PIERIS NAPI. 159 



examples of the buff variety, but this variety has the 

 largest and darkest development of these purple-brown 

 spots, and has the wing nervures marked out also. 

 (J. H., 6, 11, 85.) 



Anthocharis cardamines. 

 Plate III, fig. 2. 



In 1864, July 5th, I had a larva sent to me on 

 Hesperis matronalis, the imago from which appeared 

 8th May, 1865. On 15th July, 1885, Mr. W. H. 

 Harwood kindly sent me two larvse just come to full 

 growth, and gave me the information that he is 

 accustomed to find the larva principally on Sinapis 

 arvensis, which he considers its chief food, also on 

 Gardamine pratensis, Sisymbrium officinale, Alliaria 

 officinalis, and seeds of garden rocket.* My two larvae 

 became pupse on July 18th and 19th, and I had the 

 pleasure of seeing the change in each case ; the time 

 from the opening of the slit in the back of the larva 

 skin to the clearance of the anal tip was about seven 

 minutes. 



The full-grown larva is about 27 mm. in length, 

 rather slight in figure, nearly cylindrical but with a 

 subspiracular ridge, stoutest at the sixth segment, 

 thence tapering each way, the head rounded, about as 

 wide as the second segment, which is narrower than 

 the third, anal flap ending bluntly; the larva looks 

 wrinkled, each segment having six subdividing rings, 

 with apparently some complication at the folds ; the 

 skin is thickly set with fine raised dots of two sizes, 

 bearing fine pubescence ; the colour is a uniform dull 

 glaucous green on the back, passing through grey 

 green into the pure white spiracular stripe ; the belly is 

 of a more tender green than the back ; the dots on the 

 back are black placed on greyish little warts ; on the 



* I have found the larva on Turritis glabra and on the flower-stems 

 of horse-radish. — H. T. S. 



