390 Memoirs on the Coleoptera 



inserted only a little behind apical third in the male, the club 

 narrowly oval, with its basal joint unusually long, constituting 

 about two-thirds of the mass. The anterior coxae are narrowly 

 separated, the spines arising before them sharp, moderate in length 

 and nearly straight. The prosternal surface is wholly unmodified, 

 excepting a fine feeble canaliculation, barely observable under the 

 dense crust of pale scales. The humeral prominence is distinct, 

 the scutellum gmall and subquadrate, enlarged slightly toward the 

 emarginate apex. The third tarsal joint is greatly dilated and 

 bilobed, the mandibles very small but conforming well with those 

 of Cenirinaspis and allied forms. 



Linogeraeus n. gen. 



A number of tropical species may be separated under this name; 

 they differ greatly from any of the other associable forms, in 

 having clearly defined dense vittae of pale scales on the upper 

 surface, rendered conspicuous on the black background. The body 

 is rhomboid-oval, the pro thorax not abruptly constricted at apex, 

 the beak rather long, usually more or less thickened at base in the 

 female, the antennae long with narrowly oval club, the anterior 

 coxae moderately separated, the prosternal surface not greatly 

 modified, and the ante-coxal spines of the male are long, straight 

 and porrect as in lineellus, or shorter and less porrect as in trivittatus. 

 The type of the genus is Centrinus lineellus Lee. Gerceus tceniatus 

 Chmp., will also enter this genus and probably albolineatus as well. 



There are several species allied to lineellus, of which the following 

 is one that seems to have been overlooked hitherto: 



*Linogeraeus merens n. sp. — ^Subrhomboid-oval, convex, black, densely 

 clothed throughout with broad oblong decumbent scales, which are white 

 on the prothorax, excepting a narrow brownish-black vitta at each side 

 and two submedian, which are much narrower than the white vittae; 

 on the elytra the second interval is densely white throughout, the third 

 also, except in basal fifth, the fourth from base for four-sevenths, and the 

 sixth, seventh and eighth almost entirely, white, the sutural and fifth 

 are virtually wholly brownish-black; the under surface has dense whitish 

 scales throughout, these radiating on the prosternum from a point near 

 the apex; beak in the female strongly arcuate, cylindric, scarcely at ail 

 thickened basally and slightly longer than the head and prothorax, 

 loosely punctate, the antennae inserted at the middle; prothorax a third 

 wider than long, the sides evenly converging and very evenly arcuate 

 from base to apex, the non-tubulate apex half as wide as the base, the 



