MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^. 283 



second stouter, obconic; third and fourth about equal, obconie, but 

 longer than the second; the three following joints bell-shaped, loosely 

 joined, the last conical, longer than the preceding. Thorax with tsvo 

 deep furrows. Teguls piceous. Wings hyaline. Abdomen a little more 

 than three times the length of the thorax, very long and acute, and 

 strongly compressed from above and below; when viewed from the side, 

 knife-shaped. 



Habitat. — Washington, D. 0. 



Type in Coil. Ashmead. 



Described from a single specimen collected by Mr. E. A. Schwarz. 

 The very strongly depressed or flat abdomen and the length of the 

 antenna] joints at once separate this species from all other described 

 forins, an<l I am not certain but that they are of sufficient imjjortance 

 to establish a new genus. 



Polymecus auripes, sp. nov. 



9. Length,!""". Black, shining; the head opaque, closely, micro- 

 scopically punctate; antennai and legs bright golden yellow. Thorax 

 without furrows, or these only faintly indicated posteriorly; scutellum 

 pubescent, foveated across the base and terminating in an awl-shaped 

 spine; metathorax and base of abdomen densely pubescent. Teguhp 

 prominent, black. Wings hyaline, i)ubescent. Abdomen a little longer 

 than the head and thorax united, gradually contracted into a tail from 

 the apex of the second segment; the third segment one-half the length 

 of the fourth; the fifth twice as long as thick, and as long or a little 

 longer than the third and fourth segments united; the sixth or last 

 segment conical, a little longer than the fifth. 



Habitat. — Virginia. 



Type in Coll. Ashmead. 



The small size and the color of the legs sufficiently distinguish the 

 species. 



Polymecus alnicola, sp. nov. 



S 2 . Length, 1.4 to 1.8" '". Black, shining, the head and dorsum of 

 thorax finely, microscopically punctate. Head transverse. Mandibles 

 piceous. Antenna^ 10-jointed, black, the tip of the pedicel honey- 

 yellow; the flagellum is about twice as long as the scape; pedicel 

 twice as long as thick; first funiclar joint slender, slightly longer than 

 thick; second twice as long <as thick, stouter; third and fourth about 

 equal, slightly thicker than the second; club joints, except the last, 

 equal, a little longer than thick, the last cone-shaped, slightly longer 

 than the preceding. Mesonotal furrows complete, the middle lobe not 

 projecting on to the scutellum, the lateral lobes with no tufts of pubes- 

 cence at base. Scutellum highly convex, subopacpe, the tip with the 

 tubercle subobsolete. Metathorax sparsely pubescent. Legs black, 

 tips of anterior femora, their tibia^ and base and tips of mi<ldle and 

 posterior tibia?, and all tarsi honey-yellow. Wings hyaline. 



