COLLECTION OF ARTICULATED ANIMALS. 



Senegal. Other genera of the same family pre- 

 sent various combinations of form and colour. 

 The trogosita carabo'ides, Oliv. (n°5), or tenebrio 

 mauritanicus , Lin., is very noxious; its larva, 

 which is called cadelle in Provence, feeds upon 

 corn, and the insect in its perfect state is often 

 found in flour, bread, etc. 



The second division, that of the cycloidece , so 

 named from the rounded form of their body, 

 comprehends the genera cassida* hispa, and 

 chrysomela, Lin. This last has been divided to 

 form the genera galeruca and crioceris. They 

 are all small round insects, which feed only on 

 the tender parts of plants ; they, are not the less 

 distructive on this account, as they are equally 

 voracious in their larva state, and assemble in 

 great numbers on the same plant. It is thus that 

 the galeruca of the elm (chrysomela calmarien- 

 sis, Lin.,) sometimes strips the tree almost en- 

 tirely of its leaves. The insects of the genus al- 

 tica, Geoff., which devour the plants in our 

 kitchen gardens, and which are called garden 

 fleas, are here united to the galeruca, but they 

 are placed at the end of the genus. Several co- 

 le op tera belong to this division, having longer 

 bodies, and their wing-shells frequently spotted, 

 compose the genus crioceris. Such of their larvae 

 as are known to us conceal themselves under a 



