CUECULIOS THAT ATTACK WALNUT AXD HICKORY. 15 
The larva (PI. VII. D. E, and F) is yellowish white with brown 
head and black jaws and is covered with scattering, short bristles, 
those on the dorsal surface of the last three segments being longer 
than those elsewhere. The length of the larva averages 10 mm. and 
the thickness at the middle 2 mm. Except for its slightly smaller 
size it is practically indistinguishable from those of other species 
described herein. 
The favorite feeding place of the larva is in the heart of the bulb- 
like swelling at the base of the leaf petiole. (PL VII, D and E '.) 
It also mines in the pith of the shoots and leaf stems, making bur- 
rows an inch or two long. The season of activity is in the spring and 
early summer when the new growth is tender. 
PUPA. 
The delicate, white pupa (PI. VIII, B) is characteristic of the 
group and occupies an earthen cell from one-half inch to 2 inches 
below the surface of the ground. The pupa stage covers a period 
of not more than two or three weeks. 
ADULT. 
The beetle (PL VII. A) is considerably smaller than any other of 
the curculios discussed herein, an average specimen measuring 5 
mm. in length and 2 mm. in thickness. The color is dull grayish 
brown with a more or less indistinct, broad band of yellowish pubes- 
cence behind the middle of the elytra and a narrow line of the same 
color on each side of the thorax. The snout is stout and curved and 
as long as the head and thorax combined. 
The newly transformed beetles issue from the ground in mid- 
summer and probably spend thereafter a period of comparative in- 
activity on hickory trees before hibernating in the autumn. With 
the bursting of hickory buds the following spring they reappear and 
begin ovipositing as soon as the shoots are a few inches long. They 
feed rather freely at this time, eating out small pits which extend 
through the bark of the young growth. Beetles were found fre- 
quently hiding between the folds of the expanding buds of hickory. 
In ovipositing the female spends 30 to 40 minutes in preparing a 
place for the egg, and while thus engaged is often guarded closely 
by a male. 
NATURAL ENEMIES. 
The larvae while feeding and developing became rather heavily 
parasitized, at least 50 per cent of them dying from this cause during 
the two seasons they were kept under observation. Three species of 
