CEllAMBYCIDAE. 275 



alike in both sexes, very hairy, and armed on the side with a 

 single acute tooth. Tiie elytra are j)unctured and finely ribbed. 

 The poriferous system of the antennie of both sexes, which are 

 slender, nearl}^ filiform, and slightly compressed, commences on 

 the 3d joint, on the under surface, and gradually increases, cover- 

 ing the whole of the joints beyond the (Jth, and appears lik(; a 

 fine dense punctuation. The head is small, the eyes large, 

 coarsely granulated. The legs are slender, finely punctured, and 

 hairy. The side pieces of the metathorax are triangular, broad 

 in front, })ointed behind. The abdomen is gi'adually narrowed 

 behind, with the 5th ventral segment truncate; the intercoxal 

 process is acute. 



Tribe VI.— POECILOSO]MI]\fI. 



This tribe contains all Prionidaa with finely granulated eyes, 

 and is represented in our fauna by single species of two genera, 

 belonging to the group Solenopterae. In the specimens before 

 us, which are females, the poriferous system of the antenna; con- 

 sists of a few irregular scar-like depressions on the outer joints. 



The head is small, nmcli narrower than the prothorax, which 

 is trapezoidal, smooth, and obtusely toothed near the base in 

 Sphenostethus; very roughly punctured and acutely toothed be- 

 hind the middle in Elateropsis. In both genera the prosternum 

 is deeply emarginate behind for the reception of the mesosternum, 

 which is also emarginate behind. 



Sphenoatethus Taslei{sevrl\)cnnh Hald.) occurs in the Atlantic 

 States. Elateropsifi fuliginoHus occurs only in the southern 

 point of Florida, whither it has extended from Cuba. 



Sub-Family II.— CERAMBYCIN.E. 



The only characters we can give to define this sub-family are 

 those already set forth in Dr. LeConte's first paper on this series 

 of Ooleoptera,* viz. : Prothorax not margined, front tibia; jiot 

 obli(juely sulcate, labrum separate from the front, palpi never 

 acute at tip; to which may be added, antennas always pubescent, 

 never glabrous with corrugated and extensive sensitive surfaces 

 as in Prionida;. 



* An att(;mpt to classify the Loiigicorn (Jolooptcra of the part of America 

 north of Mexii-o. Journ. Acad. Nat. Sci. Pliila. 2d, i. 311. 



