492 Colcopierological JSIoticets, VII. 



the front between the antennae, may possibly prove to be influ- 

 enced somewhat by sex in extent of development. 



CATALINUS n. gen. 



This genus has for its type, and only representative thus far 

 known to the writer, a small, very slender and linear species, de- 

 scribed by LeConte under the name Scydmaenus angustus. It is 

 unmistakably allied to Scydmaenus in general organization, but 

 differs especially in the form and structure of the prothorax. 

 The eyes are subbasal, the palpi normal, with the fourth joint 

 slender and aciculate, and the scutellum very small and in great 

 part hidden by the arcuate base of the pronotum. The elytra 

 are evenly and broadly rounded or subtruncate at tip, with the 

 sutural angle right and only minutely blunt, entirely covering the 

 dorsal pygidium and mutually overlapi^ing ou the suture toward 

 apex, though only to an extremely slight degree. The charac- 

 ters of the under surface ai'e those of Scydmaenus, except that the 

 last ventral segment is not unusually developed ; the hind coxae 

 are very approximate, and the posterior tarsi moderate in length, 

 with the four basal joints subequal. 



The prothorax is evenly obovoidal, with rounded base and 

 more broadly rounded apex, and is wholly devoid of auy trace of 

 subbasal impressions or lateral foveae. 



1. C. angustus Lee. — Proc. Acad. Nat. Sci., Phila., 1852, p. 153 

 (Scydmaenus). 



Linear and onlj- slightly convex, polished, subimpunctate, black 

 or blackish with dark rufo-testaceous legs and antennae, the last 

 two abdominal segments also slightly pale ; pubescence moderately 

 abundant, indistinct anteriorly, very short, cinereous and closely 

 recurved on the elytra. Head well developed, transverse, evenly 

 couA^ex and unimpressed, the e^^es moderate in size, convex but 

 not verjT^ prominent, the tempora short and moderately rounded 

 to the neck, almost continuous with them in curvature ; neck 

 wide ; clypeus moderately developed, paler in color, broadly and 

 continuously arcuate at tip, porrect with regard to the strongly 

 declivous front ; labrum small, transverse ; mandibles moderate. 

 Antennae rather longer than the head and prothorax, with a dis- 

 tinct 3-jointed club ; second joint much shorter and slightly nar- 

 rower than the first, f longer than wide, narrowed toward base, 

 not quite as long as the ne?:t two and but slightly thicker ; three 



