Capt. P. P. King's South American Coleopteia. 189 



A single specimen, which appears to be immature, was found at Gorrite. 

 It seems to be allied to Achinpiis and Cratacauthiis, Dej., but the acute tooth of 

 the mentum distinguishes it from the former, and the habit does not assimi- 

 late with the latter genus. 



9. Pristonychus rufitarsis. Curt. 



Piceus ; antennis brunneis ; illarum basibus, trophis, femorum basibus tarsis- 



que castaneis ; capite thoraceque nigris ; elytris obscure violaceis. 

 Length 7 lines ; breadth '2\. 



Piceous : antennœ brown, 3 basal joints, trophi, coxœ, trochanters and tarsi 

 castancous : head and thorax bluish-black, the former with 2 foveae in 

 front, the latter with a deep channel down the middle, and a large fovea 

 near each hinder angle : p////ra dull violaceous, with fine strife obscurely 

 punctured, basal stria abbreviated, the costal deeply punctured, one or 

 two punctures between the 3rd and -1th striœ on the disc, 

 A male from Conception. 



10. Calathus Pennsvlvanicus. 



Ol'w. vol. iii. Gen. 35. p. 72. no. 93. pi. 8./. 92. 



A female from Gorrite. 



N. G. Metius. Cart. 



Caput suborbiculare : oculi prominentes. Thorax subquadrato-cordatus : .v(7<- 

 tellum elytra separans. Eli/fra elliptica, apice obsolete emarginata. Tibhe 

 anterlores pariim profunde emarginatœ : tarsi anteriores articulis 3bus 

 basalibus in mare diiatatis, obovato-truncatis. Antennœ graciles, caput 

 thoraccmque arquantes ; articulo basali reliquis crassiore, 2ndo baud brevi, 

 3tio et sequentibus longis. Labrum subprofunde emarginatum : man- 

 dihuhe breves, validfe. Palpi articulo apicali penultimo breviore, elliptico- 

 truncato : ineiitam simplex, late emarginatum. 



Labrum slightly transverse, strongly emarginate, with a few bristles. Man- 

 dibles strong and curved. 3Iaxl/lari/ palpi with the 3rd joint scarcely so 

 long as the 2nd, 4th shorter, elliptic-truncate (IGp) : labial palpi with 

 the 3rd joint shorter than the 2nd, and similar in size and form to the 

 maxillary. Mentum with a broad notch, the centre slightly convex (17). 

 VOL. xviir. 2 c 



