1S04.] 23 



lei; the head is clothed with long white pubescence, that on the face 

 being very dense; the antennae are as long as the thorax; the anterior 

 margin of the clypeus is smooth, shining and scarcely emarginate ; the 

 thorax beneath, except immediately under the base of the wings, and 

 the legs, especially the femora beneath, are clothed with long white 

 pubescence ; apical margins of the sixth and seventh segments are 

 entire, and the ventral segments have a rather long white pubescence. 

 Hah. — Conn., N. Y., N. J.. Penn., Del., Va., and Kansas. Nume- 

 rous specimens. Coll. Entom. Soc. Philad., and Mr. E. Norton. 



A common species, and varies in color from blue to green and is 

 even sometimes purplish ; the most general color, however, being blu- 

 ish-green. The deeply emarginate clypeus will readily distinguish the 

 9 of this and the next species from all others known to me. 



9. 0. propinqua. n. sp. 



Female. — Head large, subquadrate, as wide as the thorax, dark 

 greenish-blue, densely and finely punctured, clothed with long black 

 pubescence, which is mixed with ochraceous about the insertion of the 

 antennae ; anterior margin of the clypeus strongly produced, and 

 broadly, deeply and squarely emarginate in the middle, so as to leave 

 on each side a rather long, stout, obtuse tooth, the outer face of the 

 emargination black, smooth and shining ; mandibles stout, black, deeply 

 channelled with the apex deeply bifid ; on each side of the extreme 

 base of the mandibles a large smooth, shining tubercle, which has a 

 deep impression posteriorly ; antennae black, rather longer than the 

 head. Thorax blue-green, finely and densely punctured, clothed with 

 long black pubescence, mixed with ochraceous above ; tegul^e black, 

 shininsj, i)unctured. Winjrs subhvaline, costal half of the marginal cell 

 and the apical margins clouded ; nervures blackish. Legs black, 

 clothed with black pubescence. Abdomen subglobose. greenish-blue, 

 shining, densely and minutely punctured ; the two basal segments above 

 clothed with long ochraceous pubescence, the remaining segments with 

 rather short black pubescence ; beneath the ventral scopa is dense and 

 black. Length h\ lines. 



Hah.—^QXi Crook. California. Mr. H. Hike. Coll. Entom. Soc. 

 I'hiladelphia. 



Closely resembles 0. liijitnria Say, but differs principally by the 

 emargination of the clypeus being deeper and broader, and thereby 



