96 DESCRIPTIONS OF NEW SPECIES. 



are three species known to me in which the elytra are gradually 

 dilated from the base, and the humeral angles are obsolete : — 



1. G. angustata, in which the sides of the thorax are very 

 feebly Insinuate, and the elytra are irregularly varied with testa- 

 ceous and fuscous, the surface of the thorax is tolerably densely 

 and not rugosely punctured, and the elytra finely punctulate, with 

 the rows of punctures obliterated at one-fourth from the tip. 



2. G. ovipennis, with the sides of the thorax strongly bisinuate, 

 the surface less densely and somewhat rugosely punctured ; the 

 elytra with a medial band and tip paler, the surface sparsely 

 punctulate, and the rows of punctures obliterated near the tip. 



3. C. pilosejla, agreeing with the last, except that it is of 

 smaller size, with the anterior sinuosity of the thorax rather less 

 marked, and the surface more punctured and rugose : the rows of 

 punctures of the elytra, though less deep, are not obliterated 

 behind. 



CL<ER.US Geoffrot (emend. Kiesenw.). 



340. C tantillus. Elongatus, cylindricus, castaneo-rufus nitidus, 

 parce pilosus, capite thoraceque fortiter sat dense punctatis, hoc lati- 

 tudine longiore lateribus subrectis obsolete serratis, ad basin subito 

 oblique angustato, angulis posticis minutis obtusis ; elytris pone basin 

 vage impressis, punctis ante medium majoribus, pedibus testaceis. 

 Long. -08. 



One specimen, collected at Washington, D. C, and given me 

 by Baron R. Osten Sacken. This is the smallest species of the 

 family Gleridse known to me. It is quite different from G. san- 

 guineus Say, by the coarser punctures of the head and thorax, as 

 well as by the narrower form, which is similar to Priocera, or 

 Tarsostenus. The anterior tarsi are somewhat dilated, while the 

 posterior ones are narrow, without distinct membranous lobes ; 

 I therefore consider it as belonging to the division Thaneroclerus 

 Spin., although it differs from that as from all other species of 

 Clerus by the hind angles of the thorax being distinct, though 

 obtuse. The ungues are quite simple. 



The lateral serration of the thorax is produced by the punctures 

 upon a very obsolete margin ; the sides of the prothorax beneath 

 are coarsely punctured, with a smooth shining space near the 

 coxse: I do not observe more than four joints in the hind tarsi, 

 neither a short basal one, nor a small fourth joint being visible. 

 More favorable examination of other specimens may indicate (he 



