March, 19 1 7-] CoLE : OSTEN SaCKEn's GrOUP " PcECILANTHRAX." 79 



Head pale yellow, venter and occiput black. Dorsum of abdomen and 

 thorax grayish black. A red spot on the sides of the second and third ab- 

 dominal segments. Frons wide, reddish in front of vertex. Frons and oral 

 margin with black pile. Cheeks and face with short yellow pile. Scutellum 

 dull red, the base black. Straw yellow tomentum and pile on thorax and 

 abdomen. Bristles yellow. Legs reddish yellow, the base of front femora, 

 tarsi, tips and innersides of tibiae black. Bristles of legs black. Venter and 

 body black. Black pile on margins of all except first segment, tufts of black 

 pile on the posterior corners. Black tomentum on base of scutellum. Pro-^ 

 boscis barely reaching oral margin. First joint of antennae reddish, the second 

 and third black (fig. 13). Wings brown, but the color is not sharply defined. 

 No clouds on ends of the branches of the third vein or on the end of the 

 second vein. Most of the axillary cell smoky hyaline, and discal cell with 

 large hyaline spot. A light streak in base of marginal cell, the end of first 

 basal and most of second basal cell yellowish. The end of first posterior and 

 most of the second, third and fourth posterior cells smoky hyaline (fig. 22). 

 Length 15 mm. Wing 17 mm. 



Type. — Loew's type was from California. 



There are two specimens in the National Museum from CotuUa, 

 Texas, May 12, 1906 (F. C. Pratt.), and one specimen from Texas, 

 with no data. These specimens are remarkable for the spurious 

 veins and stumps of veins in the wings. 



The status of this species has been in question for some time. 

 Osten Sacken was not sure of certain of his species which he placed 

 under ftiUginosa. Coquillett made fuliginosa a variety of alpha O. S. 

 or a variety of what he considered was alpha. Osten Sacken re- 

 ferred to fuliginosa a specimen from N. Sonora and one from Texas 

 (Coll. von Roder). Coquillett stated that "fuliginosa differs from 

 the typical alpha in that the outline of the brown color of the wings 

 is not well defined, the parts of the wing that in alpha are pure hya- 

 line are here blackish gray and the veins between the submarginal 

 and posterior cells are not distinctly bordered with brown." In a 

 note he adds " this is but an immature form of alpha." 



Coquillett had six specimens from California and Texas. From 

 his description an,d the size of the species (10-13 mm. in length) it is 

 very probable that the specimens from California are those which I 

 describe as A. pilosa n. sp. Mr. Nathan Banks compared my Texas 

 specimens with Loew's type (which is rubbed) and finds my deter- 

 mination to be correct. 



