10 
ON SOME INSECT DEFORMITIES. 
caterpillar through the small opening of the mentum. As the skin of 
the chrysalis must have existed, I did not deem it necessary to dissect 
the specimen, especially as Wesmael's dissection of Nymphalis Po/>n//' 
has sufficiently explained the fact. 
The head of the caterpillar resembles very much the figure in Merian 
Surinam. Lepid., pi. 23. The color is leather-yellow, with two brown 
bands on each side. There are two yellow finger-shaped horns on the 
top, and three similar ones on each side; they become successively 
smaller. The last one is very short. 
The specimen has doubtless lived long enough to get the colors per- 
fectly developed, and to break down the mentum with the spiral tongue. 
It differs from Wesmael's butterfly in having retained the dorsal part 
of the prothorax, though somewhat distant to allow a view of the tho- 
rax of the imago. In Wesmael's butterfly the palpi were not covered. 
I have quoted erroneously, in the Proceed. Bost. Soc. N. H., 1868, Vol. 
XII, p. 163, the Brazilian specimen as Morpho Ilioneus, and Mueller's 
specimen as Dicranura vinula. 
Vanessa Antiopa. 
Professor Zeller has described in the Isis, 1839, p. 259, a specimen 
with the head of the caterpillar, raised by himself together with about 
150 others. The specimen differs from them only by the presence of 
the head of the caterpillar, which is in a vertical position, just as in the 
caterpillar. The mouth is closed. Having cut a part of the left side, 
the Professor could observe a hollow space between the head of the 
caterpillar and the remaining parts of the insect. Behind the head 
and not connected with it the two anterior plates of the chrysalis are 
retained. The butterflv made its transformation in the absence of the 
if 
Professor, and was pinned at the same time with all the others. It was 
impossible to find its chrysalis skin. 
Vanessa Atalanta. 
Mr. Bond exhibited in the Entomological Society in London, Febru- 
ary 6, 1871, a specimen bred by a metropolitan collector, which still 
bore the larval head. The specimen, as I am informed by Mr. M'Lach- 
lan, was very perfect. 
Pieris Rapse. 
Among a number of chrysalids which had not transformed, I found in 
the fall of 1871, in Cambridge, one of an extraordinary appearance. 
In casting off the skin of the caterpillar only the thoracic part of the 
