Capt. P. P. King's South American Coleoptera. 189 ! 



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

 It seems to be allied to Acinopus and Cratacanthus, 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 obscur^ violaceis. 

 Length 7 lines ; breadth 2^. 



Piceous : antennae brown, 3 basal joints, trophi, coxee, trochanters and tarsi 

 castaneous: head and thorax bluish-black, the former with 2 fovese in 

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

 near each hinder angle : elytra dull violaceous, with fine striae obscurely 

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

 two punctures between the 3rd and 4th striae on the disc. 

 A male from Conception. 



10. Calathus Pennsylvanicus. 



Oliv. vol. iii. Gen. 35. p. 72. no. 93. pi. 8./. 92. 



A female from Gorrite. 



N. G. Metius. Curt. 



Caput suborbiculare : ocuU prominentes. Thorax subquadrato-cordatus : scu- 

 tellum elytra separans. Elytra elliptica, apice obsolete emarginata. Tibice 

 anteriores parum profunde emarginatae : tarsi anteriores articulis 3bus 

 basalibus in mare dilatatis, obovato-truncatis. Antennce graciles, caput 

 thoracemque aequantes ; articulo basali reliquis crassiore, 2ndo baud brevi, 

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

 dibulce breves, validae. Pa/pi articulo apicali penultimo breviore, elliptico- 

 truncato : mentum simplex, latfe emarginatum. 



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

 dibles strong and curved. Maxillary palpi with the 3rd joint scarcely so 

 long as the 2nd, 4th shorter, elliptic-truncate (16/>) : labial palpi with 

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

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

 VOL. xviii. 2 c 



