30 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. 66 



which are acutely angiilated; anterior margin broadly and deeply 

 arcuately emarginate; base transversely sinuate, acutely emarginate 

 at elytral lobes, and broadly truncate in front of scutellum ; posterior 

 angles acute, projecting slightly beyond the humeral angles of 

 elytra and fitting closely to them; surface glabrous, sparsely and 

 very irregularly punctate, the punctures finer on the median part, 

 but becoming coarser toward the sides; intervals nearly smooth on 

 the disk, and finely, densely granulose along the lateral margins. 

 Scutellum wider than long, glabrous, smooth, with the anterior angles 

 rectangular. Elytra as wide as pronotum at base, and v\ddest at 

 basal third; humeral angles broadly rounded; sides arcuately ex- 

 panded to basal third, where they are broadly rounded, then obliquely 

 attenuate to near the tips, which are conjointly rather narrowly 

 rounded, the lateral margins strongly serrate, and when viewed 

 from the side are nearly straight, except for an abrupt sinuation 

 for the posterior femora ; each elytron with a broad shallow depres- 

 sion at base, and a very broad, deeper one behind the humerus, 

 broadly flattened at the lateral margin and extending forward to 

 the humeral angle; surface with more or less regular rows of fine, 

 irregularly placed punctures, which are distinct on the basal region, 

 but becoming obsolete posteriorly, and with the intervals smooth. 

 Abdomen beneath moderately convex, finely, sparsely, and obso- 

 letely punctate, and clothed with a few very short, inconspicuous 

 hairs; intervals finely and obsoletely reticulate; last segment 

 strongly, narrowly produced, and very deeply triangularly emargi- 

 nate at apex, with four sharp teeth arranged in pairs obliquely on 

 each side of the emargination, the anterior pair shorter than the 

 apical pair, the ventral surface with a moderately deep, longitudinal 

 depression, extending from the apex to near the middle. Elytral 

 epipleura narrow. Metasternum sparseh^ coarsely punctate, and 

 feebly, broadly, arcuately emarginate in front. Prosternum feebly 

 arcuately emarginate in front, the surface nearly glabrous, smooth, 

 and with only a few fine obsolete punctures; prosternal process four 

 times as wide as the coxal cavities, sides feebly rounded, and broadly 

 rounded or subtruncate at apex. 



Length, 3.1 mm.; width, 2.25 mm. 



Type locality. — Canamina, Bolivia. 



Type and par atype.— Cat. No. 2G980, U.S.N.M. 



Described from two females collected at the type locality during 

 January, 1922. 



PACHYSCHELUS JUCUNDUS (Kirsch) 

 Brachys jumindiis Kirsch, Berl. Ent. Zeit., vol. 17, 1873, p. 361. 



One specimen collected at Rosario (Lake Rogagua), during 

 the latter part of October, 1921, by M. R. Lopez. 



