AMERICAN COLEOPTERA. 133 



Distinct from umhrosua by its less elongate form and the uniform 

 color of elytra. The obtuse teeth of the margin are more distinct and 

 the punctures of the surface of the thorax are less dense and never 

 confluent. 



This species was collected by Mr. Wm. M. Gabb in South-eastern 



Oregon. / 



I 



0. fasciatus Bland, Proe. Ent. Soc. 1864, 25.3. 



The collection of the Society contains two specimens of this pretty 

 species. The thorax is aeneous, feebly punctured. Elytra elongate 

 oval, and ornamented with yellow in the following manner: a large 

 irregular spot at base enclosing a small black spot on basal margin of 

 elytra, near the middle of each elytron ; atfirregular band behind the 

 middle, broadest at suture and not reaching the margin; a ri)and sub- 

 apical spot close to the suture, and the apex also paler. Legs and an- 

 tennas yellow. Length .15 inch. 



0. mexicanus, elongate, head and thorax seneous, coarsely but not densely 

 jjunctured. Thorax subquadrate, hind angles distinct. Elytra elongate oval, 

 coarsely but not densely punctured, brownish ornamented with paler bands 

 and sparsely clothed with suberect whitish hairs. Body beneath paler, coarsely 

 and sparsely punctured. Legs and antennse yellowish. Length .19 inch. 



The elytral ornamentation is similar to the preceding species, and is 

 as follows : an oval basal spot enclosing a small black spot near its apex, 

 and at the basal margin of the elytra, and an irregular transverse bund 

 behind the middle, very broad at the suture, narrowing rapidly and 

 not extending to the margin. 



From Mexico. Collection of Dr. LeConte. 



Differs from all our species in its elongate form, and being more 

 attenuate behind. The elytra are also much smoother and scarcely 

 punctured near the sides and apex. 



GYASCUTUS Lee. 

 G. cnneatus, elongate, cuaeate, seneous-greeu, shining, epistoine truncate, 

 head intricato-rugose, thorax slightly broader than long, narrowed in front 

 sides nearly straight, truncate in front, trisinuate at base, hind angles acute, 

 not divergent, coarsely, and at the sides confluently punctured. Elytra narrow, 

 convex, gradually narrowing from base, apex bideutate, rather coarsely and ir- 

 regularly striato-punctate. Beneath finely and densely punctured. Hind tar- 

 sus as long as tibia, compressed, first joint equalling the two following. Length 

 .75 inch. 



One specimen from Owen's Valley, California. Collected by Dr. H. 

 M. Cronkhite, with many other specimens of G. ohliteralus. Differs 

 from our other species in its cuneate form, and by its tarsal characters. 

 Its color beneath is paler, the presternum polished and violet colored. 



