62 JOHN L. LE CONTE, M. D. 



is the same as C. alternatus Motsch. ; while the other large species 

 liavint; three joints of the male front tarsi papillose, and which I re- 

 gard as the true rriifri'co>iiis, is ('. ondis Motsch. 



PROMECOGNATHUS Chaud. 



P. crassus, uigor uitidus, thoraco latitudine vix sesqui longiore. pustict* 

 rtiigubtato, et lateribus siiiuato, angulis posticis rectis, apioe quam basi fen- 

 duplo latiore ; elytris ovalibus tlio.raeooonspicue latioribus, latitudine vix sesqui 

 longioribus, huineris fortiter rotundatis, dorso versus sutui-am obsolete seriatim 

 puuctatis. Long. l()-5 — 16 mm. 



(Jalifornia. Varies greatly in size, the smallest specimen being scarcely 

 longer than P. liirriAsimus."h\it proportionally much stouter. The ely- 

 tra in the la^;t named species are more than one-half longer than their 

 width, while in P. rrassus they are very distinctly broader, being only 

 about one-third longer than their wiikh. 



The episterna of the mesothorax in all of the specimens of both 

 species before me. attain the middle coxal cavities as distinctly as in 

 any species of Sea rites'^'' which I have examined ; not at all as in Mis- 

 codera and other Broscini, in which they are completely cut off from 

 the coxal cavities. 



SIMPLOCARIA Marsh. 

 S. inflata. rotundato-ovata, valde convexa, nigro-aenea nitida. pilis pallidis 

 subtilibus erectis vestita, capite thoraceque subtiliter punctatia ; elytris punctu- 

 latis,haud striatis; subtus piceo-testa^ea, pedibus autennarumque basi dilutiori- 

 bus, liis articnlis 5 ultimis obscuris. Long. 4"5 nun. 



One specimen, California. This species is easily known by its very 

 inflated form, resembling in otitline Amphici/rtd simplicipes. The 

 head is more strongly punctured than the thorax ; the latter is at base 

 more than twice as wide as its length ; it is strongly narrowed in front, 

 and much rounded on the sides, the apex is broadly I'ounded at the 

 middle, and the base is truncate; the apical angles owing to the com- 

 pression of the sides appear sharp and narrow, the basal angles are 

 nearly rectangular. The elytra are feebly and finely punctured, a little 

 wi<ler than the thorax, and but little longer than their width, much 

 <leflexed behind, and conjointly rounded at tip. 



S. nitida Motsch., from Alaska, resembles this species in pubescence, 

 but is very much narrower, and the elytra are more distinctly punc- 

 tured. 



On comparing a specimen of S. )iiffidlica, from Kenai, with the 

 unique from Lake Superior, upon which I established S. teasclata, 



* Conf. Schauni, Berl. Entom. Zeitsehr., 1864, 124j where this opinion is di."*- 

 puted, and the affinities with Broscus defended. 



