1898.] NATURAL SCIENCES OF PHILADELPHIA. 55 



hind, with shining white hair ; otherwise the pubescence of the 

 femora, as of the tibia?, is black. Tarsi with partly black and partly 

 pale hair, that on the inner side of the first four tarsi shining ferru- 

 ginous; small joints of tarsi a lively ferruginous. Teguloe black or 

 piceous. Wings dusky hyaline. Apex of abdomen bidentate. 



Hab. — Olympia, Wash., July 3rd, at flowers of Syringa; also 

 June 27th, (T. Kincaid). Nearest to P. simillimus (Cress.), but 

 differs by the wholly black scape and the distribution of the pubes- 

 cence. 

 Megaohile calogaster n. sp. 



$. — Length 1 1—12 J mm., stoutly built, black, with pubescence 

 varying from pale ochraceousto whitish, not dense enough on thorax 

 to conceal the surface, some short black hair on cheeks just behind 

 eyes, and a good deal on the middle of the mesothorax. Head 

 ordinary ; a conspicuous patch of white hair on lower part of cheek ; 

 face quite densely clothed with yellowish-white hair ; vertex strongly 

 punctured, as also the clypeus ; antennas wholly dark, last joint oval 

 and flattened ; mandibles black, elbowed without, tridentate ; thorax 

 strongly and closely punctured ; anterior coxce with a large rather 

 broad and blunt spire, above which is a transverse patch of the most 

 brilliant orange-rufous pubescence; anterior femora stout, sub- 

 trigonal, ferruginous with a black patch at base and apex within, 

 the latter connecting with a broad black external stripe extending 

 the whole length of the femur ; under side of anterior femur with 

 long snow-white pubescence; anterior tibia short and thick, black 

 without, mostly ferruginous within, a large apical triangular patch 

 without pale yellow, apex with a blunt pale yellowish tooth extend- 

 ing at right angles to the axis; anterior tarsi pale yellow, tinged with 

 ferruginous toward the end; first joint hollowed, produced at the end, 

 but not extending as far as tip of second joint ; second and third 

 joints broadened, and elongated at one side; anterior tarsi behind 

 fringed with long white hair ; middle and hind legs entirely black, 

 their femora and tibiae with scanty whitish pubescence, partly black 

 on hind legs, their tarsi with shining orange-fulvous hair; claws 

 with the basal half ferruginous, the apical half black ; tegulaa black, 

 punctured ; wings tinged with fuliginous, nervures black, marginal 

 cell quite long and narrow ; abdomen short and convex, without any 

 hair bands, but having rather long thin pubescence, nowhere con- 

 cealing the surface, grayish-white or pale ochreous on the first two 



