COLEOPTERA. 553 



which form regular lines near the suture; the thighs are most 

 commonly black. 



The larva lives on Thistles, and most commonly on the Arti- 

 choke. Its body is extremely flat, and the whole margin is 

 covered with spines; it covers itself with its faeces, which it 

 keeps suspended in a mass on a kind of fork situated near the 

 orifice of the anus. The nymph is also much flattened, and has 

 delicate and serrated appendages along its sides; its thorax is 

 broad, rounded anteriorly and conceals the head. 



In the larva of a species found in St Domingo C. ampulla, 

 Oliv. the fseces are disposed in numerous and articulated 

 threads, which resemble a sort of wig. The 



C.nobilis, L.; Oliv., lb., II, 24. Yellowish grey, with a gol- 

 den-blue streak near the suture, which disappears with the death 

 of the Insect(l). 



In the second tribe, or the Chrysomelin^e, the antennae 

 are remote, and inserted before the eyes, or near their inter- 

 nal extremity. These Insects never leap. With those of 

 the following tribe, and some belonging to the preceding 

 family, they compose the genus Chrysomela of Linnseus, 

 which we have restricted by the admission of others, on ac- 

 count of its great extent. 



Those species in which we find the above mentioned cha- 

 racters, form, as in the earlier entomological works of Fabri- 

 cius, two genera. 



The first, or 



Cryptocephalus, 



Is composed of Chrysomelinae, in which the head is plunged verti- 

 cally into an arched or hood-like thorax, in such a manner that the 

 body, most commonly in the form of a short cylinder, or almost 

 ovoid and narrowed anteriorly, when viewed from above, appears 

 as if truncated at that extremity and destitute of a head. The an- 

 tennae of some are more or less serrated or pectinated; those of 

 others are long and filiform. The last joint of the palpi is always 

 ovoid. 



(1) For the other species, see Oliv., lb.; Fab., Syst. Eleut. ; Schcenh., Synon. 

 Insect., II, p. 134, and 2U9. 

 Vol. III. 3 U 



