70 ' [June 



Hab.—B.O(ikj Mountains, Col. Ter. (Coll. Ent. Soc. Philad.) 



% . Body black, shining ; head closely punctured, with a longitudi- 

 nal impressed line on the vertex ; mouth piceous, with yellowish pu- 

 bescence ; antennae about as long as the body, black. Thorax black, 

 polished, feebly punctured, broader than long, narrowed in front and 

 suddenly constricted to a band at both anterior and posterior margins ; 

 dorsal groove finely impressed, and on each side of it a shallow depres- 

 sion, outside of which, near the lateral margin, there is a much deeper 

 depression ; scutellum black, finely canaliculate, with a deep puncture 

 near the tip. Elytra about twice as broad as the thorax, narrowed 

 posteriorly ; deep metallic blue, deeply and closely punctured, especially 

 at base ; humerus very prominent, there being a profound depression 

 between it and the scutellum ; body beneath black, abdomen rufous. 

 Legs black, the femora, except base and apex, fulvous. Length 6 lines. 



Distinguished from G. cyanipennis Say, and G. ahdominalis Bland, 

 by the much coarser punctation and by the color of the antennae and 

 legs; from cyanipoinis it is at once distinguished by the short trans- 

 verse thorax, the shape of which approaches that of ahdomtnaUa, but 

 is still more transverse. It is, however, abundantly distinct from either 

 species. 



Presented to the Society by Mr. E. T. Cresson, to whom it is dedi- 

 cated. 



Mel(E Aper, n. sp. 



Short, black ; head and thorax coarsely and deeply punctured ; 

 elytra shining, rugosely punctured. 



Hab. — Nebraska. (Coll. Knt. Soc. Philadelphia.) 



Male. — Deep black. Head broader than the thorax, deeply, coarsely 

 and somewhat confluently punctured ; vertex with a longitudinal im- 

 pressed line ; antennte as long as the head and thorax, the 4th to 10th 

 joints moniliform, black, the 8th to apical joints pubescent. Thorax 

 punctured like the head, quadrate, sides slightly sinuate behind the 

 middle ; disk with a deep longitudinal impression near the posterior 

 margin which is depressed and sinuate. Elytra shining, rugosely punc- 

 tured, the abdominal segments densely punctured. Legs black, faintly 

 tinged with blue, sparsely punctured, shining; tarsal claws cleft. 

 Leno'th 4i lines. 



