1904.] AMERICAN PHYTOPHAGOUS COLEOPTERA. 411 



only visible under a strong lens, pale testaceous oi" fiavous, the 

 shoulders with an elongate black spot ; femora robust, fiavous 

 like the under side, tibife partly or entirely as well as the tarsi 

 black. 



Hah. Tucurrique, Costa Rica. 



Of the genus Pseudogona, established by rae in the Biologia 

 Centr.-Amer., four species are now known ; they are neat-looking 

 insects, and distinguished by the subquadrate thorax without sulcus 

 in connection with the closed cavities, &c. The present species 

 seems variable in regard to coloration ; the entirely fiavous under- 

 side and the markings of the elytra (when present) distinguish the 

 species. 



OXYGONA AMAZONICA, Sp. n. 



Fiavous ; the antennse piceous, thorax impunctate ; elytra ex- 

 tremely minutely punctured, a transverse band at the base and 

 an elongate spot near the apex obscure piceous. 



Length 6 millim. 



Head impunctate, with a central fovea, clypeus broad between 

 the antennae, deflexed anteriorly ; antennfe extending to the middle 

 of the elytra, piceous, the third and following joints nearly equal ; 

 thorax more than twice as broad as long, of usual shape, the sides 

 slightly rounded, with a narrow margin, the anterior angles oblique, 

 the disc impunctate, fiavous ; elytra with a slight depression below 

 the base, impunctate, with the excejation of a few fine punctures 

 at the base, the latter with a narrow transverse piceous band, 

 the apex with a similar elongate spot not extending to the 

 m.argins ; underside and legs fiavous, the apex of the posterior 

 femora and the tarsi sometimes stained with piceous. 



Hah. Amazons. 



I possess two exactly similar specimens, which differ from their 

 ■congeners in the design of the elytra. 



OxYGONA CAPITATA, Sp. n. 



Testaceous, the base of the head, the thorax, and the scutellum 

 obscure piceous, thorax impunctate ; elytra finely and closely punc- 

 tured, antennfe pale piceous. 



Length 5| millim. 



Head impmictate, the vertex pale piceous, the lower portion of 

 the face fiavous ; frontal elevations strongly raised, pear-shaped ; 

 clypeus fiattened anteriorly ; antennae extending to two-thirds the 

 length of the elytra, pale piceous, the third and fourth joints 

 elongate, equal ; thorax twice as broad as long, the sides very 

 slightly constricted at the base, the anterior angles slightly pro- 

 duced outwards, thickened, the surface rather convex, pale piceous, 

 impunctate ; scutellum piceous ; elytra very finely and rather 

 obsoletely punctured, much paler than the thorax ; under side and 

 legs coloured like the elytra. 



Hah. Peru. 



There are two exactly similarly coloured specimens before me, 



