OF AMERICA NORTH OF MEXICO. HI 



Northern California; Dr. Stout. The thorax is narrowed in front, scarcely twice 

 as wide as long, and more than twice as wide as the head posteriorly; the lateral 

 spiculse are very acute and irregular ; the elytra show some indications of costse, but 

 the specimen appears a little immature ; the sutural spine is distinct; the joints of 

 the antennae are marked with a few scattered punctures. 



MALLODON Serv. 



Mesosternum simplex. 



Antennse ll-articulatas, tenues, articulo 3'" baud longiore. 



Palpi breves. 



Tborax lateribus serratus, vel multispinosus. 



Tibiae compressae, angulo externo omnium producto. 



The sexual characters of the species of this genus have not been clearly made out, 

 and there is consequently much confusion in the tropical species. Our own species, 

 although described, have been confounded with Brazilian species, to which they bear 

 but little resemblance. 



1. M. CILTPES. — Nigro-picea, nitida, thorace antrorsum subangustato, lateribus serrato, angulo postico 



prominulo, lateribus scabro, dorso vage impresso, parce injequaliter punctato, elytris punctatis • 

 mandibulis capita brevioribus, tibiis intus flavo-ciliatis. Long. 1-5 — 2-1. 

 Hald. Appendix, 371. » 



Prionus cilipes, Say. Journ. Ac, Nat. Sc. 3, 327. 

 Mallodon simpUcicoUe, Dej. Cat. Hald. 30. 



Mas, antennis corporis dimidio paulo longioribus; femoribus, tibiisque anticis valde exasperatis. 

 Femina, antennis corporis dimidio brevioribus, pedibus omnibus parce punctatis. 

 Georgia and Louisiana; Say found it in Missouri Territory. The mandibles are 

 shorter than the head in both sexes; in the male they are bounded internally towards 

 the apex by a straight line ; in the female they are toothed ; the punctures on the 

 disc of the thorax are sometimes large and sometimes small. 



2. M. COSTULATA. — Depressa, nigro-picea nitida, capite varioloso, thorace antrorsum subangustato, lateribus 



multispinoso, angulo postico prominulo, disco Isevigato, versus latera parce varioloso lineis duabus 

 brevibus elevatis, elytris fere impunctatis ; mandibulis capite brevioribus, intus parce rufo-villosis, 

 tuberculo suboculari subacute. Long. 1-2 — 1-7. 

 Mallodon spiniharhe, Hald. 31. 



Georgia; rare. The descriptions of Linnaeus and Fabr. (Ent. Syst. 1, 2, 249) do 

 not apply to our species, which has short mandibles, acute at the apex, with two or 

 three small, indistinct teeth. The subocular tubercle is somewhat acute, and is 

 emarginate externally ; it could never be called " spinoso." The disc of the thorax 

 has slight impressions, and is separated from the interior of the elevated lines by a 

 line of large punctures; the exterior elevated line is oblique towards the basal angle. 

 I have not yet discovered any sexual characters in this species. 



