42 PEOCEEDINGS OP THE NATIONAL MUSEUM vol.73 



Wings dark brown, front calypters the same, the hind ones rather 

 pale brown. Bend of fourth vein a little nearer the hind margin than 

 usual, the distance being about two-thirds of that from the bend to 

 the hind cross vein. 



Described from 15 specimens of both sexes. Three males, includ- 

 ing the type, are from Sapucay, Paraguay; the allotype and another 

 pair are from Cavinas, Beni, Bolivia (Mulford Biological Exploration, 

 collector W. M. Mann) ; six specimens were received from the Ameri- 

 can Museum of Natural History, collected at Chapada, Brazil (H. H. 

 Smith), and one from East Amazonas; one from Guantanamo, Cuba 

 (Ramsden), was received from C. W. Johnson; and one female from 

 Yucatan (G. F. Gaumer) was received from the University of Kansas. 



Length, 13.5 mm. 



Type.— M&le, Cat. No. 40480, U.S.N.M. 



BELVOSIA ESURIENS Fabricius 



Musca esuriens Fabricius, Syst. Ant!., 1805, p. 301. 



Tachina esuriens Wiedemann, Auss. Zweifl., vol. 2, 1830, p. 309. 



Willistonia esuriens Brauer and Bergbnstamm, Zweifl. Kai?. Mu-., pt. 4, 



1889, p. 97; pt. 5, 1891, pp. 349, 403; pt. 6, 1893, pp. 123, 204. 

 Belvosia esuriens Aldrich, Proc. U. S. Nat. Mus., vol. 72, 1927, p. 32. 



Male. — Front at vertex 0.31 of the head width; the eye rather 

 broadly rounded above so that the narrow part continues forward 

 from the ocelli, then rapidly widening; parafrontal with three very 

 irregular rows of bristles inclined toward the center, the pollen gray, 

 becoming very thin toward the vertex. Face and parafacials pure 

 white, the latter somewhat silvery; hairs below the lowest frontals 

 black, in certain lights two or three may have a pale reflection; cheek 

 white pollinose and with white hairs among which three or four are 

 black. Vibrissae almost the length of the second antennal joint above 

 the oral margin; facial ridges with seven or eight strong bristles, the 

 row almost reaching level of arista; third antennal joint three times 

 the second, which is brown in color; palpi yellow. 



Thorax black with thin gray pollen anteriorly; the scutellum 

 subshining with a brown tinge. Calypters decidedly brown. Sterno- 

 pleurals, 4. 



Abdomen black, subshining; second segment with narrow basal 

 band of light-yellow pollen; third segment with a distinctly inter- 

 rupted band of almost white pollen covering a little more than the 

 basal half and extending on the venter; fourth segment decidedly 

 pollinose except the tip where the bristles arise, which is black; there 

 is also a slender black median line scarcely interrupting the pale pollen. 

 First and second segments with one pair of median marginals; third 

 and fourth with a marginal row. 



Legs black, the front claws and pulvilli elongated, the latter slightly 

 longer than the last two tarsal joints. Hind tibia with several rather 



