368 ^ COLEOPTERA 



its episterna narrow and parallel ; epimera distinct. Mesothoracic 

 epimera rather broad. 



Gilibe. 



Latr. ; De Breme, Mon. d. Cossyph., part \., p. 37 ; Lacord. Hist, des 

 Ins. Coleop., Tom. v.,/. 349. 



Head immersed in prothorax up to the eyes ; the latter sometimes 

 free ; gradually narrowed, strongly emarginated in front. Epistomc not 

 distinct from the forehead. Eyes straight, narrowed in the middle, very 

 little prolonged on the forehead. AntenncB generally longer than the 

 thorax, their three last joints sub-globular, perfoliated, forming an 

 indistinct club. Prothorax transversal, regularly rounded, narrowed in 

 front and behind, its apex semicircularly excised, its base contiguous to 

 the elytra and feebly bisinuated. 



Elytra oblong, narrowed posteriorly ; their epipleurcE rather straight. 

 Legs long ; tibice with two unequal spurs. Prosternal process prominent, 

 the mesosternal concave in front, with an intercoxal process, triangular, 

 from the abdomen. Body oblong, moderately convex. 



665. O. Opacula, Bates ; Ann. Mag. Nat. Hist., Dec, 1873. 



Somewhat broadly oval, but little convex ; brownish-black, the elytra 

 usually with a tinge of dark chocolate- (or purplish) brown ; subopaque. 

 Head and prothorax finely and very closely punctured, the interstices 

 (except on the epistoma and disc of prothorax) a little elevated and 

 reticulate ; epistoma broadly truncated in front, the angles rounded, the 

 suture strongly marked at each side : prothorax deeply arcuately (some- 

 times slightly sinuously) emarginate in front ; front angles prominent, 

 subacute, slightly convergent ; base more or less strongly bisinuate-emar- 

 ginate ; the hind angles more or less produced, acute, directed behind 

 or sometimes a little outwardly, reposing on the shoulders of the elytra ; 

 sides gradually narrowing in a slight curve from base to apex, sometimes 

 ( $ ?) subparallel from the base to a little beyond the middle, thence 

 rapidly curvedly narrowed to the apex : usually they are very slightly 

 sinuous in front of the hind angles ; disc very moderately convex, lateral 

 margins rather broadly expanded, a little reflexed or concave, and un- 

 equally thickened at the edges ; base and apex more or less distinctly 

 margined or thickened at each side, sometimes throughout at the apex ; 

 a more or less distinct, transverse, angulate impressioa at each side of the 

 middle, close to the basal margin ; scutellum transversely curvilinearly 

 triangular, closely punctured : elytra more or less sinuate-truncate (and a 

 little wider than base of prothorax) at the base; a space, more or less open, 

 between the base of the elytra and base of prothorax ; sides very slightly 

 rounded, more or less gradually narrowed from the middle to the apex ; 

 expanded lateral margins wide, reflexed or concave, transversely and 

 somewhat reticulately rugose-punctate, and studded with small granules; 

 disc closely, finely, and rather uniformly punctured, the interstices 

 (especially at the sides) a little elevated and reticulate and studded with 

 indistinct minute granules ; a series of narrow longitudinal cost^e more 

 or less indicated, and an irregular row of rugged fovese, just within the 



