AKT. 8 REVISION" OP THE FLY GENUS BELVOSIA ALDRICH 19 



BELVOSIA WIEDEMANNI. new species 



Male. — Front at vertex 0.33 and 0.34 of the head width, widening 

 almost immediately. Face and parafacials, cheeks and posterior 

 orbits light grayish-yellow pollinose. Parafrontals are the same 

 color anteriorly, posterior part a little darker. Frontal bristles very 

 irregularly placed, hardly in three rows. Hairs of upper parafacials 

 black and coarse, few in number. Hairs of cheek pale and fine. 

 Palpi brownish red ; antennae nearly black, second joint and extreme 

 base of third a little brown. Arista not flattened, tapering to a fine 

 point. Third antennal joint rather long, three times the second. 

 Vibrissae about the length of the second antennal joint, above the 

 edge of the mouth. Facial ridges bristly almost to arista; the face 

 not much depressed. Pollen of mesonotum gray; scutellum subshin- 

 ing black. 



Abdomen almost entirely velvet black above, except the fourth 

 segment which is densely covered with pale yellow pollen to the apex. 

 First abdominal segment without median marginal; second with a 

 single pair; third with a marginal row of 14 or more; fourth with a 

 submarginal row of about 12. 



Legs black, front pulvilli rather large but hardly longer than the 

 last tarsal joint. 



Wing blackish. 



Female. — Front at vertex 0.32 and 0.34 of the head width. 



Length, 10 mm. 



Described from eight males and five females sent from the Vienna 

 Museum, The specimens have evidently been taken out of alcohol 

 and are somewhat shriveled, hence the width of the front may not 

 hold good with fresh specimens. They all bear the same labels 

 "Hetschko 89 Blumenau," "copulata det. B. B."; "Coll. Win them." 



Two males and two females, paratypes, are retained in the 

 National Museum collection, the remainder including the type 

 returned to the Vienna Museum. The species Tachina copulata 

 Weidemann was based upon two specimens belonging to very distinct 

 genera, one of these belonging to the genus Hystricia has already 

 been designated as the type, hence a new name is necessary for the 

 present species. I have discussed the original specimens in these 

 Proceedings (vol. 72. 1927, art. 7, p. 10). 



Paratype. — Male and female. Cat. No. 40564, U.S.N.M. 



BELVOSIA UNIFASCIATA Robineaa-DesToidy 



Latreillia unifasciata Robineau-Desvoidy, Mycdaires, 1830, p. 105. 

 Exorista flavicauda Riley, Second Missouri Report, 1870, p. 51; Gen. Index 



Mo. Repts , p. 88, quoted. 

 Belvosia unifasciata Coquillett, Revis. Tachin., 1897, pp. 10, 84. — Johnson, 



Cat. Ins. of New Jersey, 1899; ed. 2, 1909.— Felt, 21st N. Y. Report, 1905, 



i>. 65. — Johnson, Bull. Amer. Mus. Nat. Hist., vol. 41, 1919, p. 437.— 



Brimley, Ent. News, vol. 33, 1922, p. 21. 



