PIERID.E 17 



In the summer of 1890 (from July 3 rd to 5 th ), 

 I collected in the mountains altogether sixteen cater- 

 pillars, nearly all full-fed. They were all found on a 

 tall alpine crucifer, probably Sisymbrium polyeera- 

 tium, sometimes as many as five on one plant. 



The imagines came out in the following spring, 

 (from May 3 rd onwards). 



PUPA.. Can vary in colour from light drab or 

 greyish buff bordered at the sides with a deeper 

 shade, and with dark dorsal line, to light green. 

 These chrysalids are more arched than those of the 

 preceding species. Out of eight pupae of the normal 

 colour only one was green. 



The imago (a male) which emerged from this latter, 

 differed in no way from the others. 



OBSERVATION. Imagines are variable in size. One 

 specimen which I possess, measures only 1" 3'" from 

 the tip to tip of each fore-wing. 



The larvae of Euphenoides are easily reared with 

 care from the eggs, on the air-tight principle of the 

 corked bottle. 



The food-plant, which remains fresh for a conside- 

 rable time, must not be allowed to get mouldy, and 

 the bottle must never be exposed to the direct rays of 

 the sun. 



Care must be taken not to allow moisture to collect 

 on the sides of this too readily heat conducting 

 larvarium. 



I may add, that I have successfully experimented 

 with the larvae of R. Cleopatra and C. Pamphilus, 

 from the ova. 



