22 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 73 



Wing subhyaline, brownish along the veins, the third vein with 

 three or four small setules at base. Both calypters white. 



Length, 11 mm. 



Female. — Front 0.40 of the head width, with three stout proclinate 

 orbitals on each side; palpi brownish-yellow; third antennal joint 

 three times the second. 



Length, 11.5 mm. 



Described from five males and one female collected near Washing- 

 ton, D. C. The type and one other male are from Falls Church, Va., 

 collected June 10, 1913 (S. A. Rohwer), on flowers of chestnut. 

 Another male was collected near Glen Carlyn, Va. (W. L. McAtee), 

 June 11, 1916; one at Difficult Run, Va., September 14, 1913 

 (Shannon); and the fifth one at Plummer Jsland, Md. (H. L. 

 Viereck), July 4, 1916. The single female (allotype) was collected 

 at Falls Church, Va. (C. T. Greene), on Ceanothus flowers, July 4, 

 1917. 



Type— Mole, Cat. No. 40473, U.S.N.M. 



BELVOSIA CILIATA, new species 



Male. — Front 0.30 to 0.31 of the head width at level of anterior 

 ocellus, widening gradually for a short distance, then more rapidly; 

 frontal bristles in three irregular rows, the hairs below them black 

 and rather coarse; parafrontals with gray pollen below which 

 becomes very thin above, so that the dark ground color shows 

 through to some extent; face, parafacial, cheek and posterior orbit 

 silvery white; cheek with black hairs. Vibrissae a little higher 

 above the epistoma than in most of the species but not quite as high 

 as in hicincta. Facial ridges with strong bristles almost up to the 

 arista; third antennal joint black, rather slender, concave on front 

 side, hardly twice as long as the second, which is reddish brown in 

 color. Palpi yellow; beard white. 



Thorax black, the sides and scutellum reddish, anterior part with 

 thin gray pollen and with inconspicuous stripes. 



Abdomen black, sometimes slightly reddish on the sides, the sec- 

 ond segment with at most a mere trace of pollen at base, sometimes 

 none; third segment with a narrow interrupted basal band of pale 

 pollen, or sometimes none at all on upper surface; fourth segment 

 with whitish or pale yellow pollen extending to the tip. First and 

 second segments each with one pair of marginal bristles, third with a 

 marginal row, fourth with a rather scattered submarginal row smaller 

 than those on the third segment. 



Legs black, front pulvilli fully as long as the last two tarsal joints. 

 Hind tibia with dense, stout cilia apparently in several rows close 

 together. 



