222 AMERICAN HYMENOPTERA. 



punctured and with lateral carinse ; basal segment of abdomen long, somewhat 

 oval but not undulating, longitudinally rugulose, carinate ; second segment lon- 

 gitudinally aciculate on basal three-fourths, apical fourth and remaining seg- 

 ments polished; compressed from apical portion of third segment; segments 2 

 and 3 with diagonal impressions at base. 



9 .—Differs in having the face blackish to the clypeus, and in having the ab- 

 domen strongly compressed from base of third segment. 



Two specimens from Michigan and Illinois (Dr. Nason). Types, 



coll. G. C. D. 



TAPIKOPS Foerster. 

 (Synop. der Fam. und Gatt. der Ichn., 1868.) 

 Tapiiiops emarginatus Say {Ophion), Lee. Ed. i, 380. 

 Exochiscus pusillus Walsh, Trans. St. Louis Acad, iii, 97, % . 

 Orthocentrus abdominalis Prov.. Faune Ent. Can. ii, 435. 9 % . 

 Orthocentrus californicus Ashm., Proc. U. S. Nat. Mus. xii, 442, 9 • 

 '^ 9. — 3 mm. Black, with legs and antennse from honey-yellow to reddish 

 brown ; face dark to pale piceous ; orbital spots above antennae, palpi and tegulse 

 whitish; apex of abdominal segments 2 4 more or less rufo-piceous, sometimes 

 segments 2 and 3 are dark piceous; wings hyaline, nervures and stigma pale 

 brown; areolet pentangular; metathorax and basal segment of abdomen with 

 distinct carinse, and with the second abdominal segment are granularly sha- 

 greened and somewhat rugulose ; face with transverse rows of setigerous tuber- 

 cles; head slightly broader than long; tiagellum with short, thickset segments; 

 abdomen much more strongly compressed in 9 tlian in % . 



Many specimens from Canada, Massachusetts, New Hampshire, 

 Michigan, Illinois, Mt. Hood, Oregon and Placer County, Cala. 



ATMETUS Foerster. 

 (Synop. der Fam. und Gatt. der Ichn., 1868.) 



Thorax and head largely reddish brown ; body large valiforilicus Ashm. 



Thorax black ; body moderate. 



Second abdominal segment polished, except at extreme base-nigritus Ashm. 

 Second abdominal segment shagreened, rugulose cariiiatus Prov. 



Atmetus CHliforniciis Ashm.. Trans. Amer. Ent. Soc. xxiii. 204. 



9 . — 5 mm. Legs, prothorax, antennae, most of head, mesothorax and median 

 segments of abdomen brownish ferruginous; rest black to piceous, polished ; two 

 basal segments of abdomen aciculately rugose longitudinally ; metathorax areo- 

 lated ; wings hyaline, areolet large. 



Two specimens from California (coll. Ashmead). 



Atuietlis iiigritus Ashm., Trans. Amer. Ent. Soc. xxiii, 204. 



9. — 2-3 mm. Black, with extremities and joints of legs more or less piceous 

 or pallid ; point beneath antennte, elongate stripe on scape and tegulffi, whitish ; 

 wings hyaline, nervures and stigma pale, areolet small ; face aciculately tubercu- 

 late on upper portion ; metathorax areolated ; abdomen strongly compressed ; 

 basal segment and extreme base of second longitudinally aciculate ; rest of ab- 

 domen highly polished. 



Five specimens from Ohio (Ashm.) and Illinois (Dr. Nason). 

 Type, coll. Ashmead. 



