24 [ A PR [ L 



making the tooth ou each side much more prominent. It may be 

 nothing more than a variety of that species. 



10. 0. californica, n. sp. 



Female. — Head subtransverse. as wide as the thorax, densely and 

 rather strongly punctured, black tinged with dark green, clothed with 

 rather long black pubescence ; clypeus more strongly and less densely 

 punctured, prominent, convex, shining, with a smooth line down its 

 middle, anterior margin rather deeply emarginate; mandibles robust, 

 apical tooth long and acute, deeply channelled along the outer margin ; 

 antenna) black, scape shining, slightly tinged with green, flagellum 

 beneath subsericeous. Thorax finely and densely punctured, black 

 tinged with dark green, thickly clothed with long l>lack pubescence ; 

 on each side above the tegukx) a very small smooth shining spot; meta- 

 thorax tinged with deep blue; tegula? black, shining, finely punctured. 

 Wings hyaline, the marginal and first submarginal cells and the apical 

 margins faintly stained with fuscous; nervures blackish. Legs black, 

 punctured, clothed with short black pubescence, the tarsi beneath with 

 short fuscous pubescence. Abdomen subglobose, minutely punctured, 

 black, with a greenish-blue reflection, shining, rather thickly clothed 

 with short black pubescence ; beneath, the ventral scopa is dense and 

 black. Length 5 lines. 



Hah.— ¥ovi Crook, California. Mr. H. Ulke. CoU. Ent. Soe. Philad. 



Shaped like 0. Inpiaria Say, but is at once distinguished from that . 

 species by the black pubescence and the shape of the clypeus. 



11. 0. montana. u. sp. 



Male. — Head subquadrate, as wide as the thorax, densely and rather 

 strongly punctured, deep blue, tinged with green anteriorly ; face 

 densely clothed with long whitish pubescence ; the vertex has some 

 long ochraceous, and the cheeks a rather long dense black pubescence ; 

 clypeus more finely punctured, anterior margin truncate, smooth and 

 shining; antennae as long as the head and thorax, black, flagellum 

 piceous beneath. Thorax finely and very densely punctured; dark 

 blue, opaque, clothed above with long ochraceous, and below with black 

 pubescence; disk in front with a smooth shining longitudinal line and 

 on each side of this line there is a very short impressed line proceeding 

 from the anterior margin and extending obliquely inwards ; tegula? 

 black and shining. Wings hyaline, nervures fuscous. Legs black, 



