Dr. T. A. Chapman's Life History of Plebeius. 483 



The larva is of much the usual Lycaenid form, but I 

 was much struck by the appearance of the larva when viewed 

 dorsally. In this aspect it seemed quite fiat and drawn 

 out, and very slug-like ; this effect is very obvious in Mr. 

 Knight's fig. 4, though fig. 5 shows that it really has a very 

 ordinary thickness. The effect is probably the result of 

 the coloration ; this is very bright and distinct, but when 

 the larva is on the plant and feeding by burrowing into it, 

 it conceals it most effectively. I cannot say that the 

 appearance of flatness is an element in producing this 

 effect, as it is most conspicuous when the larva is brought 

 out into the open and so into unnatural conditions. 



Apart from the colouring, it may be noted that the 

 larva has no very long hairs, the longest, very moderate, 

 being along the lateral flange. 



The pupa is of very delicate structure so far as a not 

 very healthy specimen showed. Several pupae were 

 obtained, but inability to supply the larvae with proper 

 food and moving about with them resulted in no imago 

 emerging. 



This imperfect account of the larva seems worth present- 

 ing, as I am not aware of any figure or description of the 

 larva having been so far published. 



Explanation of Plates. 



PLATE LXXXV. 



Larvae of P. zephyrus, var. lycidas. 



Figs. 1 , 2 and 3. Larvae in penultimate instar. 



4, 5. „ „ last instar. Much enlarged. 



PLATE LXXXVI. 

 Fig. L Larvae of P. lycidas on leaves of Astragalus exscapus. 



2. Larva of P. lycidas, nat. size. Stereoscopic. 



3. Pupae of P. lycidas, X 2. Stereoscopic. 



Photos, by Mr. H. Main. 



PLATE LXXXVIL 



4. Skin of larva of P. lycidas, X 9. 



TRANS. ENT. SOC. LOND. 1914. — PARTS III, IV. (FEB.) 1 1 



