Brazilian Baring 53 



hind femora in this sex are dentate externally beneath beyond the 

 middle; in many sections, however, such as the small black polished 

 forms of section 26, as well as the deeply exarate caviventris section, 

 this feature becomes completely obsolete. In a manner strangely 

 different from the Barini and most Centrinini, basal abdominal 

 characters as a source of sex discrimination are unknown, the 

 abdomen, though greatly modified at base, is altogether similar in 

 the sexes, so far as I can determine. 



Eulophodes n. gen. 



The only species of this genus known to me at present is the 

 following: 



Eulophodes tumifer n. sp. — Broadly and strongly rhombic in form, very smooth, 

 polished and obscure subseneous in color, the legs deep black; surface completely 

 glabrous; beak in the type not four-fifths as long as the prothorax, thick, sub- 

 compressed, distinctly and closely punctate throughout, more finely above, feebly 

 strigose at base toward the eyes; antennae a little behind the middle; head with 

 rather small but deep discrete punctuation; prothorax about as long as wide, 

 the converging sides straight, broadly rounding anteriorly to the apical sinuses, 

 the truncate apex two-fifths as wide as the base; surface polished and impunctate; 

 basal lobe prominent and strongly rounded; median line at base abruptly ele- 

 vated and compressed, the elevation by lateral view only three-fourths as high as 

 the thickness of the beak, with its summit irregular, rapidly sloping posteriorly, 

 not in the least spiniform; elytra slightly longer than wide and triangular, with 

 arcuate sides and obtusely rounded apex, nearly a third wider than the prothorax 

 and three-fourths longer, the rounded humeri very prominent; strise very fine, 

 feeble and subobsolete, but with the small remote punctures distinct; intervals 

 polished and wholly impunctate; basal abdominal segment in the type sub- 

 prominently convex and finely, sparsely punctate, moderately impressed medially 

 at base. Length 6.8 mm.; width 4.8 mm. Brazil (Rio de Janeiro). One 

 specimen, of undetermined sex. 



This species differs from monoceros Boh., in the more punctate 

 beak, longer prothorax, with much smaller, feebler and wholly non- 

 spiniform basal elevation, obscure aeneous and not dark cyaneous 

 polished lustre of the body and smoother strial interspaces. The 

 tarsal claws are rather small, feebly arcuate, parallel and are closely 

 contiguous, and perhaps to some extent, connate, at base. 



Idiopsida n. gen. 



The few known species of this genus so closely resemble Diory- 

 merus to external view, that they are probably always mingled 

 with the latter in collections, but, although habitally so similar, 

 the radically different mandibles, antennal club, abdominal base, 

 femora and tibiae, will serve to identify them whenever any one of 

 these characters happens to be observed. There are in my collec- 

 tion five species as follows: 



