CERAMBYCIDAE. 295 



pyramidal, and entire, the genae very short ; the palpi are short, 

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

 front, and the ligula appears to be of a corneous consistence, with 

 the supports of the labial palpi less distant than usual and con- 

 nate. The antennae are polished, very sparsely punctured and 

 pilose, and have two obscurely denned sensitive spots near the 

 extremity of the 5th 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 

 lafge reniform 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 prosternum 

 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 

 Cerambycidae, the other an anomalous form leading to some of 

 the Lamiide groups. 



Tribe II. CAIAIDIEVI. 



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 antennae ; the head rather small, with the front short, 

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

 moderately long ; palpi usually very unequal, dilated. Antennas 

 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 ; prosternum vari- 

 able ; middle coxal cavities open externally ; mesosternum some- 



* Gen. Col. ix, 143. 

 20 May, 1873. 



