EUCHLOE. 189 



formation received from the late Mr. J. Watson, that it had a 

 different plumule. But after Mr. Watson's death, his intimate 

 friend, Mr. B. B. Labrey, told me that he believed that Mr. 

 Watson had wrongly identified the Butterfly which he called 

 E. tiirniis, and I therefore withdrew the insect as a species 

 from later editions of my work. Within the last year or two, 

 however, the question has been revived, and is still sub judice. 



EUCHLOE HESPERIDIS. 



Euchloe hesperidis, Newnham, Ent. Record, v. pp. 97, 219 

 (1894); cf. io/n. cit. pp. 146, 172. 



Mr. Barrett, writing of E. cardaniines, says (Lepid. of Brit. 

 Isl. i. p. 29): "There is also a recurrent small variety, a quarter 

 of an inch less in expanse in both sexes ; and in Surrey this 

 variety occurred year after year, a day or two earlier in the 

 spring than the ordinary form, with great regularity. It is not 

 certain, however, that this is the rule." 



Mr. Newnham has lately proposed the name E, hesperidis for 

 this small form, considering it as a distinct species ; and there 

 has been some correspondence respecting this and other forms 

 allied to E. cardaniijies^ in the Journal quoted above. I abstract 

 Mr. Newnham's observations on the subject. 



"^. hesperidis varies in expanse from 1-^-^ inches to if"^ 

 inches, whereas E, ca7'damines varies from if^^ to i-[-|. It 

 differs from E. cardamines in having the discoidal spot of the 

 fore-wings at the junction of the white and orange spaces 

 instead of well within the orange space. It differs from the true 

 E. tiirritis by its smaller size, and by having the costa dotted 

 with black. The females resemble small females of E. car- 

 damines, and expand from ij\ to i/^. Both sexes appear 

 much more slender than E. cardamines^ even allowing for 

 difference of size. Under a powerful microscope the plumules 



