■an the pupae are matured. The head is bent against the breast 
l the legs folded against the body beneath, the posterior pair 
Qg applied against the sides of the abdomen, and the thighs of 
two anterior pairs projecting at right angles. The wing covers 
wrapped around the posterior pair of legs, and the antenna? 
brace the knees of the two anterior pairs. 
■he front of the head is set with a few long spines with inflated 
es, and three transverse rows of similar spines appear upon the 
rax, one near the anterior border, another near the posterior, 
l the third intermediate. Six similar hairs occur upon the scutel- 
i, and a row of about six or eight boiders each of the ab- 
iinai segments above. The three last segments are variously 
jiied with spines, differing in shape and direction according to the 
us, and the knees of the last pair of legs are furnished with 
i it hooks and long slender hairs with inflated bases. The sheaths 
;he antennae are beset externally with conical tubercles. 
Idults .—The adult beetles all belong to the great family Chryso- 
f idae, which contains many of the most destructive enemies of 
iculture, and to the group Eumolpini. As defined by Leconte 
[ Horn m their recent revision of the “Classification of the Coleop- 
t of North America,” this group is thus distinguished: “Body 
mg, convex, rarely rounded or oval, usually metallic, sometimes 
faceous or spotted. Head moderate, deflexed, front wide eyes 
re or less emarginate; antennae filiform, or slightly thicker ex- 
lally, usually long; widely separated at the base. Prothorax 
erally with distinct lateral margin, which is, however, rarely 
ced. Pygidium covered by the elytra, which are rounded at tip. 
• j cox ? se P ar ated by the prosternum, globose, cavities closed 
md - . ^ e gs moderate, the front ones sometimes elongated; tarsi 
ad, third joint deeply bilobed, claws appendiculate or bifid in our 
era. 
{ 
DIFFERENTIAL CHARACTERS. 
s may be inferred from the fact that these root-worms all belong 
l’he same tribe of their family, the characters which distinguish 
ii m their immature stages are few and trivial. The adult 
des belonging to separate genera, may be discriminated without 
culty; but the larvae of Scelodonta and Paria especially, are 
ost indistinguishable. 
I y an attentive examination, the larvae of Colaspis may be easily 
| irated from the others, by the decided prominence of the two 
s oi tubercles at the ends of the ventral ridges, (Plate IX, Fig. 4, E, a, 
7> Ly the strong spine-like hairs which these tubercles bear, 
also by the peculiar character of the posterior segments beneath 
+ if ^ and 13). In Scelodonta and Paria the eleventh 
twelfth segments are similar to the preceding in structure, except 
i they are decidedly shorter, and the tubercles upon their dorsal 
les are much more prominent. Each makes, however, a com- 
i e ring, encircling the abdomen, and the rudimentary thirteenth 
! uent is scarcely more than a soft papilla containing the vent. 
lit in the larva of Colaspis, the twelfth ventral segment is deeply 
| widely emarginate posteriorly,, divided, in fact, into two triangu- 
—11 
