334 THE ENTOMOLOGIST. 
ground, and no producing cause being apparent? I should 
rather be inclined to suppose that they were deposited by the 
insects on the platform either just before or during the rain ; 
but why they were there deposited I cannot hazard a guess. 
—W. Slade; London and County Bank, Buckingham, 
June 10, 1871. 
Saturnia Carpini.—This year [ had a quantity of Carpini 
pup, most of which came out in April, yet I have about a 
dozen still in cocoon. JI have looked at them, and find they 
are alive. When are they likely to come out '—W. J. Skelton ; 
The Bounds, near Faversham, Kent, June 22, 1871. 
I have generally found that when Bombyces fail to emerge 
at the usual time, they emerge at the corresponding period of 
next year. 
Peecilocampa Populi.—The larva found by Mr. Garrow, 
feeding on birch, is that of Peecilocampa Populi. 
EpwarRD NEWMAN. 
Description of the Larva of the Beautiful Hooktip.—tt 
lies in a perfectly straight position, with the ventral surface 
closely appressed to the object on which it is resting, 
usually the twig or branch or trunk of a tree, or an old rail, 
or park palings: one condition of this object is indispensable, 
—it must be clad with the lichens which constitute the sole 
food of this species, and which it so closely resembles in 
colour and appearance that it requires the keenest, as well-as 
the most practised, sight to detect its presence; it does not 
fall readily, and is quite indifferent to the touch of a finger, 
but if forcibly removed it falls in a limp and flaccid manner, 
and makes no attempt to roll in a ring or adopt any other 
expedient for safety or concealment, perhaps because pos- 
sessed of the intuitive knowledge that its colour and appear- 
ance sufficiently conceal it from the prying eyes of birds and 
entomologists ; in crawling, its action is that of a half-looper, 
Catocala for instance, the back being alternately raised and 
depressed with a gently undulating motion. The head is 
rather narrower than the second, and decidedly narrower 
than the third, segment; its position when at rest is semi- 
prone; the face is flat, and the crown scarcely perceptibly 
notched. The body is of nearly uniform width throughout, 
