4 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.71 



direction opposite to that of the first and second. It is of equal 

 width throughout its length and connects the sutural and marginal 

 beads. Vestiture fine, not as dense as on the pronotum, black in 

 front of and gray behind the subapical band. Underparts densely 

 clothed with gray hairs. Length: 8.5 mm. Locality: Rurrenabaque. 



Type.— Cat. No. 29356, U.S.N.M. 



Compared with a paratype of E. inimicus Wolcott the present 

 species is much larger, its thorax is broader than long instead of the 

 reverse, the palpi are dark instead of light, the second oblique band 

 is not of equal width throughout and the subapical band is of equal 

 width throughout its length. 



In the original description of E. inimicus, the thorax is said to be 

 broader than long. Measurements of a paratype give the ratio of 

 length to breadth as 38-35. 



3. ENOCLERUS FLAVIBASIS, new species 



Somewhat similar to E. laticinctus (White). Black, elytra with 

 basal half except the scutellar region testaceous, scutellar region and 

 apical half violaceous black. Head finely and rather densely punc- 

 tured, punctures near frontal margin slightly more coarse, front with 

 two shallow impressions. Vestiture sparse, mostly gray. Antennae 

 much shorter than the pronotum, black; first segment pale beneath, 

 last segment very slightly longer than the two preceding together. 

 Pronotum slightly broader than long (40-43), finely and rather 

 densely punctured, the punctures slightly more coarse near the ante- 

 rior margin; anterior transverse impression shallow, arcuate across 

 the disk with the convexity posterior, laterally the impression is 

 filled with whitish pubescence. There are a few white hairs poste- 

 riorly, otherwise the vestiture is black. Scutellum black. Elytra 

 with extremely fine punctures, these rather more densely set on the 

 posterior than on the anterior half. Anterior half, except for the 

 immediate scutellar region, whitish testaceous. Scutellar region and 

 posterior half violaceous black. Vestiture fine, short and dense, each 

 hair concolorous with the surface from whence it arises. Underparts 

 of thorax and abdomen black with bluish reflections, legs black. 

 Abdomen sparsel.y, thorax more densely and legs very densely set 

 with whitish hairs. Length: 7.5 mm. Locahty: Rurrenabaque. 



Type and paratype. — Cat. No. 29357, U.S.N.M. 



Subfamily Hydnocerinae 

 Genus HYDNOCERA Newman, 1838 



4. H\DNOCERA KUACHIANA, new species 



Form of //. laematica Gorham. Above testaceous with darker and 

 lighter markings, underparts piceous black', legs pale. Head uniform 

 dark testaceous, punctation fine and sparse on vertex, rather more 



