ART. 8 REVISION OF THE FLY GENUS BELVOSIA ALDEICH 35 



William Palmer; one male, Falls Church, Va. (Greene) ; and one male 

 from Riley County, Kans., in the University of Kansas collection. 



Type— Male, Cat. No. 40466, U.S.N.M. 



Named in honor of Dr. C. H. T. Townsend, a very keen and 

 experienced collector of the muscoid flies. 



BELVOSIA BICINCTA Robineau-DesYoidy 



Belvosiabicincta Robineau-Desvoidt, Myodaires, 1830, p. 103. — Williston, 

 Trans. Anier. Ent. Soc, vol. 13, 1886, p. 302. — Townsend, Trans. Amer. 

 Ent. Soc, vol. 19, 1892, p. 89; Ann. and Mag. Nat. Hist., vol. 19, 1897, 

 p. 33. — F. H. Snow, Kans. Univ. Sci. BuU., vol. 2, 1903, p. 217.— Johnson, 

 Proc. Acad. Nat. Sci. Phil., vol. 46, 1894, p. 278; Bull. Amer. Mus. Nat. 

 Hist., vol. 41, 1919, p. 436. 



Senomeiopia bicincta Macquart, Hist. Nat. Dipt., vol. 2, 1835, p. 112. 



Belvosia bifasciata Fabricius (part), Macquart, Dipt. Exot., pt. 2, No. 3, 

 (Mem. Soc. Sci. et Arts Lille, 1843), p. 212 (sep. 55). — Osten Sacken, Cat, 

 N. A. Dipt., 1878, p. 153.— Van der Wulp, Tijdsch. v. Ent., vol. 26, 1883, 

 p. 23. — CoQUiLLET, Revis. Tachinidae, 1897, p. 84. 



Belvosia piurana Townsend, Proc. U. S. Nat. Mus., vol. 43, 1912, p. 349. 



Male. — Front 0.27 to 0.32 of the head width at vertex, widening 

 rapidly after a short distance ; frontals in two irregular rows, one 

 containing the largest bristles is rather distinct ; parafrontals densely 

 covered with dark hau* which inclines toward the median line above, 

 while on the lower part it becomes somewhat more proclinate espe- 

 cially near the orbits. The parafrontals are almost silvery pollinose 

 at the lower end, but the pollen rapidly becomes thinner upward 

 and in their middle and upper portion they are dark and subshining- 

 Face, parafacials, cheeks and posterior orbits silvery white pollinose. 

 The face is a little less glistening. The hairs immediately below the 

 frontal bristles and those of the cheek are black. Antennae brownish 

 black, smaller than in related species, reaching a Uttle more than half 

 of the distance to the oral margin ; second joint somewhat elongated, 

 from one-half to two-thirds the length of the third. The vibrissae 

 are a little higher above the oral margin than in any of the related 

 species, although some have nearly the same distance. Facial ridges 

 bristly up to about the middle of the third antennal joint, somewhat 

 less than half of the total height. Palpi unusually yellow; beard 

 white. 



Thorax black, becoming brown behind, anterior portion with thin 

 gray pollen. Scutellum shining brown. 



Abdomen black, frequently with a trace of red in the ground color 

 of the sides; second segment with a narrow basal pollinose band of 

 gray or pale yellow interrupted in the middle; third segment with a 

 much broader band of the same color, which is very slightly or not 

 at all interrupted; fourth segment with denser and usually deeper 

 yellow pollen on the basal two-thirds or three-fourths, the apex, how- 



