152 Mr. S. S. Saunders's Descriptions of some 



In this respect it approaches the Callirhipis hicolor and scapularis of 

 M. de Laporte's monograph, in the second number of the Annales 

 de la Societe Entomologiqne de France for the year 1834. In the 

 former of these two species the elytra are entirely black, and the 

 head and thorax " aurantiaca ;" while in the latter the thorax is auran- 

 tiacous, with a central black spot, and the elytra are black, with a 

 large basal aurantiacous spot dilated at the suture. These two in- 

 sects (which M. de Laporte considers may possibly be varieties of 

 the same species) are however only 7^ lines long, while mine is 10 

 lines, calculating 12 to the inch ; but a remarkable circumstance, 

 showing the concurrent influence of organization and colouring, here 

 presents itself to notice, M. de Laporte having observed in both his 

 insects " un caractfere fort remarquable, qui consiste en deux pe- 

 tites pointes que ces insectes ont sur le bord anterieur du dessous 

 du corselet," and respecting which he adds, " ce caractere pourrait 

 bien etre sexuel chez ces insectes," although it is not to be noticed 

 in any of the uniformly coloured species. I had before observed in 

 my insect a similar pair of teeth, or small projecting points, at the 

 anterior margin of the underside of the thorax ; but as the head of 

 my specimen appeared a Uttle injured beneath, it seemed possible 

 that these points might be the result of accident : but on perceiving 

 that M. de Laporte had noticed the occurrence of a similar character 

 in the two insects before alluded to, I reexamined my insect, and 

 finding that the character in question occurs in the exact position 

 indicated by M. de Laporte, that it is perfectly symmetrical and 

 uniform on each side, and considering moreover that my insect 

 combines many other distinctive characters common to the two in- 

 sects described by him as before alluded to, although at variance 

 with those of the other species of Callirhipis, I have returned to the 

 opinion which I had originally entertained, that these points were 

 characteristic of peciiliar organization. The three species further 

 differ in general form from others of the genus, being more elongate, 

 and having the head less deflexed, and the thorax less convex ; and 

 although the structure of the tarsi, with the claws and tubercular 

 pulvillus, is similar to that of the typical Callirhipis, the general 

 character of the three insects is so dissimilar from the rest of the 

 genus as, in my opinion, to call for their separation under a sub- 

 generic name : but considering the recent appearance of M. de La- 

 porte's monograph, and the attention which he has bestowed upon 

 the whole group, I prefer leaving the subject altogether at his dis- 

 posal. 



The figure given by M. Guerin of the maxillae of Callirhipis De- 

 jeanii, in the ' Iconographie' (Insectes, pi. 13. fig. 6,), represents them 



