128 GEO. H. HORN. M. D. 



punctate, the margins not reflexed. It should be associated with lenco- 

 stxctus in the section Brilocnemis. It is a more elongate species than 

 the latter and with a different form and sculpture of mentum. 



One specimen from Arizona, kindly given me by Mr. L. E. Ricksecker. 



Contributions to the Coleoptt'roloK.v of tho 1 nited ^itate!«. 



(No 4.) 



BY GEORGE H. HORN, M. D. 



In the initial paper of the present volume Dr. LeConte remarks that 

 it includes descriptions of nearly all the imjiortant material in his collec- 

 tion, and that previous papers by me exhausted nearly all undescribed 

 species in my cabinet. 



It has been my custom to avoid, as far as possible, the description of 

 isolated species, except in the case of those belonging to very recently 

 monographed families, allowing the others to accumulate until their num- 

 bers render it advisable to prepare essays of a more or less monographic 

 character. 



The quantity of new material has at last become too great to neglect 

 and the present contribution has been prepared, at the same time the 

 principle above mentioned has been almost strictly adhered to. Several 

 portions which were originally part of the present paper have been sepa- 

 rated under independent titles more expressive of their contents. 



The typical specimens of all the new species which follow are in my 

 cabinet. 



CARABID.^. 



CAL.OSOMA Weber. 



C. Iflorrisonii n. sp. — Black, moderately shining. Head moderately closely 

 punctate, rugulose at the sides, mandibles transversely wrinkled. Thorax twice 

 as wide as long, base and apex nearly equal, sides strongly arcuate in front, ob- 

 lique behind, hind angles very obtuse, lateral margin narrow in front, more widely 

 reflexed posteriorly, the basal impressions moderately deep, apex feebly, base more 

 distinctly emarginate, median line distinct, surface moderately closely punctate 

 and more rugulose at the sides and along the base. Elytra oval, widest behind 



