1905.] OF PHYTOPHAGOUS COLEOPTERA. 459 



Elytra otherwise marked. 



Oedionychis bicolorata, sp. n. 



Testaceous ; the head, antennae, breast, and the legs black ; 

 thorax impunctate, the anterior angles produced ; elytra extremely 

 minutely punctured, the anterior two-thirds metallic greenish- 

 seneous, the rest testaceous. 



Length 7 millim. 



Head with some fine punctures at the vertex, the frontal 

 elevations pyriform ; clypeus flavous, strongly transvei'sely raised ; 

 antennae black, the basal joint elongate, strongly widened ante- 

 riorly, third joint shorter than the fourth ; thorax rather strongly 

 narrowed anteriorly, the sides neai*ly straight, the anterior angles 

 much produced and pointed, the sides broadly flattened, the surface 

 iinpunctate, testaceous ; scutellum black ; elytra very feebly de- 

 pressed below the base, very minutely and closely punctured, the 

 anterior portion to below the middle metallic greenish, this colour 

 not quite extending to the lateral margins and divided by a sti-aight 

 line from the apical testaceous portion ; the breast and legs black ; 

 the abdomen testaceovis. 



Hah. Baiios, Ecuador. 



This is a peculiarly marked species, of which I know only a 

 single specimen. The thorax has the sides less rounded than 

 is usually the case and the angles much produced ; these difier- 

 ences distinguish the species from 0. holivianus Jac, previously 

 described, which must find its place in Asphcera, as the metatarsus 

 of the hind legs is decidedly elongate ; otherwise the coloration of 

 the elytra nearly resembles that of the present species, except that 

 the metallic colour of the latter occupies only the anterior half of 

 the elytra. 



Oedionychts nigrobasalis, sp. n. 



Testaceous, the intermediate joints of the antennte black ; thorax 

 impunctate ; elytra very finely punctured, a ti'ansverse band at the 

 base and another one near the apex fulvous, the extreme basal 

 margin black. 



Length 7-8 millim. 



Head impunctate, testaceous or pale fulvous ; eyes veiy large, 

 rather closely approached ; antennae with the four basal and the 

 two apical joints testaceous, the others black, third and fourth 

 joints equal ; thorax with very broadly flattened sides, the lateral 

 margins rounded, the anterior angles produced outwards into 

 a small tooth, the surface entirely impunctate, testaceous ; scu- 

 tellum blackish at the base ; elytra testaceous, with a transverse 

 fulvou.s band at the base ; this band is concave at its posterior 

 edge and extends generally downwards in a narrow stripe along 

 the suture, where it is connected with another broad transverse 

 band near the apex, neither of them extends to the lateral margins, 

 and the posterior band is sometimes reduced to a round spot ; 



