36 LE CONTE.— LONGICOKN COLEOPTERA 



1. C. PRODUCTus. — Valde elongatus, linearis, niger, thorace nitido, parce subtiliter punctato, profunda 



canaliculato, utrinque profunde impresso ; elytris rugose-punctatis, bicostatis ; antennis corpore vix 

 brevioribus: tuberculo infra oculum acuto. Long. -QS. 



Easily distinguished from the next by its narrower form, shining thorax, and long 

 antennee ; the costse of the elytra are sometimes undoubtedly obsolete. I have but 

 one specimen from Oregon, for which I am indebted to Mr. Wilcox. 



2. C. AGRESTis. — Piceus, thorace opaco, dense subtillissime punctato, vix canaliculato, impressione profunda 



basali, alteraque utrinque dorsali excavatis ; elytris obsolete bicostatis ; antennis corpore duplo 



brevioribus tuberculo infraoculari acuto. Long. 1-05. 

 Hald. 

 Call, agreste, Kirby, N. Z. 



Maine to Fort Laramie ; the antennae of the male are thinner but not longer than 

 those of the female. 



3. C. OBSCURUS7 — Piceus, thorace opaco, dense granulato-punctato, laterlbus valde rotundatis, impressionibus 



3, parvis notato ; elytris sat grosse punctatis, obsolete bicostatis, apice acutius rotundatis; sutura baud 

 prominula; tuberculo suboculare obtuso. Long. -QS. 



One specimen, Western New York. 



4. C. NTJBiLiJs. — Piceus, thorace opaco convexo, minus subtiliter scabro, lateribus modice rotundatis, disco 



baud impresso ; elytris grossius cribrato-punctatis, poslice subangustatis, apice latius rotundatis, sutura 

 paulo prominula. Long. -76. 



The antennae are somewhat longer than in the preceding, and the subocular 

 tubercle is obtuse. 



Group 12. 



This group recedes on the other hand towards the LepturidcB. It seems closely 

 related to the fifth group, especially Ehuria and Cerasphorus, but the palpi are more 

 elongated, and the antennae are situated at the base of the mandibles, entirely in front 

 of the eyes, which are simply transverse. The anterior acetabula are round and the 

 coxae large, the mandibles are truncate at the apex, with the edge acute. 



DISTENIA. 



Palpi maxillares labialibus duplo longiores. 



Thorax armatus, dorso callosus. 



Elytra apice acute bispinosa. 



Corpus depressiusculum, utrinque paulo angustatum. 



