MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^. 283 



seooDd stouter, obconic; tliiid and fonrtli about equal, obeonio, but 

 hmger tlian tlie second; the three following joints bell-sha]»ed, loosely 

 joined, the last conioal, longer than the preceding. Thorax with two 

 deep furrows. Teguhe piceous. Wings hyaline. Abdomen u little more 

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

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

 knife-shai)ed. 



Habitat. — Washington, D. C. 



Type in Coll. Ashmead. 



Described frcmi a single specimen collected by Mr. E. A. Scliwarz. 

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

 anteniial joints at once separate this s])ecies from -ill other described 

 forms, and I am not certain but that they are of suffl<'ient importance 

 to establish a new genus. 



Polymecus auripes, sp. nov. 



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

 scopically i)unctate; anteniiiB and legs bright g(>ldeu yellow. Thorax 

 without furrows, or these imly faintly indicated posteriorly; scutellum 

 l)ubescent, foveated across the base and terminating in an awl-shaped 

 si)ine; meta thorax and base of abdomen densely pubescent. Tegula? 

 prominent, bla<k. Wings hyaline, pubescent. Abdomen a little longer 

 than the head and thorax united, gradually c<mtracted into a tail from 

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

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

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

 segment <<)i!;»cd, a little longer than the fifth. 



Hauitat. — Virginia. 



Type in Coll. Ashmeatl. 



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

 species. 



Polymecus alnicola, sp. nov. 



$ ? . Length, 1.4 to 1.8"™. Black, shining, the head and dorsum of 

 thorax finely, microscopically punctate. Head transverse. Mandibles 

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

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

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

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

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

 cijual, a little longer than thick, the last cone-8hai>ed, 4iglitly longer 

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

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

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

 tubercle subobsolciC. Metathorax sparsely pubescent. Legs bla<'k, 

 tips of anterior femora, their tibia^ and base an<l tips of middle aud 

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



