438 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



convex, their sides not strongly crenate. Metasternum shining, 

 smooth, with scattered very fine punctures, depressed at middle, 

 midline strong, deeper over posterior two-thirds, anterior postcoxal 

 line fine, strong, extending outward to similar lateral line along ex- 

 treme edge, posterior arcuate antecoxal line strong, extending to 

 lateral line in extreme posterior angle. Abdominal segments smooth, 

 moderately shining, very finely alutaceous, very finely crenate along 

 anterior margin, finely margined along posterior edge, terminal seg- 

 ment more widely crenate in front. Pygidium scabrous each side 

 basally, fringed apically with eight rather short fine hairs. Anterior 

 femur finely, deeply margined anteriorly, posterior face smooth and 

 shining. Middle and posterior femurs smooth and shining, with 

 fine, strong posterior marginal line visible from the rear, a single 

 marginal setigerous puncture near apical third. Posterior femur 

 one-seventh wider than middle femur. Posterior tibia about three 

 times as long as \vide at apex, spurs narrow, long spur shorter than 

 first two tarsal joints together. First tarsal joint elongate-triangular, 

 as long as following two joints together. Length 2.5 mm., width 

 1.1 mm. 



Type: In British Museum (Natural History). 



Type locality: Manaos, Amazonas, Brazil. 



Specimens examined: The unique holotype only. Specimen 

 collected August 1874 by J. W. H. Trail. 



Remarks: This species is closely related to P. santaremi and P. 

 bolivianus. It difi'ers from the first-named by the finer striae and less 

 crenate intervals of the elytra, more distinctly margined base of the 

 elytra, and fewer coarse punctures of the pronotum. From the 

 second it differs in the strong deep lines of the metasternum. 



Psammodius santaremi, new species 



Holotype oblong oval, moderately shining, ferrugineus. Antennae 

 rufotestaceous. Head convex, closely moderately verrucose; occiput 

 with three or four shallow, coarse punctures each side near frontal 

 suture, otherwise very finely punctate. Clypeus moderate'y deeply, 

 triangularly emarginate, limiting angles each side rounded, margin 

 finely reflexed, sides feebly arcuate; genae rounded, fimbriate. Prono- 

 tum slightly narrower in front, width 1 mm., length 0.65 mm., an- 

 terior angles rounded, posterior angles obtusely rounded, sides and 

 base entire, not crenate, not fimbriate, distinctly margined; surface 

 with close, deep, coarse punctures arranged in three transverse grooves, 

 the first widely expanded anteriorly over the disc, the second and third 

 interrupted by the similarly punctate median longitudinal fine, the 

 second two or three punctures wide, the third a single irregular row 

 of punctures; surface otherwise smooth. Elytra as wide as pronotum 



