282 AMERICAM HYMENOPTERA. 



base; head, and especially face, coarsely punctured ; thorax short, inflated ; par- 

 apsidal grooves plain, shallow and extending into a broad, shallow, rugose de- 

 pression before scutellum ; scutellum irregularly oval, rugose and coarsely punc- 

 tured ; metathorax with large, high carinpe, the areas between them often 

 reticulate; abdomen sessile, broadly oval, pilose; basal segment- with strong 

 carinse reaching to the transverse depression which is distinct on this and the 

 next segments near the apex ; legs rather small and short. 



One specimen from Gaylord, Mich, (type, coll. G. C. D.). 



Tryplioii seiniiiiger Cress., Proc. Ent. Soc. Phil, iii, 278. 



Tryphon pe.diadatus Prov., Add. Faune Hymen. 102. 



Metopius terminalis Ashm., Proc. U. S. Nat. Mus. xii. 438, % . 

 9 %. — Black; abdomen rufous, often black or dusky at apex in %, petiole 

 black, rufous at apex : legs rufous, coxse black, and usually apex of hind femora 

 and tibiae dusky; clypeus and mouth-parts yellowish white; antennse reddish 

 brown; wings subhyaline. nervures and stigma brown, paler at base; stigma 

 thick, lanceolate; areolet oval, petiolate; transverse median nervure uniting 

 back of basal; head shagreened, pilose, disc-shaped ; face oval, with thick silvery 

 pile and with median prominence from which thei'e projects a small tooth on the 

 upper side; clypeus thick, with strong median transverse carina : thorax strong, 

 polished, finely punctured, pilose: parapsidal furrows indicated anteriorly; scu- 

 tellum broad, shelving, rectangular with axdcal corners slightly rounded and 

 lateral margins with elevated carina ; a longitudinal median carina is also usually 

 present: metathorax completely areolated, the posterior median area with median 

 longitudinal carina; abdomen beyond second segment polislied, finely punctured ; 

 first two segments coarsely ]iunctured ; second segment with oblique grooves at 

 base ; petiole but slightly narr(jwed at base and with strong cariuje nearly to the 

 apex ; ovipositor slightly exserted. 



Sixty-one specimens from Massachusetts, Illinois, South Dakota, 

 Montana, Colorado, Nevada, Washington, Oregon and Southern 

 California (type, coll. Amer. Ent. Soc). 



TrypliOii communis Cress.. Trans. Amer. Ent. Soc. ii, 103. 

 Tryphon dionnei Prov., Faune Ent. Can. ii, 414, 9 • 

 9 ^ . — 6-9 mm. Black, abdomen usually rufous with petiole black at base, but 

 varies from this to having tlie abdomen almost entirely black : clypeus is entirely 

 yellow, often black at base in 9 : mandibles and palpi yellow, tegulse variable; 

 legs rufous, with bind femora and tibiae at apex dusky, sometimes the tibiae have 

 a yellowisii annulus ; wings subhyaline, nervures and stigma brown, pale at base ; 

 apical segments of abdomen often narrowly margined with white or yellow. 



Seventy specimens from New Hampshire, Massachusetts, Maine, 

 Connecticut, New York, New Jersey, Pennsylvania, Canada, Mich-. 

 igan, Illinois, Kansas, Montana, Colorado, Nevada, Washington and 

 So. California (types, coll. Amer. Ent. Soc). 



Var atripes differs in having tlie posterior legs entirely black orpiceous: 

 abdomen rufous with base of petiole black and sometimes apical segments black. 

 Eour females and sixteen males from Illinois, South Dakota, Mon- 

 tana, Colorado, Oregon and New Hampshire (types, coll. Davis and 

 Amer. Ent. Soc). 



