unusual monstrous Insects. 225 



of the imago ; and underneath the head of the caterpiUar, 

 and just above the skin of the chrysahs was the left 

 antennas coiled up, but without an apical knob, — it was 

 covered by a very fine membrane, to a great extent 

 diaphanous. 



MoEPHO EURYLOCHUS. — I am indebted to Dr. H. A. 

 Hagen for the very beautiful drawing of a specimen of 

 this butterfly (reduced to half its natural size, copied in 

 PI. VII. fig. 3), of which a fall-sized figvu-e and descrip- 

 tion were published by him in his article in the Harvard 

 College Memoirs above referred to. 



In this specimen the cornuted head of the larva is per- 

 fectly preserved in shape and colour : beneath the head 

 the mentum is broken off near the prothorax, its lateral 

 sutures are separated and the mentum hangs down as a 

 kind of trap-door, being united with the head only by a 

 small anterior lobe. The opening is large enough to 

 show that the head of the larva is empty inside. The 

 skin between the head and prothorax is still preserved in 

 the shape of a contracted ring, which is open only for 

 a small space beneath where the mentum is separated. 

 The large dorsal plate of the prothorax is present and 

 covers loosely the thorax of the imago, on the left side 

 the external third is wanting. Dr. Hagen was not able 

 to state whether any part of the skin of the chrysalis, 

 either beneath the dorsal plate of the prothorax on the 

 middle and on the right or on the entirely fi-ee left side of 

 the thorax is present. 



Vanessa antiopa. — Professor Zeller has described in 

 the Isis, 1839, p. 259, a specimen of this butterfly retain- 

 ing the head of the caterpillar in the usual vertical posi- 

 tion. Having cut off" a part of the left side a hollow space 

 betAveen the head of the caterpillar and the remaining 

 parts of the insect was noticed ; behind the head, and 

 not connected with it, the two anterior plates of the 

 chrysalis are retained. 



PiERis rapyE. — A chrysalis of this species is described 

 by Dr. Hagen, p. 10, in which, in casting off' the skin of 

 the caterpillar, only the thoracic part of the chrysalis was 

 developed, the head of the caterpillar was still present, 

 but its sutures were separated. The dorsal split of the 

 skin reaches to the first segment of the abdomen, and the 



