COLEOPTERA. 129 
C. equestris, Fab.; Oliv., Col., V,97,i,3. Closely allied to 
the following species, but rather larger, and only found in 
aquatic localities on Mint. It is green above and black beneath; 
margin of the abdomen and the feet yellowish. 
C. viridis, L,; Oliv., Col., II, 29. Length one line and a half ; 
it only differs from the equestris in the puncta of the elytra, 
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 feeces, 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 feces are disposed in numerous and articulated 
threads, which resemble a sort of wig. The 
C. nobilis, L.; Oliv., Ib., I, 24. Yellowish grey, with a gol- 
den-blue streak near the suture, which disappears with the death 
of the Insect *. 
In the second tribe, or the CurysoMELIN®, the antennz are remote, 
and inserted before the eyes, or near their internal extremity. These 
Insects never leap. With those of the following tribe, and some be- 
longing to the preceding family, they compose the genus Chrysomela 
of Linnzeus, which we have restricted by the admission of others, on 
account of its great extent. 
Those species in which we find the above-mentioned characters, 
form, as in the earlier entomological works of Fabricius, two genera. 
The first, or 
CRYPTOCEPHALUS, 
Is composed of Chrysomelinz, in which the head is plunged verti- 
cally into an arched or hood-like thorax, in sucha 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 trun- 
cated at that extremity and destitute of a head. The antenn 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. 
Sometimes the antennz are short, pectinated, or serrated from the 
fourth or fifth joint. 
Here the exterior margin of the elytra is straight, or is but slightly 
emarginated ; the posterior angles of the thorax are rounded and not 
arched, and the anterior ones are not bent underneath. The boby is 
always in the form of a short cylinder ; the antennz are always free, 
and the eyes entire or but slightly emarginated. The males fre- 
RE na 0 TY EE SN I CURE lee en PLS 
* For the other, species, see, Oliv., Ib.; Fab., Syst. Eleut.; Schonh., Synon. 
Insect., II, p. 134, and 209, 
