358 AMERICAN HYMKNOPTERA. • 



elypeus, and an elevated ridge between them ; clypeus with a sharp ontward- 

 cnrved central spine ; thorax closely and rather coarsely punctured ; without 

 parapsidal grooves ; transverse aciculations in front of scutellum strongly curved 

 with convex side toward scutellum ; seutellnra flat, punctured and without cen- 

 tral groove ; metathorax strongly reticulate and with scarcely a median longitu- 

 dinal depression ; abdomen long, slender, strongly compressed ; wings fuscous, 

 nervures brown, stigma slender and flesh color ; third discoidal strongly narrowed 

 at base; humeral cross-vein in hind wing broken above the middle. 



Two sjjecin.'ens from Brookings, S. Dak. (Prof. Aldrich), and 

 Franconia, N. H. (Mrs. SlQs.son). 



Aiioinaloii bipartitana n. sp. 



1) . — 24 mm.; antennai 18 mm. and about 65-jointed. Enfons, with vertex, 

 occiput, dorsum of jirothorax, stripe on the three lobes of mesonotum, sternum, 

 small diagonal stripe on upper posterior mesopleurse, metasternum. lower anterior 

 portion of metapleurse, basal suture of metanotum, dorsum of second abdominal 

 segment, three apical segments, posterior coxse, basal trochanters and ape.x of 

 hind tibiiB, black; posterior femora piceous; face, anterior orbital lines, scape 

 beneath, mouth-pai'ts, cheeks, scutellum, four anterior legs, posterior tibiae except 

 apex, apical trochanters and tai'si of hind legs, yellow ; antennie fulvous, blackish 

 at base; wings yellowish, subhyaiine, nervures reddish brown, stigma color of 

 antennte ; third discoidal strongly narrowed at base ; humeral cross-vein of hind 

 wing broken close above the middle ; head rugose above antennae ; cheeks polished, 

 coarsely but sparsely punctured; face coarsely punctured, but polished; two 

 parallel grooves beneath antenna; distinct and extend to clypeus when they 

 diverge into still stronger grooves around the clypeus, clypeus with central apical 

 tooth and with deep central depression above ; thorax coarsely punctured ; par- 

 apsidal grooves present, reticilate; scutellum oval, with a deep central longitudi- 

 nal groove; transverse aciculations before scutellum, few, straight, bent only at 

 apices; metathorax elongate at apex, strongly reticulate, concave above near 

 apex ; abdomen long, slender, moderately depressed. 



One specimen from Michigan. 



Aiioinaloii subiirbe n. sp. 



9. — 17 mm. Kufous, witli large spot on vertex, occiput, apex of mandibles, 

 prothorax. anterior median stripe on mesonotum, upper posterior angle of meso- 

 pleura, meso- and metasternum, basal portion of metathorax, region around the 

 scutellum, spot on api(-al dorsum of metanotum, dorsum of second abdominal 

 segment, ventral and dorsal portions of segments 4-6, inner basal portion of pos- 

 terior coxae, upper portion of basal posterior trochanters and apical fifth of poste- 

 rior tibiae black; antennae short, 44-jointed, reddish brown, paler beneath toward 

 base, four anteri(jr tibiae and all of the tarsi yellow; wings hyaline, nervures 

 brown, stigma rufous ; third disc(jidal cell not narrowed at base ; second recurrent 

 nervure strongly bent in the middle ; submedian cell slightly longer than median 

 on externo-median nervure; head and thorax coarsely punctured, pilose ; face 

 broadly concave, clypeal groove shallow, clypeus with a median tooth strongly 

 curved outward ; scutellum punctured, oval and not aciculate in front of it; no 

 parapsidal grooves: metathorax rugose, but not or indistinctly reticulate and 

 without median depression ; abdomen slender, compressed, slightly oval; petiole 

 scarcely broadened behind the spiracles; legs slender. 



