178 D. W. COQUILLETT. 



41. Antlirax |>lago$<»a n. sp. — Black, sides of face and legs somewhat red- 

 dish. Front and face reddish tonientose and black pilose : face slightly retreating 

 below; proboscis projects half its length beyond epistonia ; first two joints of. 

 antennpe of nearly an eqnal length, the third joint subglobular at its base, 

 the stylifonn portion slender, linear, and about as long as rest of antennse; 

 occiput yellowish tomentose. Thorax reddish tomentose, sides and front end 

 yellowish pilose, bristles of hind angles black; pleura above yellowish pilose, 

 that beneath root of each wing partly white; breast largely black pilose; scu- 

 tellum black, yellowish tomentose, the pile and bristles black. Abdomen black 

 tomentose, that on fii'st segment, bases of second, third and fourth, and all of the 

 tifth and following segments yellowish; pile of sides of first two segments 

 abundant, yellowish ; of the other segments rather sparse, black and yellowish ; 

 venter black and yellowish pilose. Legs yellowish and black tomentose, front 

 tibife provided with bristles, claws of front tarsi well developed. Wings hyaline 

 at the apex, the base blackish-brown, the outline of this color extends from near 

 apex of auxiliary vein transversely to second vein, then basally a short distance, 

 then transversely to discal cell, then basally nearly to small crossvein, then 

 almost straight to apex of axillary cell, which is wholly brown ; veins at bases 

 of first submarginal, first and fourth i)osterior cells narrowly l)onlered with 

 whitish-hyaline. Length 8-30 mm. 



Arizona ! Four specimens. 



42. Ailthra.'K ]>ai'vi<*Oi*iiis Loew. — Differs from plagusa only in that the 

 first two anteunal joints, apex of scutellum and of the abdomen is reddish and the 

 apical half of the axillary cell is hyaline. Length 9 mm. 



Illinoi.s, Louij^iana ! Three specimens. 



43. Aiitlirax iiiis;ator u. sp. — Front black, yellowish below, brownish 

 tomentose and l)lack pilose; face yellowish, considerably produced below, yel- 

 lowish tomentose, that on hyperstoma black; proboscis projecting length of 

 lahellsB or le.ss beyond epistoma ; first two joints of antennse reddish, the first 

 twice as long as the second, third joint black, very elongate-conical at its base ; 

 occiput white tomentose, that in middle above yellowish. Thorax black, brown- 

 ish tomentose, middle of dorsum black pilose, sides and front end yellowish 

 l)ilose, bristles of hind angles yellowish ; ])leura yellowish pilose, that beneath 

 root of each wing white; scutellum reddish, its base more or less black, yellow- 

 ish tomentose, the bristles reddish. Abdomen blac^, the sides sometimes marked 

 with reddish, yellowish tomentose, sometimes largely whitish, that on apices of 

 second, third and fifth segments black, becoming less extended on each succeed- 

 ing segment; last segment and middle of the preceding one whitish tomentose ; 

 pile on sides of abdomen long and abundant, yellowish; that on sides of fifth 

 and sixth segments, and usually of the second also, largely black ; several black 

 pile on dorsum of abdomen posteriorly ; venter reddish, yellowish tomentose, 

 that on bases of last three segments black. Legs reddish, yellowish tomentose, 

 front tibite destitute of bristles; tarsi black, claws of front tai'si minute. Wings 

 hyaline at apex, the base brown, the outline of this color extending from near 

 apex of auxiliary vein transversely to second vein, then curving to third vein 

 near base of its anterior branch, then curving to fourth vein near apex of discal 

 cell, then basally to last third of this cell, then curving zigzag through third 

 posterior cell to fifth vein near its apex, then curving basally to penultimate vein 

 near its apex, following this vein basally to base of fourth posterior cell, then 

 curving to hind margin at last third of axillary cell ; extreme base of wing, 



