600 PROCEEDINGS OF THE NATIONAL MUSEUM vol.86 



3 females, San Bernardino, Paraguay (K. Fiebrig) ; 1 female, Ca- 

 vinas Beni, Bolivia, February (W. M. Mann), Mulford Biological 

 Exploration of the Amazon Basin, 1921-22. 



CYPHOMYIA NUBILIPENNIS, new species 



A black species with predominantly yellow legs, white abdominal 

 hair spots, and subhyaline wings, which are traversed by a brown 

 cloud. 



Female. — Head black; the lower part of the front and the upper 

 part of the face, however, whitish to yellow, this color gradually dark- 

 ening to black on the face. Front flat, slightly lower than the level 

 of the eyes; almost parallel-sided, only slightly widened toward the 

 vertex ; there is no median furrow, but, on the other hand, the occular 

 orbits on the upper half are very slightly depressed and punctured. 

 Vertex behind the ocellar triangle elevated to the level of the tri- 

 angle and separated from the occipital orbits by definite grooves. 

 Occipital orbits of almost equal width throughout, though slightly 

 broader above; they are narrow, averaging about a third the width 

 of the front; the orbits angularly margined behind. Face divergent 

 below, its width on the oral margin one and one-half times that at 

 the base of the antennae. Pile yellowish white, on the front limited 

 to the punctured areas, semiappressed ; on tlie face longer, rather 

 dense, and more erect. Proboscis brownish yellow ; palpi black. Eyes 

 bare. Antennae black, the first three segments yellowish basally ; the 

 first segment twice as long as the second, the second, ninth, and tenth 

 of approximately equal length, the tenth acute at the apex ; the flagel- 

 lum (third to tenth segments) three times the length of the first. 

 Thorax and scutellum black, slightly shining, with dense yellowish- 

 white tomentum; the scutellum separated from the dorsum by a 

 groove, raised above the dorsum and directed slightly upward; the 

 spines thick, blunt, three-fourths as long as the scutellum, slightly 

 divergent, directed upward in respect to the dorsum but not in re- 

 spect to the scutellum. Legs yellow; the coxae, a subapical annulus 

 on each femur (at least, below), the apical half of the hind tibiae, a 

 narrow longitudinal stripe on the upper surface of the fore and middle 

 tibiae, and the last three tarsal segments brownish. Wings yellowish 

 hyaline; stigma yellow; a brown cloud crossing the wings anterior 

 to the stigma and taking in the apices of the basal cells, most of the 

 discal and fifth posterior cells, and the base of the fourth posterior 

 cell. Halteres yellow. Abdomen black, with conspicuous side spots 

 of yellowish-white tomentum on segments 2 to 5 inclusive. Length, 

 8 mm. 



Holotype. — Female, Cayuga, Guatemala, June 15 (William Schaus). 

 U.S.N.M. No. 52760. 



