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of the dorsal carina of the prothorax is basal in some species, subliasal in others 

 and antebasal in others again. According to the antennae the species can be 

 separated into two groups, one in which the club is loose, the tenth segment 

 being triangular, and a second in which the club is more compact, the tenth 

 segment being transverse. But this division, though convenient for a kej', is 

 not natural, some of the species with a loose club coming otherwise ver\' close 

 to diipar with compact club. Moreover, the club of P. trisds and basalis is 

 intermediate. 



TO. Piezocorynus brevis spec, no v. 



? . Short, brown-black, abdomen rufescent ; a thin mesial line on occiput 

 and at apex of pronotum white ; a broad band from base of pronotnm near middle 

 obliquely outward beyond middle of disc velvety black ; suture ochraceous, except 

 at base, dotted with black. 



Rostrum and head as in gracilicornis ; antennal groove smaller, almost open ; 

 eye much smaller ; underlip entire. Antenna brown, end-segment luteous, club 

 loose, segment 9 a little longer than broad, 10 nearly as long as broad, 11 a 

 little longer than 9. Prothorax obviously longer above than at side, with black 

 mesial tubercle before middle, carina subbasal, shallowly bisinuate, laterally flexed 

 forward in an even arch, longitudinal portion very short. Elytra short, finely 

 striate-puuctate, interstices not at all convex, subbasal convexity very prominent, 

 tuberculiform, black, a smaller black elevation in middle and two black pustules 

 on declivous apex, also in third interspace. Underside with a sparse white 

 pubescence. Tarsal segments 3 and 4 rnfescent. Anal sternite as short as fourth. 



Length, 5| mm. 



Hab. Colombia. 



1 ?. 



71. Piezocorynus plagifer spec nov. 



i ? . Similar to P. dispar (1833) Gylh. The clayish patch of elytra extending 

 to apical declivity in interspaces 1, 2 and 3, and interspace 6 tesselated. Antenna 

 deeper brown-black, segments 1 to 8 rufous at tip, thicker than in dispar, 8 

 compressed in J, .triangular, half as long as apically broad, also rather broad 

 in ? , club shorter and broader than in dispar. 



Hab. Jatahy, Goyaz, ti/j/e ; Turrialba, Costa Rica. 



1 c?, 3 ??. 



72. Piezocorynus compar spec. nov. 



<?. Pronotum with a rather large mesial apical greyish clay spot. Clayish 

 patch of elytra occupying interspaces 1 to 4, the patch truncate before apical 

 declivity, obliquely truncate in front on each elytrum, not reaching scutellnm, 

 anterior edge running across subbasal callosity, four spots in fifth interspace 

 (the first the longest) joined to the patch, interspaces 1 and 3 slightly greyish 

 within patch, the first with some minute black dots, the third with one large 

 black dash in middle and a black dot farther back. Pale antemedian and 

 apical rings of tibiae conspicuous. Segments 10 and 11 of antenna luteons, 8 

 more than twice as long as broad, elongate-triangular, angles not produced, 

 9 a little longer than broad, 11 almost circular. Prothorax more conical than 



