AST. 8 REVISION OP THE FLY GENUS BELVOSIA ^ALDEICH 21 



from Illinois (Forbes). From Prof. Jas, S. Hine were received 1 

 specimen from West York, Miss., and 16 from Ohio, collected by him 

 at Sandusky, Jefferson, Ira, Fort Ancient, Columbus, and Cincinnati. 

 From the American Museum were received one specimen from Forest 

 Hill, N. J. (Weidt); one. Valley of Black Mountains, N. C. (Beuten- 

 miiller) ; one from Mount Vernon, N. Y. (Weidt). The last is a male 

 without orbitals but agreeing otherwise and no doubt belonging to 

 this species. 



This species has been reared from the army worm several times, 

 first by Riley (the type of Exorista jlavicauda) . Sherman has pub- 

 Hshed some notes on this habit in the Journal of Economic Ento- 

 mology (vol. 8, 1914, p. 299). We have no other host record. 



The type was from Philadelphia, in the Dejean collection. 



BELVOSIA OMISSA, new species 



Male. — Front broad, 0.40 of the head width at vertex (the same in 

 four specimens), narrowest at the level of the front ocellus, evenly 

 widening to the lower part of the face. Parafrontals shining dark 

 gray, gradually more pollinose toward the frontal stripe, the frontal 

 bristles in three irregular rows; no orbitals, a few dark hairs below 

 the lowest of the bristles. Parafacials silvery-white, the face more 

 pure white, cheek nearly half the eye height, thickly covered with 

 dark hairs; facial ridges rather ^flattened, strongly bristled nearly to 

 the arista. Vibrissae not very much above the edge of the mouth, 

 the distance equaling hardly more than half the second antennal 

 joint. Antennae black, the second joint rather reddish-brown, the 

 third fully four times the second. Arista tapering from near the 

 base, apical portion slender. Palpi brown; beard white. 



Thorax black, including scutellum; the dorsum gray pollinose, 

 leaving four shining black stripes very perceptible to the naked eye, 

 the inner pair extending only a short distance behind the suture; a 

 short dark median stripe just before the scutellum. 



First three segments of abdomen black with rather a uniform gray 

 pollen, which, however, is slightly changeable in some lights; fourth 

 abdominal segment entirely deep orange pollinose on same ground 

 color. First segment without median marginals; second segment 

 with one pair; third segment with a marginal row of about 14; fourth 

 segment with a subapical row of about 10, and rather numerous black 

 hairs scattered over the pollinose surface. Genitalia small, the inner 

 forceps short, black; the outer forceps yellow and considerably 

 swollen, about as long as the inner. 



Legs black, front pulvilli shorter than last tarsal segment, the 

 other pulvilli small. Hind tibia with a single dense row of rather 

 short cHia on the outer hind side with one stout bristle just beyond 

 the middle. 



