280 OOT-EOPTERA OF NORTH AMERICA. 



The front is bruatl, short, and perpendicular, tlie eyes coarsely 

 granulated, very deeply eniarginated ; the mandibles small, pyra- 

 midal, and entire, the genaj very short; the palpi are short, equal, 

 not dilated ; the mentum is narrowed and rounded in front, and 

 the lignla appears to be of a corneous consistence, with the 

 supports of the labial palpi less distant than usual and connate. 

 The antennae are polished, very sparsely punctured and pilose, 

 and have two obscurely defined sensitive spots near the extremity 

 of the'Sth and following joints; they are scarcely as long as the 

 body in the %, shorter and more slender in the 9. 



On the under surface of the prothorax is seen on each side a 

 large rcniform impression, which is opaque, coarsely punctured 

 and slightly hairy, and which according to Lacordaire is wanting 

 in some exotic species; the front coxal cavities are small, quad- 

 rate, not angulated externally, widely open behind ; the i)rostenium 

 is rather broad. The mesosternum is broad, flat, and truncate 

 behind; the ventral segments 1-4 diminish gradually in length, 

 the 5th is very short, and broadly subemarginate in % , narrower 

 and elongate in 9 . 



The genus Smodicum seems more allied to Asemum, than to 

 Atimia, with which it has been associated by Lacordaire.* The 

 eyes are coarsely granulated in Smodicum, and very finely in 

 Atimia; the front coxal cavities open in the former, and closed 

 in the latter. The one is an undifferentiated form of typical 

 Cerambycida;, the other an anomalous form leading to some of 

 the Lamiide groups. 



Tribe II.— CAI.l.II>Hi\I. 



A tribe containing species usually depressed, and rarely slender 

 in form ; the prothorax and elytra are never spinose. The eyes 

 are finely granulated, deeply emarginate, but do not embrace the 

 base of the antenme; the head rather small, with the front short, 

 perpendicular, or nearly so; mandibles short, stout, acute, gense 

 moderately long; paJpi usually very unequal, dilated. Antennae 

 with the outer joints sericeous, or punctured, without distinct 

 poriferous spaces; the 2d joint not as large as in Asemini, but 

 longer than usual. Front coxal cavities transverse, very strongly 

 angulated, with large trochantin, open behind; prosternura vari- 



* Gen. Col. ix. 143. 



