814 General Notes. [September, 
is that of a convex mass of white silk spun on to the under side of 
the leaf, resembling, in fact, a cocoon, or more probably the 
convex white egg-case spun by a spider. But such an appearance 
becomes very much the reverse of protective as soon as the larva 
moves, especially upon a dark background, and the darkening of 
the larval body alone would be useless, because the hairs form 
its most conspicuous feature—Z. B. Poulton, Trans. Ent. Soc., 
London, 1886. 
An EVERSIBLE “ GLAND ” “In THE LARVA oF ỌORGYIA. — 
“I do not know whether this structure has been previously 
noticed ; it is not mentioned in the well-known text-books. The 
single gland to which I refer is situated in the median dorsal line 
of the seventh abdominal segment, and it is everted when the 
larva rolls up on being disturbed. The larval surface close to the 
lips of the aperture seems to be extremely sensitive to tactile im- 
pressions.” On reading the foregoing note by Mr. E. B. Poulton 
in the Transactions of the Entomological Society ot London (1886, 
159), in reference to the European O. pudibunda, I at once turned 
to several larva: of O. deucostigma, and found, what I had not be- 
fore observed, that the two coral-red tubercles on the back of the 
tubercles are only partly exserted, and the edges are usually in 
motion, slightly everting and retracting.—A. S. Packard. 
Enromorocicat News.—In the Transactions of the Entomolo- 
gical Society of London for 1886, part 11. Mr. E. B. Poulton aes 
lishes farther notes on lepidopterous larvæ and pup, induna 
an account of the loss of weight in the freshly-formed pupa. Th P 
loss is stated to be “ immense,” but the experiments are not oe 
tended to indicate the normal loss of weight in pupæ throughou 
groups,” and that Mr. Allen’s theory of the origin of srate 
coloration is not sustained by an examination of even mod aid 
t. “We find,” says Mr. Slater, ‘abundance of flower ae 
fruit-haunting species dull and sombre in aspect; an os tly 
sundance of Carnivora and refuse-devourers richly and bril -n 
clad ; we find groups of species closely simular in color yet q 
