On new Coleoptera from Costa Rica. H5 



XX. — Descriptions of some new Coleoptera from Costa Rica. 

 Bj C. J. Gahan, M.A., Assistant, Zoological Department, 

 British Museum. 



]\roNSlEUK H. PiTTiEE DE Fabreqa, Director of the Institute 

 Fisico-Geografico Nacional de Costa Rica, has forwarded to 

 Dr. Giinther two or tliree small collections of Coleoptera, 

 which wei-e for the most part made on the little-explored 

 Pacific slope of that country. With the aid of the splendid 

 collections of Central-American Coleoptera presented to the 

 ]\Iuseum by Messrs. F. D. Godman and O. Salvin it has not 

 been difficult for me to identify the large majority of the 

 species sent by M, Pittier ; but there still remain a few forms 

 which I have been unable to find in those collections and 

 which do not seem to be referable to any described species. 

 These I now describe : for one — an interesting species of 

 Carabida3 — I have found it necessary to institute anew genus. 



Carabidae. 

 Leptotomus, gen. nov. 



Somewhat ovate or elliptic in outline. Head with two 

 setigerous punctures above each eye ; clypeus with a seta 

 near each of the antero-lateral angles ; labrum eraarginate, 

 sex-setose along margin ; scrobe of mandible devoid of setai ; 

 nieutum emarginate, without tooth ; ligula ending in a free 

 median chitinous process, at the sides of and beyond which 

 project the membranous lateral lobes (paraglossaj), which are 

 rounded at tip ; second joint of labial palpi bisetose near its 

 extremity. Pronotum with a rather long seta near each of 

 the hind angles. Elytra rounded at apex, their surface 

 covered with very fine close longitudinal and parallel strige, 

 almost microscopic in character ; each elytron with a row ot 

 setigerous punctures along the outer margin. Fore tibia? 

 emarginate; first four joints of fore tarsi (cJ?) slightly 

 expanded, subspinose underneath. Antennae rather short, 

 first three joints glabrous, the rest pubescent ; first joint 

 about equal in length to the second and third united; these 

 joints subcylindrical ; the joints from the fifth to the tenth 

 each about as broad as long, the eleventh slightly longer but 

 scared}^ narrower than the tenth. 



The short and ovate form of this genus suggest a position 

 for it near Barysomus and Bradyhceus. 



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