AMERICAN HYMENOPTERA. 39 



posterior tarsi pale; petiole slender, cylindrical, nearly as long as pos- 

 terior coxse and as long as the remainder of abdomen, which is small 

 and subglobose, polished and black. Length .15 inch. 



2. Sniicra canadensis, n. sp. 



% . — Entirely black; face transversely rugose ; clypeus smooth and polished, 

 piceous ; antennae subrobust, scape cylindrical, not compressed beneath at tip; 

 thorax densely and coarsely sculptured ; apex of scutellum rounded ; meta- 

 thorax coarsely reticulated, with a central ridge furcate before apex ; tegulse 

 piceous; wings hyaline, faintly dusky at tips ; four anterior legs more or less 

 varied with yellowish-brown; posterior femora entirely black, rather larger 

 than in preceding species, the teeth numerous and minute; tarsi pale; abdo- 

 men entirely black, smooth and shining ; petiole stout, shorter than remainder 

 of abdomen and about two-thirds the length of posterior coxae. Length .Iti 

 inch. 



Hub. — Canada. Two specimens. Stouter than microgaster, with 

 shorter antennae, larger posterior femora and shorter, stouter petiole. 



3. Smicra albifrons. 



Chalets albifrons, Walsh, Ins. Inj. Veg. 111. p. 37, fig. 8. 



Hab. — Illinois. This is the smallest species known to me, being 

 only .08 inch long. It is easily distinguished by the large angular 

 white mark on the face. The posterior femora have a whitish streak 

 on the upper basal half of outer side. 



4. Smicra flebilis, n. sp. 



% . — Black, clothed with pale pubescence ; clypeus and mandibles reddish; 

 antenna? long, black, scape piceous, compressed and carinate beneath at apex ; 

 thorax densely and confidently punctured, immaculate; scutellum subconvex, 

 rounded and margined at apex; metathorax coarsely reticulated; tegulse pale 

 brown ; wings slightly dusky, subiridescent ; legs yellowish-ferruginous, coxae, 

 trochanters and base of four anterior femora black; posterior femora brown- 

 black, orange-yellow at base, shading into pale yellow beneath, a pale yellow 

 spot near tip andasmaller one above it, inner side pale orange-yellow with a 

 brown mark on middle curving to apex above, teeth numerous and minute; 

 posterior tibiae black with apale yellowish spot near base ; abdomen subglobose, 

 smooth and polished, piceous, reddish at base and sides, pubescent at apex, pe- 

 tiole black, stout, cylindrical, nearly as long as remainder of abdomen. Length 

 .20 inch. 



Hab. — Massachusetts. Two specimens. Resembles microgaster in 

 form, but is larger, with posterior femora maculate with yellowish, and 

 the abdomen mostly red. 



5. Smicra rufofemorata, n. sp. 



% . — Dull black, head rugose, mandibles tinged with reddish; antennae as 

 long as head and thorax, scape compressed beneath ; thorax immaculate, with 

 dense coarse punctures; metathorax coarsely reticulated, pubescent: tegulse 

 piceous; wings fusco-hyaline ; legs ferruginous, coxae, trochanters, four anter- 

 ior femora at base and beneath, and the four posterior tibiae, black ; posterior 



