INSECTS COLEOPTERA. 41 



One specimen, California, Dr. Heermann ; given me by Mr. Haldeman. As the oral organs 

 and the abdomen are destroyed, I cannot tell whether this genus belongs to the Dynastides or 

 Geotrapides ; in either case the four-jointed antennae club is equally remarkable. The affinities, 

 as far as I can understand them, seem to be rather with Geotrupes. 



CANTHON Illiger. 



C. simplex, latiusculus, minus convexus, niger alutaceus opacus, thorace lateribus integer- 

 rimis, medio angulatis, disco parce subtiliter punctato, elytris parce subtilius punctatis, striis 

 obsoletis vix impressis; crypeo antice reflexo, sexdentato, dentibus mediis magnis, lateralibus 

 parvis; pedibus anticis in fossulis haud receptis. Long. 22 36. 



Oregon and California. Kesembles in appearance C. nigricornis, but the elytra are less 

 narrowed behind. The small tubercle, which interrupts the margin of the thorax on the under 

 surface before the middle in the other species, is here entirely wanting, and the under surface is 

 hardly excavated for the reception of the anterior feet. 



APHODIUS Illiger. 



A. pectoralis, oblongus convexus, niger nitidus, capite subtiliter punctulato, quadri-tubercu- 

 lato, clypeo tenuiter marginato, lateribus obliquis ante late truncate, thorace punctulato et 

 disperse punctato, ante medium subangustato, et lateribus modice rotundato, ad basin late 

 rotundato et subtiliter marginato, angulis posticis obtusis, elytrorum striis crenulatis, interstitiis 

 subplanis, vix obsoletissime punctulatis; mesosterno alutaceo, ad medium striolato. Long. *21. 



One specimen, San Francisco. The terminal fringe of the hind tibire is formed of spines 

 equal in length, and the species belongs to the same division (G. of Erichson, Ins. Deutschl. 

 814,) as A. congregatus and ursinus; the only representative in the Atlantic States is the intro 

 duced A.foetidus Fabr. (tenellus Say.) The tubercles of the head are very distinct, the anterior 

 one is a small transverse carina, and the three posterior ones are connected by an indistinct 

 elevated line. 



A. rubidus, oblongus ferrugineus, nitidus, clypeo antice bicuspi, medio late emarginato, laevi, 

 thorace antrorsum subangustato, lateribus rotundatis, angulis posticio valde rotundatis, disco 

 parcius punctato, punctulis vagis intermixtis, elytris striis profundis crenulatis, interstitiis vage 

 punctulatis. Long. 28 32. 



San Francisco, not common. Resembles A. laevigatus, and belongs to the same division of 

 the genus ; the clypeus is more emarginate, and the angles are subacute ; the thorax is distinctly 

 narrowed in front and punctured as in A. oblongus; the striae of the elytra are more finely 

 crenulate than in either. 



A. pardcdis, niger oblongus, clypeo testaceo-nebuloso punctulato, antice vix late emarginato, 

 thorace lateribus cum angulis rotundatis, subtilius vage punctato, punctisque maioribus inter 

 mixtis, lateribus late testaceis ; elytris testaceis nigro variegatis, striis fortiter punctatis, inter 

 stitiis paulo convexis, obsolete vage punctulatis, pedibus flavis. Long. 16. 



San Francisco. Resembles A. served Say; the clypeus of the male has three posterior tubercles 

 and a slight anterior transverse elevation. 



A. subaeneus, oblongus, aeneo-niger, nitidus, clypeo subtiliter punctato, late emarginato, 

 thorace subtiliter punctato lateribus, antice rotundatis pone medium parallelis, angulis omnibus, 

 6 Q 



