NORTH AMKRICAN IIYMENOPTERA. 313 



7. Pcinpliredoii l»ii»«rti<>r n. sp. 



9. — Anterior margin of the clypeus in the middle eniarKinate; front with 

 strong close punctures ; top of head and cheeks punctured like inornatiia. Head 

 from above nearly quadrate, longer than in inornntus, and is possibly a little 

 more narrowed behind; third joint of antenme barely one-third longer than 

 the fourth; ocelli rather strongly pitted, the anterior one much the smallest: 

 dorsuluni with large, not very sparse punctures, whicli are most compact and 

 less strong anteriorly; enclosed space on metanotuni larger than in inornatus, 

 and is more triangular, the rugse somewhat similar, hut are of course longer, the 

 smooth space divided into two parts by a furrow, the parts together form a nar- 

 row lunule; the posterior face with very coarse, close punctures, which are not 

 broken into rugse as in inornatus ; petiole of abdomen about as long as the hind 

 coxae and trochanters united, at any rate not longer. Abdomen shining, the 

 last dorsal segment not furrowed, but i)resenting a flat appearance; colored as 

 usual. Length 5.5 — 6 mm. 



Texas (collection U. S. Nat. Mus.). Two specimens froii) Di.'^trict 

 of Colutnbia, which probably belong to another species, though at 

 the present time I feel doubtful al)out their distinctiveness; they 

 are much larger and appear intermediate between bipartior and 

 inornatus. 



8. I'einphredoii tonax n. sp. 



9 .—Anterior margin of the clypeus in the middle produced into a sharp tooth 

 or projection ; although the punctures of the front are strong and close, thev are 

 neither as strong or as close as in cither of the two preceding species. Head 

 from above almost quadrate, scarcely narrowed behind ; third joint of antennfe 

 barely one-third longer than the fourth ; dorsulum, except tlie extreme basal 

 portion, almost inipunctate; rugse of enclo.sed space oti mctanotnm longitmlinal, 

 though somewhat irregular, and are finer and closer than in the two precedin'^ 

 species; the smooth space hroadly lunulate, divided by a furrow, the posterior 

 face strongly rugose or rugged, the hind tarsi stouter than usual ; petiole of ab- 

 domen aljout as long as the hind coxse and trochanters combined, not as long as 

 the first joint of the hind tarsi. Abdomen shining, tiie segments rather dis- 

 tinctly ]>unctured on apical half, the last dorsal segment not furrowed, though 

 somewtiat depressed and with large punctures; of the usual color; ))ul)esceuce 

 very sparse. Length 7 — 8 mm. 



%. — Anterior margin of the clypeus emarginate in the middle; front with 

 large, not very close punctures, third joint of antennffi but little longer than the 

 fourth, joints 6-10 rounded out beneath. Head from above distinctly narrowed 

 behind, not by any means twice as broad as it is long in the middle : dorsulum 

 sparsely punctured anteriorly, inipunctate on remaining portion ; enclo.sed space 

 on raetanotum with irregular rugse, the smooth space narrower than in the fe- 

 male. Abdomen shining, with fine, but distinct punctures. Wings subhvaliue, 

 slightly fuscous on apical portion. Length 6 mm. 



Canada, Virginia, Illinois, Colorado, Washington. 



TR.\NS. .\M. ENT. SOC. XIX. (40) DECEMBEK, 1892. 



