ABT. 8 REVISION OF THE FLY GENUS BELVOSIA ALDBIOH 33 



length of the second antennal joint; antennae brownish black, the 

 third joint three times the second; palpi yellow. 



Thorax black, the gray moderately dense with faint stripes. Scu- 

 tellum with pollen of the same color as the thorax but more dense. 



Abdomen black, second segment with a very narrow interrupted 

 basal pollinose band of pale yellow; third and fourth segments with 

 dense yellow pollen, the apical fifth however shining black. Geni- 

 talia small, shining black, the outer forceps concolorous, with roimded 

 tips. 



Legs black; front pulvilli slightly shorter than the last two tarsal 

 joints; hind tibia on outer side without cilia, but with a scattered 

 row of bristles of increasing size on the upper three-fifths. 



Wings light brown, both calypters white, with only a slight tinge 

 of yellow. 



Female. — Front at vertex 0.37 to 0.40 of the head width, the para- 

 frontal silvery below, but with a larger dark region above than in 

 the male. 



Described from six specimens of both sexes. Three males and two 

 females, including type and allotype, were reared by C. T. Greene at 

 Falls Church, Va., from a lepidopterous pupa (Hopkins 14802 F) ; 

 one specimen from Georgia which was figured in Howard's Insect 

 Book (1902, plate 22, fig. 15) as Belvosia bifasciata; the remaining 

 specimen, a male, was sent for study by the American Museum of 

 Natural History; it was bred at Brooklyn, N. Y., by J. Akhurst, host 

 not given. 



Type— Mole, Cat. No. 40478, U.S.N.M. 



BELVOSIA TOWNSENDI, new gpeciei 



Male. — Front at vertex 0.32-0.36 of the head width, continuing 

 forward quite perceptibly before becoming wider; paraf rentals very 

 distinctly yellow pollinose, the ground color showing through very 

 little except quite far back. The bristles are in three irregular rows, 

 the smaller hairs below them and on the cheeks are very distinctl}'^ 

 black. Face, paraf acials, and cheeks as well as posterior orbits silvery 

 pollinose. Antennae black, junction of second and third segments 

 reddish, the third fully twice as long as the second, with almost par- 

 allel sides. Vibrissae about as far above the epistoma as the length 

 of the second antennal joint. Facial ridges with smallish erect bristles 

 not quite to the level of the arista. Just outside the bristles there 

 are also some distinct black hairs. Palpi yellow; beard white. 

 Thorax black, gray pollinose in front, the scutellum, except the base, 

 with yellowish pollen. 



Abdomen black, the second segment with a distinct but very nar- 

 row and widely interrupted basal whitish pollinose crossband. Third 



