AET. 31 BUPRESTID BEETLES FROM BOLIVIA FISHER 29 



cuately emarginate on each side, with the median lobe moderately 

 produced, and broadly rounded in front of scutellum; surface with 

 a broad, rather deep depression, extending from near the lateral 

 margin at middle, obliquely backward and covering the entire 

 postero-median part, the depression more deeply depressed poster- 

 iorly, with the sides abruptly marked, densely, coarsely granulose, 

 and strongly, irregularly, transversely rugose on the disk. Scutel- 

 lum triangular, acute at apex, with the surface coarsely and densely 

 granulose. Elytra with the sides moderately expanded behind the 

 humeral angles, feebly, broadl}^ arcuately constricted near basal 

 third, then broadly arcuately expanded at apical third, and finally 

 arcuatel}^ attenuate to the tips, which are separately broadly 

 rounded, with the lateral margins entire; humeri feebly developed; 

 each elytron with a broad, very shallow basal depression, with a 

 short, straight, strongly elevated carina extending from the hu- 

 merus to middle of elytron, and with the suture feebly elevated poste- 

 riorly; surface coarsely, densely granulose, obsoletely rugose, with 

 few obsolete punctures, which have a tendency of forming rows 

 on the disk, and sparsely clothed with very short, inconspicuous 

 hairs. Abdomen beneath finely, densely granulose, with a few ob- 

 solete punctures intermixed, and sparsely clothed with very short 

 inconspicuous hairs. 



Length, 4.T5 mm. ; width, 1.5 mm. 



Type locality. — Huachi (Beni River), Bolivia. 



Type.— C2it. No. 26979, U.S.N.M. 



Described from a unique male, collected at the type locality dur- 

 ing September, 1921. 



PACHYSCHELUS CAVINAS, new species 



Female. — Broadly cuneiform, distinctly longer than wide, broadly 

 rounded in front, strongly attenuate posteriorly, distinctly nar- 

 rower behind than in front, and the surface glabrous and moderately 

 shining; head, pronotum, and scutellum green, with a feeble aeneous 

 tinge; elytra dark greenish-blue, with a distinct violaceous reflec- 

 tion, especially toward the sides; beneath piceous, and more shining 

 than above. 



Head feebly and evenly convex, deeply embedded in the prothorax, 

 without any depression, but with a very narrow, obsolete groove, 

 which is onl}'^ indicated on the front; surface glabrous, nearly 

 smooth on the occiput, but becoming finely and densely granulose 

 toward the epistoma, and with a few coarse, irregularly placed 

 punctures intermixed. Pronotum nearlj'' flat, strongly declivous at 

 anterior angles, four times as wide as long at middle, very much 

 narrower in front than behind, and widest at base; sides strongly 

 obli<^uely attenuate (feebly arcuate) from base to anterior angles, 



