AMERICAN HYMENOPTERA. 103 



Uah. — Colorado, (Morrison). Remarkable for the large nodose 

 process on mandibles. 



Osinia faceta.— ? .—Steel-blue, shining; head and thorax closely and 

 strongly punctured, thinly clothed above with pale pubescence, dense on 

 face, cheeks and sides of thorax; head large, subquadrate; anterior margin 

 of clypeus uneven, the apical middle with two short obtuse teeth; mandibles 

 large, broad, foveate at base, and near tip with a patch of short dense yellowish 

 pubescence; antennae black; mesothorax with a finely impressed longitudinal 

 line anteriorly; tegulae piceous; wings sraoky on apical margin and on upper 

 half of marginal cell; legs black, clothed with pale pubescence; abdomen 

 convex, shining, finely, distinctly and not very closely punctured, sides and 

 lateral apical margin of the segments more or less, fringed with whitish pubes- 

 cence; ventral soopa black. Length .45 inch. 



'J,.— Face, thorax and base of abdomen thickly clothed with long pale 

 pubescence; anterior margin of clypeus crenulated medially; wings paler 

 than in f; apical margin of sixth abdominal segment reflexed, notched in 

 the middle and subsinuate on each side, apical segment bidentate. Length 

 .35— .40 inch. 



Hah.—G?Ln., N. Y., Ga. Eight specimens. This is allied to 

 chaJyhea Smith, in color and sculpture, but is much smaller, with 

 clearer wiugs, etc. 



Osinia abject a.— 9 .—Black, shining ; head and thorax finely and closely 

 punctured, clothed rather thickly with pale pubescence, tinged above with dull 

 ochraceous; clypeus with dense fuscous pubescence: flagellum dull testaceous 

 beneath; mesothorax nearly nude, shining, sparsely punctured, a finely im- 

 pressed longitudinal line on anterior middle and a short elevated line on each 

 side of the disk; basal middle of metathorax smooth and polished; tegulee 

 rufo-piceous; wings dusky about the middle, second submarginal cell nar- 

 rowed nearly one-half towards marginal; tarsi dull testaceous; abdomen short, 

 convex, subglobose, shining, delicately punctured, base and sides of first seg- 

 ment, and lateral apical margin of segments 1—3 clothed with short dense 

 pale pubescence; ventral scopa black. Length .30 inch. 



ifaZ).— Colorado, (Ridings). One specimen. The white fasciae on 

 sides of basal segments of abdomen are very distinct. 



Osinia nigrifrons.- 9 .—Robust, black, tinged with dark blue or 

 green; head and thorax strongly and densely punctured; head subquadrate, 

 clothed with long black pubescence, dense on the face, sometimes slightly 

 mixed with pale hairs on sides of face and on vertex; anterior margin of 

 clypeus truncate or obtusely emarginate; thorax above clothed with long 

 pale pubescence, slightly mixed with black, on the sides and beneath the 

 pubescence is black; tegulae shining black; wings dusky on apical margin; 

 legs with black pubescence, slightly mixed with pale on anterior pair; ab- 

 domen convex, polished, with very fine punctures and clothed with short 

 black pubescence except at base where it is long and pale; ventral scopa 

 black. Length .45 inch. 



iZai.— Colorado, (Morrison). Eight specimens. 



