UHLER ON INSECTS. 369 



Inhabits Soatli Caroliua, Georgia, Florida, Gaiana, aad Brazil. 



This species has not yet been brought from Texas or the region west 

 of the great plains unless the next species shall prove to be a form of it. 

 The differences separating them seem ample, but long series from many 

 localities may yield the intermediate links. 



2. C. ohtusus, new sp. 



Form of the preceding; colors generally a little darker. It differs in 

 having a shorter and more bUiut head, more deeply emarginate in front, 

 and the lateral lobes more widely rounded and recurved. Punctures less 

 numerous on the disk and sides of the proaotum, the lateral margins 

 almost sinuated, the lunate impression behind the head narrower ; 

 scutellum very coarsely and sparingly punctured and destitute of punc- 

 tures near the base; anterior tibiae with ten stout teeth, rostrum reach- 

 ing between the posterior coxpe almost to their posterior extremity. The 

 remaining characters are not different from those of the preceding 

 species. 



Length 8-9^ millimeters. Width of base of proaotum 5-6 millimeters. 



From Texas, Arizona, Mexico, and perhaps the same as that from Cape 

 Saint Lucas, Lower California. Many of the specimens which I have 

 inspected show conspicuously the results of wear upon the bristles of 

 the head and teeth of the fore tibiae. In two individuals, these append- 

 ages were entirely broken off" and the bases worn. 



Amnestus Dallas. 



Subquadrangular; moderately deep, more convex beneath than above. 

 Head very small, semicircular, longer than broad, the margin armed with 

 a few very stout, short teeth, of which four are placed on the tip of the 

 tylus; tylus longer than the lateral lobes, ridged and long: eyes large, 

 prominent; ocelli large, placed near the eyes. Antennae of five joints, 

 the basal one short, the second very short, slender, third about as long 

 as the fourth, tapering toward the base, much longer than the second 

 and basal together, fourth and fifth long fusiform, very slenderly artic- 

 ulated. Eostrum long and slender, inserted close to the apex of the 

 head, the basal joint shortest, second and third much longer, about 

 equal, the fourth more slender, shorter than the third; bucculoe composed 

 of a rounded, short plate each side, extending back but a little more 

 than half the length of the throat. Prosternum elevated, bounded each 

 side by a broad, arched plate, the central gutter broad and concave. 

 Pronotum subquadrate, a little wider than long, convex on the disk in 

 front, with the anterior angles broadly rounded, the transverse impressed 

 line placed behind the middle. Ostiolar canal slender, extending almost 

 to the outer margin of the episternum, grooved, with the sides carinately 

 elevated. Scutellum triangular, subequilateral, almost acute, the tip 

 not distinctly contracted. Legs rather slender, not heavily spined, the 

 anterior tibia' compressed, armed with a single row of stout teeth on the 



