AKT. 8 KEVISION OF THE FLY GENUS BELV0SL4l ALDKICH 29 



considerably thinner above so as to show thej'dark ground color to 

 some extent. Face, parafacials, cheeks and posterior orbits densely 

 silvery white pollinose. The hairs below the upper parafacials and 

 those of the cheeks black. Antennae black, rather long, the third joint 

 about two and a half times the second; vibrissae situated consider- 

 ably above the oral margin. Facial ridges bristly almost to the arista. 

 Palpi yellow to brown, beard white. 



Thorax black, dorsum quite shining with very thin pollen anteriorly; 

 scutellum dark brown; sternopleurals usually six or seven. Scuteilum 

 with six or seven pairs of lateral bristles, no distinct apicals. 



Abdomen black and subshining on the first two segments, the 

 remaining two deep golden pollinose except apical fourth. First seg- 

 ment with four to six spiny marginals, second segment with the same 

 number; third and fourth with a marginal row. Venter with clusters 

 spines mostly on the tergites. 



Legs black, front pulvilli elongated, almost equal to last two tarsal 

 joints. Hind tibia with rather long bristles and numerous coarse 

 hairs. 



Wings blackish, both calypters of the same color. 

 Female. — Front 0.39 to 0.40 of the head width at vertex. 

 Length, 15-16.5 mm. 



The species is very robust, one of the females measuring 9 mm. 

 across the abdomen. 



Described from 5 males and 15 females. The type is from Harris- 

 burg, Pa. (Sanders), and two females, including allotype, are from the 

 same place (Walton); one female, Rockville, Pa. (Champlain); one 

 female, Inglewood, Pa. (Kirk); one, Linglestown, Pa. (Fisher, this 

 with the two preceding in Mr. Walton's donation to the Museum) ; 

 one male, Charter Oak, Pa. (KnuU); three females, Springfield, Mass. 

 (Dimmock), identified about 1894 by Brauer and Bergenstamm as 

 " Latreillia hifasciata Fab.;" One, Colebrook, Conn. (Wheeler), 

 received from C. W. Johnson; one, Reading, Pa.; one, Pimmit Run, 

 Va. (Knab); one. Difficult Run, Va. (Shannon); two, Ira, Summit 

 County, Ohio (Hine); one, Agricultural College, Miss. (Turman, 

 received from C. H. Curran). From the American Museum were 

 received two females from Black Mountains, N. C. (Beutenmtiller) , 

 and one from West Farms, New York City (Angus). 

 Type—M&le, Cat. No. 40481, U.S.N.M. 



BELVOSIA BIFASCIATA Fabridiu 



Musca hifasciata Fabricius, Systema Ent., 1775, p. 777; Ent. Syst., vol. 4, 



1794, p. 325; Syst. Antl., 1805, p. 299. 

 Ocyptera hifasciata Latreille, Diet. d'Hist. Nat., vol. 24, 1804, p. 195. 

 Tachind'Jbifasciata Wiedemann, Auss. Zweifl., vol. 2, 1830, p. 305. 

 Latreillia hifasciata Robineau-Desvoidy, Myodaires, 1830, p. 104. 

 Nemoraea hifasciata Macquart, Hist. Nat. Dipt., vol. 2, 1835, p. 104. — 



Bigot, in Sagra's Cuba, vol. 7, 1857, p. 342. 



