210 AMERICAN HYMENOPTERA. 



Choriiiteiis opacitas u. sp. 



9 . — 5.5 mm. Black, pilose, with anterior orbital lines, spot on cheeks beneath 

 eyes, clypeus and mouth-parts, yellow; tegulse and antennae dark brown; legs 

 rufous, apex of posterior femora and posterior tarsi dusky ; posterior coxfe black, 

 piceous at apex ; wings dusky hyaline, nervures and stigma brown, second recur- 

 rent not broken in the middle ; mesonotum finely punctured ; metanotum with 

 six carinse and spiuose at apical corners; metapleurge with short, converging 

 carinfe above coxae ; abdomen finely and about evenly punctured on all the seg- 

 ments: basal segment with five carinae. second with three, the two lateral ones 

 rather small, and the third segment with a faint median carina. 



One .specimen from Nevada (coll. Amer. Ent. Soc). 



Clioriuseus cariniger Walsh (Poli/rhabdus). Trans. St. Louis Acad, iii, 98. 



Chorineeus flavifrons Ashm., Proc. U. S. Nat. Mus. xii, 444, 9- 

 • 9 'h • — 6-7 ram. Black, with face, mouth-parts and tegulae yellow, shaded 

 sometimes with rufous; legs rufous, with four anterior ones and base of posterior 

 tibiae and tarsal segments often paler; posterior coxae soinetimes piceous; wings 

 slightly dusky, nervures and stigma brown ; second recurrent angularly broken ; 

 antennae brown, long, tapering; thorax as in the preceding, six carinae on meta- 

 thorax, the two outer less distinct; abdomen elongate, closely punctured, most 

 so on second segment; basal segment with five carinae; second with three dis- 

 tinct; third with the thi'ee on basal half, sometimes the two lateral ones are 

 wanting on basal half of third segment. 



Three females and two males from Illinois, Michigan, Washington, 

 Connecticut and Wisconsin (Ashmead). Type in U. S. Nat. Mus. 



Choriiiieus oiiiti!« n. sp. 



9 . — 7 mm. Black, robust, with face, cheeks, mouth-parts and scape beneath, 

 lemon-yellow; flagellum reddish brown, paler beneath ; legs rufous, anterior ones 

 paler; four posterior coxae black; posterior femora blackish; posterior tibiae at 

 base pale yellow; wings hyaline, nervures and stigma dark brown ; tegulae black: 

 head thick, distinctly swollen above clypeus; thorax broad, depressed, flat above; 

 mesonotum sparsely punctured and with median longitudinal groove pa.ssing over 

 scutellum to apex; metanotum with six carinae. strongly mucrouate at apical 

 corners; metapleurae longitudinally aciculate on posterior half, except imme- 

 diately beneath the outer carinae, where it is coarsely punctured; mesopleura 

 very finely punctured, striate above middle coxae; abdomen shining, coarsely 

 punctured : four carinae on basal segment, three on the second and same number 

 on basal half of the third segment; in one specimen the median carinaextends 

 onto the basal half of the fourth segment. 



-^ _ — Differs in having the yellow extend farther on the face and cheeks, flagel- 

 lum yellow beneath on basal half, four anterior legs entirely yellow, tegulfe yel- 

 low on basal half, posterior femora ferruginous, having the three carinae extend 

 to the apex of the third abdominal segment and in having the metapleura acicu- 

 late up to the outer carina of metathorax. 



Two females and one male frou) jVIt. Washington, N. H. (Mrs. 

 Slosson). Type, coll. G. C. D. 



