ART. 8 REVISION OF THE FLY GENUS BELVOSIA ALDRICH 17 



its lower part is not much wider than the vertex. Frontal bristles in 

 several irregular rows; three proclinate orbitals present; face and 

 parafacials silvery, cheeks and posterior orbits with a yellow tinge, 

 the hairs on the upper parafacial pale, also those of cheeks and some 

 just outside the bristles of the facial ridges. Facial depression 

 decidedly deep, the vibrissae not much above the mouth, facial ridges 

 with very strong bristles almost to the arista. Antennae red at base, 

 third joint becoming brown beyond the arista and nearly black at 

 tip; second antennal joint short, only about one-sixth the length of 

 the third, which is considerably elongated. Arista flattened almost 

 to the apex, which is acutely pointed. Palpi yellow; beard pale 

 yellow. 



Thorax black with thin gray pollen; scutellum yellowish brown. 



Abdomen black, the sides tinged with reddish in ground color. 

 Second segment with indistinct pale yellowish band, very narrow in 

 most angles, sometimes, however, spreading almost across the segments ; 

 third segment with yellow pollen covering almost three-fourths of its 

 length in the most favorable light, but so changeable that it usually 

 seems to cover about one-half; fom-th segment entirely deep yellow 

 pollinose with scattering erect hairs. First segment with a small pair 

 of median marginals; second with a normal pair; third with a 

 marginal row; fourth with a sparse marginal row smaller than those 

 on the third. Genitalia small, brown. 



Legs black; front pulvilli minute; hind tibia on the outer side with 

 a suberect, irregular row of about 10 bristles. 



Wings slightly infuscated, bend of fourth vein with or without 

 slight appendage. Subepaulet orange yellow, calypters pale yellow. 



Female. — Front at vertex 0.43 to 0.44 of the head width. Third 

 antennal joint hardly three times as long as the second, more slender 

 at the base than in the male. Abdomen much more reddish than in: 

 the male. 



Length, 10-11 mm. 



Redescribed from original type series, two males and one female, 

 Sapucay, Paraguay (W. T. Foster); and one male sent by the 

 Hawaiian Sugar Planters' Association, collected by F. X. Williams at 

 Campinas, Brazil. 



r2/2>e.— Female, Cat. No. 19607, U.S.N.M. 



BELVOSIA EQUmOCTIALIS Townsend 



Triachora equinoctialis Townsend, Proc. U. S. Nat. Mus., vol. 43, 1912, p. 348. 



? Belvoisia insularis Cueran, Amer. Mus. Novitates, No. 260, 1927, p. 4. 



? Belvosia antilliana Curran, Bull. Brooklyn Ent. Soc, vol. 22, 1927, p. 151, 

 in key but not described; Mr. Curran informs me that by an oversight this 

 name was not changed to insularis as intended. It is the same species. 

 78957—28 3 



