uimsual monstrous Insects. 223 



the larva, is represented In PI. VII. fig. 6. It was In the 

 collection of the late J. F. Stephens, and is now pre- 

 served in the British Museum. 



BoMBYX MORI. — A small specimen of this species was 

 exhibited by jMr. F. Bond at the Entomological Society 

 of London, February 20, 1871, retaining the larval head. 

 It has been presented to me by Mr. Bond, and Is now in 

 the Hopeian Entomological Museum at Oxford. It is 

 represented, enlarged in PI. VII. fig. 5. It has the 

 wings crippled, but the head is entirely enveloped in the 

 head of the larva as represented in fig. 5 a, front view, 

 fig. ob seen sideways, showing the minute eyes of the 

 larva. 



Vanessa atalanta. — PL VII. fig. 4 represents 

 the front of the body and head of a specimen of the Eed 

 Admiral butterfly which still retained the fractured cephalo- 

 theca of the larva covered Avith its minute conical tubercles, 

 and which are represented as seen sideways In fig. 4«. 

 The specimen was bred by a metropolitan collector, and 

 was very perfect. It was lent to me for delineation by 

 Mr. F. Bond, by whom it was exhibited at the Entomo- 

 logical Society of London on the Gtli February, 1871. 

 It was a male, as shown by the feathery anterior legs in 

 fig. 4a. The hind ]iart of the larval head was split, and 

 partly lost. On looking obliquely through this slit at the 

 point *, the light is seen through it, proving that the 

 inclosed head of the animal did not occuj^y the anterior 

 part of the skull of the caterpillar beyond the *. The 

 inclosed portion which has oozed through the slit in the 

 larval skull forms a convex hard mass of a blackish 

 coloiu', tessellated with small luteous dots and marks, and 

 Avlilch appears to me to be the skvill of the true pupa. 

 On the underside there are no traces visible of the antennai 

 cases {cei^atothecoi), but a shapeless blackish mass is inter- 

 posed between the skull of the larva and the front of the 

 chest and fore-leg:s of the imaa-o. 



In an elaborate memoir, published by Dr. Hermann A. 

 Ilagen in the 2nd volume of the ' INIemoIrs of the Museum 

 of Comparative Zoology ' at Harvard College, Cambridge, 

 Mass., on some insect deformities, the following instances 



