1905. | OF PHYTOPHAGOUS COLEOPTERA. 419 
surrounded and separated by very narrow spaces or bands of the 
ground-colour ; under side and legs pale piceous; claw-joint 
moderately swollen. 
Hab. Bolivia; also Brazil. 
Of this species I have seen a great many specimens of most 
variable coloration, some of which have the elytral bands very 
dark in regard to the basal and subapical ones, and the inter- 
mediate bands pale or absent altogether and entire or divided into 
two spots as described here. Jt is possible that the species is 
identical with 4. albida Schauf. 
Genus OEDIONYCHIS. 
Elytra entirely pale-coloured or nearly so. 
OEDIONYCHIS ROTUNDICOLLIS, Sp. n. 
Broadly ovate, subdepressed, pale testaceous ; antenne and the 
posterior femora obscure piceous ; sides of thorax strongly rounded, 
broadly flattened, impunctate ; elytra extremely minutely 
punctured. 
Length 8 millim. 
Head impunctate, frontal elevations transverse ; antenne pale 
piceous, the third joint slightly shorter than the fourth and 
following joints; thorax about twice and a half broader than 
long, the sides strongly rounded and broadly flattened, the 
anterior angles strongly pointed but scarcely dentiform, the 
surface impunctate; elytra broadly ovate, the margins narrowly 
reflexed, the base with a very shallow depression, the surface 
scarcely perceptibly punctured ; posterior femora pale piceous. 
Hab. Espirito Santo, Brazil. 
The sides of the thorax in this species are more rounded than 
in any of the unicolorous members of the genus with which I am 
acquainted ; the elytra are likewise of more broadly rounded shape 
than usual. 
OEDIONYCHIS PARAGUAYENSIS, Sp. . 
Short and convex, testaceous; apical joints of the antennz 
black ; thorax densely and strongly punctured, the sides not 
deeply flattened ; elytra punctured like the thorax. 
Length 7 millim. 
Head somewhat closely punctured, frontal elevations oblique, 
carina short and broad ; antenne scarcely extending to the middle 
of the elytra, the lower three joints testaceous, the others black, 
third and following joints nearly equal, rather elongate; thorax 
twice as broad as long, the lateral margins feebly but evenly 
rounded, the anterior angles produced outwards into a small 
tooth, the surface rugosely and rather strongly punctured, the 
sides gradually and rather shallowly flattened ; scutellum black ; 
elytra rather strongly convex below the middle, sculptured like 
the thorax ; legs short and robust. , 
