122 ACADEMY OF NATURAL SCIENCES 



hair which conceals a whitish spot, sometimes wanting: feet, post- 

 pectus, and venter, deep black. 



Length about one-fourth of an inch. 



It inhabits the Atlantic States, and I have also observed it on 

 the Ohio. 



3. C. NiGRiPES. — Rufous; head immaculate; feet black; ely- 

 tra rufous at base, and with black and cinereous bands. 



Inhabits the TJnited States. 



Body pale rufous : head immaculate; eyes, antennae, palpi, and 

 tips of the mandibles, black : elytra with a rufous base occupying 

 more than one-third of the length ; a very narrow black band be- 

 fore the middle, a narrow whitish band on the middle, covered 

 with cinereous hair, and curving backward at the suture ; a di- 

 lated black band behind the middle ; tip black, covered with 

 cinereous hair, which conceals a whitish spot which is sometimes 

 wanting : feet black. 



Length less than one-fourth of an inch. 



This species is very similar to the preceding, and differs in 

 having a rufous postpectus and venter, and immaculate front. 

 It also resembles Clerus duhius Fab., but differs from it, if I am 

 not mistaken in that species, by being much smaller; and besides 

 other differences, by the central band of the elytra curving back- 

 ward, and not towards the head, as in duhius. [ 192 ] 



4. C. iiu.MERALis. — Black; humerus with a large rufous spot. 

 Inhabits the United States. 



Body black, hairy ; head greenish-black ; antennae pale, the 

 three terminal joints forming an oval mass : palpi pale : thorax 

 greenish-black, dilated each side before the middle into a very 

 obtuse tubercle : elytra violaceous black, with dilated confluent 

 punctures ; a large humeral rufous spot : anterior tibia either en- 

 tirely or only on the inner edge rufous. 



Length from more than three-twentieths to one fifth of an inch. 



From Missouri ; and is also an inhabitant of the Atlantic States. 



[Belongs to Ili/dnoccra. — Lec] 



SILPHA Fab. Latr. 

 1. S. CAUUATA. — Black; with short cinereous hair; elytra 

 sinuate at tip, three elevated lines and intermediate series of tu- 

 bercles. 



[Vol. III. 



