctly 

 brownish; veins brownish black. Venation: Sc long, Sci extending 

 to just beyond r, Sc2 some distance from the tip of Sci, the latter 

 alone being longer than the basal deflection of Cui; Rs relatively 

 short and almost straight; R1+3 about one-third longer than the 

 basal deflection of Cui and more than one-half of Rs; r on R2 a little 

 more than its own length beyond the fork of R2+3; veins R2 and 

 Rs long, running parallel to one another; basal deflection of R^+s 

 very short, almost in alignment with Rs and the distal section of 

 Ri+i,; cell 1st M2 long and narrow, widened distally, m and the 

 outer deflection of M, subequal; basal deflection of Cui at about 

 one-third the length of cell 1st Mn; vein 2ml A straight. Abdomen 

 black. 



Habitat. — Peru. 



Holotype, cf , Yurimaguas, April 1, 1920 (H. S. Parish). 

 Gnophomyia axillaris sp. n. 



General coloration black; wings subhyaline, the costal and sub- 

 costal cells, the stigma and the wing-axil brown. 



MaZe.— Length about 6 mm. , wing 6.3 mm. 



Rostrum and palpi black. Antennae black. Head black. Tho- 

 rax deep black, including the legs and halteres. Wings subhyaline; 

 costal and subcostal cells, the stigma and the wing-axil brown; 

 faint brown seams along Cu and at the wing-apex; veins dark brown. 

 Venation: Sc long, Sci extending to beyond two-thirds the length 

 of Rs; Sci some distance from the tip of Sci, the latter alone being 

 nearly equal to i?2 s', Rs straight, in alignment with Rt + s, the 

 deflection of the latter obhterated; R2+3 straight; r faint, on R^ 

 at about its own length beyond the fork of Rz+i', cell 1st Mi long 

 and narrow, widened distally; basal deflection of Cui at just before 

 one-third its length. Abdomen black. ]Male hypopygium with the 

 longest pleural appendage acicular, tapering to the subacute tip. 



Habitat. — Peru. 



Holotype, d", Iquitos, May 24, 1920 (H. S. Parish). 



Gnophomyia nigrina (Wiedemann) 



Igarape Assu, Brazil, July 16, 1919 (H. S. Parish). 

 Prata, Brazil, July 1-4, 1919 (H. S. Parish). ■ 

 Teffe, Brazil, December 25, 1919 (H. S. Parish). 

 Yurimaguas, Peru, March 21-April 20, 1920 (H. S. Parish). 



Gnophomyia subhyalina Alexander. 



1913. Gnophomyia subhyalina Alexander, Proc. U. S. Nat. Mus., vol. 44, 

 p. 523. 



Igarape Assii, Brazil, 1912 (H. S. Parish). 

 Prata, Brazil, July 4, 1919 (H. S. Parish). 



