ON SOME INSECT DEFORMITIES. 



In arranging the Lepidoptera of the collection, I found, among the 

 insects brought home from Brazil by Professor L. Agassiz, a speci- 

 men of Morpho Eurybchus with the head of the caterpillar. The 

 excellent condition of the large specimen induced me to compare all 

 published observations of a similar deformity. These are few, and scat- 

 tered in transactions not easily accessible. Therefore I concluded to 

 reprint the full text for the two oldest known, and to give copies of the 

 figures, together with those of M. Eurylochus. In the hope of having 

 information about other similar cases, I published a provisional paper in 

 the Stettin Eut. Zeit. (1872), p. 388, and I am indebted to Professor Zeller 

 of Stettin, Professor Westwood of Oxford, Mr. M'Lachlan of London, 

 and Dr. J. L. Leconte of Philadelphia, for additional information. 



The rare and less known paper of Mr. C. Majoli, on a precocious 

 development of Bombyx Mori, and the notice of two deformities of 

 Coleoptera, seemed to me not out of place in this paper. 



PERFECT INSECTS WITH THE LARVAL HEAD. 

 Phalsena heteroclita. 



The well-known Danish naturalist, Professor 0. F. Mueller, has de- 

 scribed (1764) in his Fauna Fridrichsdalina, p. 47, No. 413, a new 

 species of Noctua, found by himself at Fridrichsdal, a locality a few 

 miles distant from Kopenhagen. 



Phal. N. heteroclita subcristata, capite erucfe, antennis nullis : alis 

 albis, lineis transversim undatis punctatisque marginalibus nigris. In 

 Epilobio. 



This description is verbatim, repeated by himself in his Prodromus 

 Faunae Danicae (1776), p. 124, No. 1428. 



In the Mem. de Mathem. et de Phys. presented a. l'Acad. R. des 

 Sciences a Paris (1774), Vol. VI, pp. 508-511, pi. 1, Professor 0. F. 

 Mueller has given a detailed account of this most remarkable speci- 



