340 G. II. HORN, M. D. 



Teeth of anterior tibise obsolete; hind angles of thorax very 



feeble depressus, n. sp. 



Anterior tarsi normal. 



Legs moderate, ambulatorial, tarsi as loug as tibise and only very feebly 

 compressed. 

 Shining species; apical angle of anterior tibia; prolonged. 



Thoracic disc with deep groove on eacli side: hind angles spini- 



form saucius, Lee. 



Thorax not grooved angles nodiforin niteus, Lee. 



Opaque species ; apical angle not longer than upper tooth. 



Head and thorax glabrous Knochii, Lee. 



Head and thorax pilose pilosicoUis, n. sp. 



Legs short, compressed, decidedly fossorial, tarsi short, not as long as 

 tibife, strongly compressed, claws small. 



Hind angles limited within by an impressed line angularis, Lee. 



Hind angles not limited within; legs liairy Schaumii, Lee. 



Mentum plate subacute behind and with a sliglit notch. 

 Thorax suddenly constricted at base; hind angles nodi- 

 form variolosus, Kliy 



Thorax not suddenly constricted at base; angles sub-acute 



and prominent squammulosus, Lee 



Mentum plate transversely oval, deeply notched behind. v, 

 Surface opaque. 

 Anterior angles with a notch on anterior margin only..canaliculatcs, Kbv. 

 Anterior angles limited within and behind by an incisure, nodi- 

 form castaneae, Knoch. 



Surface shining. 

 Anterior angles nodiform, without lateral incisure Harrisii, Kbv. 



The first three species have a short frontal carina joining the re- 

 flexed edge in front, while the first two haA^e the sides of the head also 

 carinate and a transverse occipital groove and the pygidium elevated 

 longitudinally. The two species just cited are very decidedly ambula- 

 torial from the form of their legs which are relatively longer than any 

 others of the genus. The anterior tibiae are slender, slightly arcuate 

 and the teeth of the outer edge small or obsolete. The tarsi are lon- 

 ger than the tibiae and the anterior pair with the peculiar formation 

 indicated in the table. The dorsum of the elytra is also perfectly flat 

 and bounded laterally by a slightly elevated border. 



C. depressus, n. sp. — Black feebly shining. Head sparsely punctured witli 

 short carina at middle of clypeus and a lateral carina extending from the occi- 

 put where it is higher, to the rcflexed clypeal margin ; occiput with transverse 

 ffroove. Thorax one-fourlh broader than long, broadest at anterior third, sides 

 strongly rounded in front gradually narrowed to base; anterior angles moder- 

 ately prominent, limited behind by a slight sulcus iu the lateral margin; hind 

 angles not prominent, limited within by a slight sulcus j)arallel with the mar- 

 gin; basal margin lobed at middle; disc coarsely punctured and with a slial- 

 low median sulcus deeper and broader behind. Elytra flat, disc limited by 



