34 . [April 



margin of the segments smooth and shining; clothed above, especially 

 towards the tip, with short pale pubescence ; apical margin of the sixth 

 segment somewhat reflesed and rather deeply and obtusely notched in 

 the middle, and that of the apical segment bidentate. Length 4^ lines. 



Hah. — Illinois. Two specimenj. Coll. Mr. E. Norton. 



Larger than 0. canadensis, from which it can be easily distinguished 

 by the smoother appeai'ance and blue color of the abdomen. 



26. 0. fulgida. n. sj?. 



Female. — Head subquadrate, about as wide as the thorax, brilliant 

 green with blue reflections, finely and densely punctured, thickly 

 clothed with rather long black pubescence ; anterior margin of the 

 clypeus black, truncate ; mandibles stout, black, clothed with short 

 black pubescence, armed with four teeth, the apical one rather long 

 and subacute, the others short and blunt ; antennae black, scape green, 

 finely punctured, tip of the flagellum beneath testaceous. Thorax finely 

 and densely punctured, brilliant green, with bluish reflections, clothed 

 with rather long black pubescence ; disk longitudinally impressed in 

 front, and on each side ; midway between the disk and the tegulje 

 there is a very short, longitudinal impressed line which is black ; 

 metathorax more finely punctured, with a broad, deep depression on its 

 disk ; tegulae black and shining. Wings subhyaline, apical margins 

 clouded ; nervures black. Legs bluish-green, clothed with short black- 

 ish pubescence, tarsi with fuscous pubescence Abdomen subglobose. 

 rather wider posteriorly, densely and minutely punctured, brilliant 

 green, with bright blue reflections, polished, sparsely clothed with short 

 black pubescence ; basal segment in front deeply and longitudinally 

 impressed ; beneath, the ventral scopa is dense and blackish-fuscous. 

 Length 42 lines. 



Ildb. — Rocky Mountains, Col. Ter. One specimen. Coll. Entom. 

 Soc. Philadelphia. 



A very handsome species, having the colors remarkably bright and 

 vivid. It resembles the next species but is more robust and somewhat 

 differently shaped. 



27. 0. viridis, u. sp. 



Female. — Narrow, elongate. Head subquadrate, as wide as the thd- 

 rax, finely and densely punctured, brilliant blue-green, clothed with 

 rather long black hairs, which are more dense beneath the antennae ; 



