BY MALCOLM CAMERON. 437 



OSORIUS SPARSIFRONS n. sp. 



Black, shining, elytra castaneous : declivons part of head 

 not strigose, finely and sparingly asperately punctured, not 

 coriaceous, supra-ocular region extremely finely strigose ; 

 vertex at the sides with interrupted striae, in the middle with 

 a few very fine elongate and ordinary punctures moderately 

 closely placed : base punctured. Thorax transverse, the 

 anterior angles prominent, the sides straight ly narrowed to 

 the rounded posterior angles, adjacent to which is a broad, 

 somewhat obsolete impression, finely, not very closely 

 punctured on the disc, more coarsely more closely towards 

 the sides, very shining and not coriaceous. Elytra longer 

 than broad irregularly wrinkled, not coriaceous. Abdomen 

 coriaceous, finely and sparingly punctured. Antenn;L' reddish- 

 testaceous, all the joints longer than broad, the penultimate 

 only slightly so. Legs ferruginous. Lfcngth 7 mm. Similar 

 in build to the preceding, but smaller and more shining, the 

 sculpture of the declivous part of the head is similar to that 

 of 0. frontalis Fauv., but finer. 



Baram district, a single specimen. 



OSORIUS ASPERIFRONS n. sp. 



Black, moderately shining; front of head rather closely 

 a^erately punctured; vertex entirel}' longitudinally striate, 

 the striag rather broad, the base impunctate and coriaceous. 

 Thorax scarcely transverse, the sides scarcely rounded 

 anteriorly, feebly emarginate before the rounded posterior 

 angles, the anterior angles not prominent ; posterior angles 

 with a small fovea, middle line narrowly impunctate the rest 

 of the surface closely, rather finely asperately punctured. 

 Elytra longer than broad, closely and more coarsely asperately 

 punctured than the thorax. Abdomen rather finely, rather 

 closely punctured, coriaceous. Antennte with the first two 

 joints reddish testaceous, the rest black, 3rd joint shorter 

 than 2nd, 4th and 5th small, moniliform, 6th to 10 larger, 

 moniliform. Lesgs pitchy-brown. Length 5 mm. Very 

 similar in size and build to 0. frontalis Fauv., but the 

 declivous part of head more closely asperate, the vertex 

 distinctly striate, thorax a little narrower, less distinctly 

 emarginate before the posterior angles and the puncturation 

 much denser and asperate both on this and the elytra. 



Baram district, a single specimen. 



