^T, 8 REVISION OF THE FLY GENUS BELVOSIA ALDRICH 37 



C. W. Johnson, Caura Valley and Ciudad Bolivar, Venezuela, and 

 Bartica, British Guiana. 



In the Vienna Museum material are 11 specimens; 7 in one series 

 are labeled " Saida Exp. 1887. Dr. Paulay. R. d. Janeiro, aus ein. 

 gr. Raupe gez."^ Of the four other specimens, one is "Brasilien," 

 and " Willistonia bei esuriens. Fiihler anders"; another is also from 

 Brazil and is labeled "esuriens coll. Winthem"; and in faded brown 

 ink, " T. esuriens H. Musca es. F. Para. Brasilia." The tenth is labeled 

 " Ind. or." " WilHstonia det. B. B." ; and on a folded paper I find " Ind. 

 or, oder Amazonen fl." The last bears '' Wthm " and " WilHstonia det. 

 B. B." Although two of these bear the name esuriens, they do not 

 agree with Wiedemann's statement that the third antennal joint in 

 that species is more than twice as long as the two preceding. 



The types of hicincta were said to be from Carolina and the 

 Antilles. 



BELVOSIA POTENS Wiedemann 



Tachina potens Wiedemann, Auss. Zweifl., vol. 2, 1S30, p. 299, 



WilHstonia potens Brauer and Bergenstamm, Zweifl. Kais. Mus., pt. 5, 



1891, p. 403. 

 Belvosia potens Aldrich, Proc. U. S. Nat. Mus., vol. 72, art. 7, p. 33. 



Male. — Front at vertex 0,34 of the head width, the narrowest point 

 being directly across the anterior ocellus; the entire front of the head 

 and the posterior orbits are sUvery pollinose, the frontal stripe, how- 

 ever, brown. In this specimen the reddish ground color of the para- 

 facials, facial ridges, and cheeks shows through to a noticeable extent 

 and the suture is distinctly bordered with a darker tinge to its lowest 

 end. Frontal bristles in a single row, the hairs below the lowest are 

 black as are also the hairs of the cheek. Face considerably depressed 

 in the middle, the vibrissae about the length of the second antennal 

 joint above the oral margin; facial ridges with well-developed bristles 

 up to a point above the middle of the third antennal joint. Antennae 

 black, second joint more dark brown with a tinge of red at the junc- 

 tion with the third, which is three times as long as the second and a 

 little tapering. Palpi dark yellow, cheek almost haK the eye height, 

 beard white. 



Thorax brownish black with usual thin pollen, more distinct in 

 front. Scutellima brown with four pairs of bristles, the median pair 

 of the same appearance as the others. The disk has about a dozen 

 depressed small bristles. Calypters brown. Stemopleurals 4 on one 

 side, 5 on the other. 



Abdomen black, with faint reddish tinge at the sides; third segment 

 with only a very narrow basal interrupted, white, pollinose crossband, 



• A note on tbis material occurs in Brauer and Bergenstamm, Zweifl, Kais. Mus., pt. 7, 

 1894, p. 580. 



