AMERICAN COLEOPTERA. 259 



feebly arcuate, surface moderately shining not densely punctate. Elytra very 

 little wider than the thorax, narrower behind, sutural stria feebly impressed, 

 surface rather shining, not densely punctate. Body beneath moderately densely 

 punctulate. Length .12 — .16 inch; 3 — 4 mm. 



The anterior femora beneath are rounded, not flattened, without 

 trace of tubercle. In the male the anterior tarsi are moderately 

 dilated and the first joint of the middle evidently thickened. The 

 anterior tibiae male have a slight sinuation within. In the females 

 the fifth and sixth ventral segments are rather deeply longitudinally 

 impressed at middle. 



This species, the Spenciana of our lists, is so plainly the species 

 intended by Say, that I have no hesitation in using his name. 

 Murray has already indicated the synonymy of cadaverinus Mann., 

 and I find brunnipenms Mann, not difi'ering. Types of the last two 

 are before me. 



This is the most widely distributed species known to me. It 

 extends from Alaska to California and Nevada to the Lake Superior 

 region. White Mountains and as far south as the Middle States, with 

 some variation in color and lustre. 



C. clavicornis Lee. (Catops). — Oval slightly oblong, brownish-piceous, 

 elytra sometimes paler, pubescent. Head moderately coarsely not densely 

 punctate. Antennae a little shorter than usual, scarcely attaining the hind 

 angles of the thorax, piceous, apical and two basal joints paler. Thorax twice 

 as wide as long, narrowed in front, sides rather strongly arcuate, apical angles 

 rounded, the basal obtuse, base feebly arcuate, surface moderately densely 

 punctate with a tendency to the formation of short transverse strigose. Elytra 

 oval, gradually arcuately narrowed to apex, not wider than the thorax, sutural 

 stria finely impressed, surface moderately densely punctate. Body beneath 

 densely punctulate. Femora faintly strigose. Length .10 — .12 inch. 



The femora beneath are rounded and not flattened. The anterior 

 tibiae of the male are not sinuate within the tarsi moderately dilated. 

 The first joint of the middle tarsus is also moderately thickened. 

 In the female the fifth and sixth ventral segments at middle have a 

 feeble longitudinal impression. 



This species has been improperly placed as a synonym of hrunni- 

 pennis = hasillaris but it is very distinct. In outline it has the 

 margins of the thorax and elytra almost continuous, the antennae are 

 shorter and finally the sexual characters diff"er. 



Occurs from Michigan to Texas, Middle States to Colorado. 



C. decipiens n. sp. — Oblong-ovjl, brownish, pubescent. Head finely 

 sparsely punctulate. Antennae piceous, pale at base. Thorax a little less than 

 twice as wide as long, narrowed in front, sides arcuate, apical and basal angles 

 rounded, the former, however, more distinct, base broadly arcuate, surface 



