142 Coleopterological Notices. 



OCHROLITIJS Sharp. 



This genus is well distinguished from either of those which pre- 

 cede by the structure of the prosternal process, which is here more 

 developed, projecting beyond the anterior coxae, having the apex 

 free, with an acute edge which is transversely arcuate. 



The two species described below differ generically. I did not 

 receive the type of tristriatus until a time subsequent to the print- 

 ing of the table of genera, given on page 91, and had previously 

 regarded ritbens as a typical form of the genus; it is therefore 

 undesirable, at present, to create a new genus for the latter species, 

 although this must be doire when the family is monographically 

 revised. The species are very easily distinguishable as follows: — 



Prosternal process moderate in width, feebly, longitudinally convex, extending 

 but slightly beyond the coxae, the apex moderately dilated, very feebly 

 arcuate, unarmed. Mesosternum not developed behind the middle ace- 

 tabula. First joint of the posterior tarsi much longer than the next two 

 combined. Discal striae three in number tristriatllS 



Prosternal process wider and longer, jjrojecting distinctly beyond the cox<e, 

 flat, spatuliform, the apex very strongly rounded and bearing a series of 

 five or six long spinose setae. Mesosternum developed as a short arcuate 

 plate behind the middle acetabula. Basal joint of the posterior tarsi 

 shorter, subequal in length to the next two together. Discal stri<E two in 

 number ril1)eilS 



O. tristriatus n. sp. — Oval, very convex, rather more than one-half 

 longer than wide, widest near the base of the elytra, the sides thence very 

 feebly convergent behind ; upper surface shining, dark piceo-rufous, the elytra 

 slightly opalescent; beneath paler, rufo-testaceous. Head not reticulate, very 

 finely but distinctly and rather densely punctate ; eyes moderate ; antennae 

 long and well developed, second joint small, much shorter than the third, the 

 latter equal in length to the fourth and but slightly longer than the fifth, 

 eighth but slightly wider than the seventh, scarcely as wide as long ; club 

 nearly symmetrical, rather loose, as long as the five preceding joints combined, 

 ninth joint very slightly longer than the tenth and fully two-thirds as long as 

 the eleventh, Prothorax large, but slightly more than twice as wide as long, 

 the base very feebly incurvate between the basal angles, the basal lobe rather 

 wide but excessively feeble, the bead completely obsolete ; surface not reticu- 

 late, extremely minutely and moderately sparsely punctate, the tine hairs 

 unusually long and distinct. Scutellum triangular, nearly twice as wide as 

 long. Elytra scarcely more than twice as long as the prothorax, tlie apex 

 evenly, semicircularly rounded, excessively minutely and densely strigilate, 

 the lines not resolvable under a power of 80, having long transverse very 

 distinct, and anastomosing scratches, from which arise the tine but rather 



