630 MR. MARTIN JACOBY ON NEW [Nov. 6, 



anterior angles produced and thickened but not toothed, the sur- 

 face rather convex, iiupunctate, fiavous, posterior margin slightly 

 sinuate at the sides ; scutellum black ; elytra with a depression 

 below the base, very bright metallic gi'een, impunctate; under- 

 side and femora flavous, the tibia) and tarsi black. 



Hab. Amazons, also Bolivia. 



Allied to A. .vanthocephala, Har., but the clypeus and the entire 

 underside flavous, the elytra more brilliant metallic. 



AsrnvERA MELANOCErHALA, n. sp. 



Flavous, the head, antenna), and tibiae and tarsi black ; thorax 

 impunctate ; elytra bluish black, impunctate. 



Length 2^ lines. 



Head black, with a single puncture near the eyes, frontal tuber- 

 cles transverse, rather feebly raised ; clypeus strongly developed, 

 black, the sides flavous ; palpi strongly thickened ; antennas rather 

 long, black, all the joints, the second one excepted, of nearly equal 

 length ; thorax more than twice as broad as long, the sides nearly 

 straight, narrowly margined, the anterior angles thickened but not 

 toothed, the surface impunctate, pale flavous ; scutellum black ; 

 elytra with a small depression below the base, bluish black, im- 

 punctate; underside and femora flavous, tibia) and tarsi black, the 

 first joint of the posterior tarsi as long as the following two joints 

 together. 



Hab. Amazons. 



Principally distinguished by the colour of the head and that of 

 the clypeus. 



Aspn.ERA clarki, n. sp. 



Flavous, thorax rather narrow, scarcely margined, nearly im- 

 punctate, scutellum piceous ; elytra impunctate, a transverse baud 

 at the base and another below the middle violaceous blue. 



Length 2| lines. 



Head pale fulvous, with a few punctures near the eyes, the 

 latter large, the dividing space scarcely broader than their diameter, 

 frontal tubercles trigonate ; antenna) fulvous, extending to the 

 middle of the elytra, the basal two joints shining, the others 

 pubescent, third and following joints equal, elongate ; thorax 

 scarcely more than twice as broad as long, the sides but slightly 

 rounded, narrowly flattened, anterior angles produced into a small 

 tooth, the surface with some very minute punctures when seen 

 under a very strong lens ; scutellum piceous ; elytra with a broadly 

 flattened margin, sculptured like the thorax, flavous, with a trans- 

 verse band slightly widened at the suture and not extending to 

 the sides, and a similar band below the middle, violaceous blue ; 

 underside and legs flavous, the apex of the femora generally darker 

 or stained with piceous, the first joint of the posterior tarsi as 

 long as the following joints together, claw-joint moderately 

 swollen. 



Hab, Amazons, 



