COLEOPTETIA. 100 



But a single species is yet known — P. Dejeanii- — and that is peculiar 

 to Brazil. 



In the others, the antcnnj^e, at most, are spinous, or slightly ser- 

 rated. 



Several, which are very remarkable for their colours, and the 

 agreeable odour they diffuse, present an anomaly with respect to the 

 relative proportions of their palpi : the maxillary palpi are smaller 

 than the labials, and even shorter than the terminal lobe of the max- 

 illiu which frequently projects. Their body is depressed, and the an- 

 terior part of the head narrowed and pointed ; the posterior tibiae are 

 often strongly compressed. 



They compose the subgenus 



Caluchroma, Lat, — Cerambyx, Fab., Dej. 



Among the species with simple, setaceous antennae, and a dilated 

 thorax, s^jinous and tuberculated on the middle of its side, and in 

 which the posterior thighs are elongated, and their tibiae strongly 

 compressed : there is one in France, found on the Willow, that diffuses 

 a strong odour of roses. 



C. moschatus ; Cerambyx moschatus, L. ; Oliv., Col. IV, 67, 

 xvii, 7- It is about an inch long, entirely green, or of a deep 

 blue, and somewhat gilded in certain individuals. 



C. ambrosiacus, Stev., Charpent. Very similar to the pre- 

 ceding, but the thorax is entirely, or only on the sides, of a 

 blood-red. It is found in the south of Europe, in the Cri- 

 mea, &c. 



South America and the tropical countries of the eastern con- 

 tinent produce several others*. 

 Other Longicornes of the same division, but in which the maxil- 

 lary palpi, as usual, are at least as long as the labials, and extend 

 lieyond the extremity of the maxillae, are distinguished from the 

 following ones by their antennae, which distinctly present twelve 

 joints instead of eleven, at least in the males ; they are always long 

 and setaceous, and freqviently spinous or bearded. The thorax is 

 dentated or spinous on the sides. AVe will unite them in the sub- 

 genus 



* The Ceniiiiby.r virens, albitarsus, tiiten^, niicans, ' ater, festivus, vittatus, sericeus, 

 elegans, suiuraUs, lafipes, regius, albicornis, &c., Fab. 



Certain African species, such as the Cerambyx longicornis, flavicornis, and claviger, 

 of Schoenherr, which, though very analogous at a first glance to the preceding, ap- 

 pear to form a separate subgenus by their compressed antennae dilated near the end; 

 but the mouth of the Cerambyx sex-punctatus of this same naturalist — Saperda 

 ^-punctata, Fab. — which, from its analogy to the Cerambyx clavicornis — Sap. clavicor- 

 nis, Fab. — of the same, appears to be congeneric, in the proportions of its palpi, 

 resembles a Cerambyx, properly so called. 



The Saperda hirsuticomis, Fab. — Kirby, Lin. Trans., XII, p. 442 — is a Calli- 

 chroma by its mouth, it is true, but differs from it in the antenuK eind the form of 

 the body. 



