528 INSECTA. 



the third joint of the antennae, and the three following ones are fur- 

 nished with fasciculi of hairs(l). 



There, the antennae are shorter than the body, and pectinated or 

 serrated. The thorax is transversal and dentated laterally. The 

 elytra are widened posteriorly. 



Ctenodes, Oliv. Kliig(2). 



Now the thorax, either almost square or cylindrical, or orbicular 

 or nearly globular, is much shorter than the elytra, at least in those 

 in which it is extended in width, and the praesternum presents neither 

 carina nor pointed prolongation at its posterior extremity. The 

 scutellum is always small, and the legs are approximated at base. 



A single subgenus, 



Phcenicocerus, Lat. 



Is removed from the following ones by the form of the antennse of 

 the male, the joints of which, commencing with the third, are pro- 

 longed into long and narrow laminae forming a large fascis or fan. 

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

 to Brazil. 



In the others, the antennae, 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- 

 illae which frequently projects. Their body is depressed, and the 

 anterior part of the head narrowed and pointed; the posterior tibiae 

 are often strongly compressed. 



They compose the subgenus 



Callichroma, Lat.- Cerambyx, Fab. Dej. 



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

 thorax, spinous and tuberculated on the middle of its sides, 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. 



(1) Cerambyx bar bicornis, Oliv.; Trachyderes hirticornis, Schoenh.; Cerambyx 

 hirticornis, Kirby. 



(2) Oliv., Col., VI, 59, bis, I, 1; Schoenh., Synon. Insect., I, 3, p. 346; The 

 Ctenodes zonata, minuta, geniculata, Kliig, Entom. Bras., XLII, 1, 2, 3. As the 

 only knowledge I have of tbese Insects is through drawings, I merely place them 

 here from analogy. 



