AUT. 7 AMERICAN MUSCOID PLIES IN" VLBNITA MUSEUM — ALDRICH 33 



lights two or three may have a pale reflection ; cheek white poUinose 

 and with white hairs among which three or four are black. Cheek 

 two-fifths of the eye. height. 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. Sternopleurals 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 mar- 

 ginals; 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 sev- 

 eral rather large suberect bristles on the outer side on the upper half, 

 the lower half with uniform row of smaller bristles. All these bris- 

 tles stand along the outer side of some more depressed hairlike ones. 



Wings rather light brown in color, narrow toward apex, bend of 

 fourth vein rectangular but rounded, a little nearer the margin of 

 the wing than usual ; base of third vein with three or four hairs. 



Length, 11.5 mm. 



Four specimens of this species, a male and three females, have 

 been received from the American Museum of Natural History; they 

 were collected at Chapada, Brazil, by H. H. Smith. The male has 

 a longer third antennal joint and a narrower band on the third 

 abdominal segment than the Vienna specimen, but the females are 

 like the latter. 



The second specimen received under the name of esuriens will be 

 included as a paratype of a new species, in a revision of the genus 

 soon to appear. 



110. BELVOSIA POTENS Wiedemann 



Tachina potens Wiedemann, Auss. Zweifl., vol. 2, 1830, p. 299. 

 Willistonia potens Beauer and Bergenstamm, Denk. Wien. Akad. Wiss., 

 vol. 58, 1891, p. 403. 



One male, Rio Janeiro, " Coll. Winthem," and an old label " Ta- 

 china potens Wd." Wiedemann described the head of this specimen 

 so well that it must be the type, although he strangely neglected to 

 mention the striking marks of pollen on the abdomen. 

 55415—27 3 



