AMERICAN COLEOPTERA. 301 



cooperi and magister in general facies that it would surely be placed 

 near them in a cabinet arrangement; in fact the specimen here de- 

 scribed had been labeled cooperi by Mr. Fuchs, in whose collection 

 the type remains. In addition to the sculpture of the head and 

 thorax, the greater difference in the size of the hind tibial spurs, 

 and the sexual differences of antennae and abdomen, margarita is 

 further distinguished from cooperi by the head not being sinuate 

 behind and by the much stouter less compressed tibiae. The type is 

 from Santa Margarita Island, Lower California. 



C inorora. sp. nov. — Black, glabrous, shining. Head and thorax polished, 

 with very few fine scattered punctures, elytra finely scabrous. Antennae ( "^ ) a 

 little longer than the head and thorax, with joints 4-7 much enlarged, 8-10 sub- 

 globular, the eighth a little elongate. In the female the antennse are shorter and 

 gradually incrassate as usual. Head quadi-ate ; thorax as wide as long, subpenta- 

 gonal, with side angles rounded ; disk quadri-impressed, the lateral impressions 

 sometimes obsolete. In the male the middle tibife are distinctly compressed near 

 the apex; the fifth ventral is distinctly sinuate at middle, the sixth with a broad 

 deep rounded emargination, the lateral lobes acutely prominent. The outer spur 

 of the hind tibiae is obviously stouter than the inner, but the difference is not as 

 strongly marked as in many species. Length 15-19 mm. 



Hab. — California, San Bernardino, Riverside (Temecula) and 

 San Diego (Warner's Ranch, Poway) Counties. Collections of 

 Dr. Blaisdell and Mr. Fuchs. 



C fiinerea. sp, nov. — Black, glabrous; head and thorax shining, nearly 

 impunctate; elytra feebly but not very finely scabrous, somewhat shining. An- 

 tennae ( 'S ) a little longer than the head and thorax, joints 4-6 enlarged, tlie 3rd 

 and 7th also a little dilated, 8th a little narrower than the seventh and slightly 

 elongate, 9th and 10th about as wide as long. In the female the antennae are 

 rather shorter than the head and thorax and gradually stouter, the outer joints 

 about as wide as long. Thorax a little narrower than the head, suboval, sides 

 broadly rounded, a little more strongly so in front: disk moderately and nearly 

 evenly convex, with a feebly impressed or subobsolete median line. Legs slen- 

 der, anterior tibiae of % with two spurs, outer spur of hind tibiae stouter than the 

 inner, broader and concave at tip. Fifth ventral ( % ) truncate, sixth broadly 

 arcuately emarginate, the lateral lobes slightly prominent; pygidium rounded at 

 apex. Length 13-18 mm. 



Hab. — California, Lake, Sacramento and Tulare Counties. 



One $ in Dr. Van Dyke's collection, and 2 females submitted by 

 Mr. Fuchs are all I have seen of this species. It resembles several 

 other black species in a superficial way, but is easily separated from 

 all others by the form and sculpture of the thorax, combined with 

 the sexual characters of the antennae and abdomen. Its nearest 



TRANS. AM. ENT. SOC, XXVII. AUG., 1901. 



