1905.] OF PHYTOPHAGOUS COLEOPTERA. 443 



and fourth joints equal ; thorax scai-cely more than twice as 

 broad as long, the sides with well-marked flattened margins, 

 feebly rounded, anterior angles not prodviced, the surface im- 

 punctate, testaceous ; scutellum piceous ; elytra visibly punctured 

 only when seen under a very strong lens, with narrow flattened 

 margins, testaceoiis, with two transvei'se nearly black bands, the 

 first at the base, of somewhat triangular shape, and connected at 

 the suture with another broader band below the middle, not 

 extending to the apex, neither of the bands extends quite to the 

 lateral margins ; breast and abdomen black, legs testaceous. 



Hah. Bolivia. 



A small and very variable species, in which the nearly black 

 vertex of the head seems to be the only constant character so 

 far as coloiation is concerned. The description is based on a 

 specimen in which the elytral bands are mostly developed ; the 

 elytra in this form may be described as black, with the latei-al 

 and apical margins, as well as a slightly obliqixe transverse band 

 at the middle, testaceous, this band not extending to the suture ; 

 in this specimen the posterior tibise and tarsi are black. In the 

 var. a the dark bands are smaller and disconnected, and the 

 posterior one is in shape of an oblong patch on each elytron ; in 

 var. h there is only a black spot near the scutellum and an elongate 

 larger one placed near the suture below the middle ; while in var. c 

 the elytra are entirely unspotted. In all these forms, however, 

 the base of the head and the underside remain black. 



Oedionychis .exea, sp. n. (Clark, MS.). 



Fulvous ; thorax flavous, the sides broadly sulcate ; elytra veiy 

 convex and strongly widened at the middle, minutely punctui'ed, 

 a transverse band at the base and another one, narrowed at the 

 suture and not extending to either margin, violaceous blue. 



Length 8 millim. 



Head fulvous, impunctate, frontal elevations narrow and trans- 

 verse, carina acute, eyes not closely approached ; antennfe with 

 the third joint much shorter than the fourth, fulvous (the other 

 joints wanting); thorax more than twice as broad as long, the 

 sides strongly rounded and broadly sulcate, the anterior angles 

 slightly mucronate and strongly thickened, posterior margin 

 sinuate at each side, the disc impunctate, flavous ; scutellum 

 fusco-violaceous ; elytra strongly widened and convex, flavous, 

 with a broad transverse band at the base not extending to the 

 lateral margins, of violaceous-blue colour, but more or less dark 

 fv;lvous when viewed sideways, another band, rather sviddenly 

 widened at its outer end, is placed below the middle but does not 

 extend to either margin ; the flavous portion separating these bands 

 is of about the same width as the bands themselves ; breast and 

 the femora dark fulvous, tibife and tarsi flavous ; metatarsus very 

 short, claw-joint strongly swollen. 



Kah. Ega, Amazon {Bates). 



The description of this species is based on a specimen named 



