AET. 8 REVISION OF THE FLY GENUS BELVOSIA ALDEICH 45 



cinereous reflections, the anal segment wholly of that color; the abdomen some- 

 what transparent. 



Length, 10.5 mm. 



Face and sides of the front silvery-white; front much broader than the eyes; 

 frontal band and vertex rufous; frontal bristles forming on both sides three rows, 

 the inner row descending to the end of the second antennal joint; the bristles of 

 the intermediate row shorter and weaker; oral margin not prominent; above the 

 vibrissae are four bristles on the facial ridges; cheeks without black hairs; beard 

 and pilosity of the occiput whitish; eyes bare, a row of short black bristles behind 

 them. Antennae longer than in the preceding species; basal joints rufous; third 

 joint black, with rufous base; second joint elongate, bristly; third joint twice as 

 long as the second; arista indistinctly jointed, thickened to near the tip. Pro- 

 boscis blackish; palpi rufous, thickened toward the end. Thorax blackish, before 

 the transverse suture with whitish-grey tomentum and two black lines; pleurae 

 greyish; scutellum testaceous. Abdomen short ovate, very convex; first segment 

 black; second segment blackish, with grey reflections and a white front margin, 

 laterally rufous, shghtly transparent; third segment yeUowish-grey, with brown 

 reflections on the hind margin; anal segment short, pale ochraceous; macrochaetae 

 as in the preceding species. Legs black; shorter and more robust than in C. 

 onusta, but with similar bristles; foot-claws and pulvilli short. Tegulae white. 

 Wings brownish-grey, intense yellow at the base; venation like that of C. onusta. 



Hab. Mexico, Teapa in Tabasco (H. H. Smith). 



A single female example. 



Although it is clear that this species belongs to Belvosia, I have not 

 been able to identify it in the material seen. 



BELVOSIA ANALIS Macqnart 



Belvosia analis Macquart, Dipt. Exot. Suppl., vol. 1, 1846, p. 160, pi.- 14, fig. 

 4.— GiGLio-Tos, Ditt. dell Mess., vol. 3, 1894, p. 29. 



Originally described from Brazil, the type now presumably destroyed. 

 Giglio-Tos identified a specimen from Tuxpango, Mexico, and Coquil- 

 lett identified Mexican material as belonging to this species; but the 

 original description says that the abdomen is blue, which seems to 

 exclude it from this genus entirely, as none of the known species of 

 Belvosia have this peculiar color. I have described Coquillett's species 

 as cUiata. 



BELVOSIA AURULENTA Biffot 



Frontina aurulenta Bigot, Annales Soc. Ent. France, 1888, p. 84. 

 Willistonia aurulenta Beauer, Sitzungsber. Kais. Mus., vol. 106, 1897, p. 366. 



The type is a female from Brazil, and has been examined by Brauer, 

 who referred it to Willistonia. I do not find either in his remarks or 

 in the original desciption the necessary characters to connect the 

 name with any of my species. 



o 



