230 PROCEEDINGS OP THE ACADEMY OF 



slender, not compressed; tarsi longer than the tibiae, narrow, first joint elon- 

 gated, last joint short, somewhat dilated, claws slender. Abdomen with the 

 ventral segments not connate, equal in length, tip of fifth segment conical, 

 and prominent in both sexes. 



The last joint of the maxillary palpi is elongated, and obtusely subtruncate 

 at tip. 



This genus seems closely allied to Oligomerus, but the anterior coxae are 

 somewhat separated, and the antennae are very different. The elytra are 

 striate, and the punctures of the inner striae are confused, as in Oligomerus 

 sericans. 



I. Ct. antennatum. Elongatum, cylindricum piceum opacum, pube 

 subtili sericea vestitum, thorace latitudine sesqui breviore, dense subtiliter 

 scabro. lateribus cum basi late rotundatis, disco fere ad basin canaliculato, 

 dein acute elevato, basi vage 4-impresso, elytris thorace 4-plo longioribus, 

 Btriis punctatis, externis profundis, internis subconfusis ; antennis pedibusque 

 ferrugineis. Long. -20 -25. 



Mas antennis corporis dimidio longioribus, articulis intermediis longius 

 pectinatis. 



Femina antennis corporis dimidio fere brevioribus, articulis intermediis 

 breviter pectinatis. 



Virginia: four specimens kindly given me by Dr. S. Lewis. The sides of 

 the thorax are not serrate, the reflexed margin is very narrow, and extends 

 around the anterior angles upon the apex. The disc is convex, gibbous, 

 strongly channelled until within a short distance of the base, where it is in- 

 terrupted by the gibbositv ; the latter is bounded behind by two converging 

 impressions, outside of which on each side is a feeble elevation, and then a 

 transverse impression, extending to the sides. The hind angles are not ob- 

 vious. The internal striae of elytra are not impressed, and their punctures 

 are confused ; the striae near the margin are impressed and regular punctured. 



PTINODES Lee, Class. Col., 204. 



Body elongate, convex, pubescent, and clothed with long, erect hairs. Pro- 

 thorax excavated beneath for the reception of the head, disc gibbous, not 

 channelled. Eyes convex, moderate in size, prominent. Antennae, rather 

 stout, joints 3 8 nearly equal, the outer ones slightly transverse ; ninth 

 and tenth each longer than the three preceding, and somewhat wider, oblong ; 

 eleventh a little longer, oval. The ninth to tenth somewhat longer than all 

 the preceding united. Prothorax narrowed behind, not contiguous to the 

 trunk ; prosternum obtusely truncate behind, separating widely the anterior 

 coxae, Avhich are conical and prominent; middle coxae prominent, well sepa- 

 rated by the mes"osternum, which is truncate (?) behind ; metasternum not 

 sulcate ; hind coxae with the plate very narrow, scarcely visible. Abdomen 

 with the ventral segments smooth, sparsely hairy, not connate, the fourth 

 shorter than the others, which are equal. Thighs strongly clavate, tibiae not 

 compressed, with external rows of long hairs ; tarsi shorter than the tibiae, 

 stout, first joint very slightly elongated, fifth joint dilated, claws broadly di- 

 lated at base. 



The separation between the prothorax and trunk, as well as the clavate 

 femora, easily distinguish this genus, and cause the resemblance to Ptinus, 

 which has suggested the name. 



1. Pt. setifer Lee, Class. Col., 205; Anobium seiiferum Lee, Proc. Acad. 

 Nat. Sci., 1858, 73. 



One specimen was collected by me at San Diego, California. 



TRICHODESMA Lee. 

 Body oblong, rather stout, pubescent, and clothed with erect setae and tufts 



[Oct. 



