248 THE ENTOMOLOGIST. 



in abundance and beautiful condition ; Ccenonynipha parnphilus, 



rather scarce ; Melanargia galatea, abundant. 



Harrow Weald, 

 October, 1918. 



SOME MINOR BUTTERFLY ABERRATIONS OF 1918, AND 

 NOTES THEREON. 



By Hugh P. Jones. 



Having only recently paid much attention to the Lepidoptera, 

 my series of the butterflies, at least, are decidedly meagre and 

 invariable. So this year (1918) I determined to give the last- 

 named family a thorough overhauling for varieties. 



I started operations in May on Pieria napi and Euchloe 

 cardammes chiefly because their numbers offered a fair chance of 

 success, P. hrassica and P. rapa: being the reverse of common. 

 In fact I only saw one brassicce, the parasites of last year evidently 

 having been too much for them, as frequently happens after a 

 period of abundance. 



Pieris najii. — Of this interesting and variable species I took at 

 least two worth mentioning. Both were males, and one is totally 

 destitute of spots on the upperside, and with the usual black 

 apical patch reduced to a few faint, wedge-shaped markings 

 along the veins, producing a rather striking effect, which will be 

 readily understood if one remembers how characteristic even the 

 faintest of black markings are to the species, and then imagines 

 them taken away. For, at a first glance, my specimen looks all 

 white in the cabinet, even in comparison with the preceding one, 

 itself faintly marked, similar to the first example shown on 

 pi. 13 of South's ' British Butterflies.' My second specimen 

 has all the wings on the underside exactly the same as the 

 upper, i. e. pale creamy white, without a trace of other colour. 



Black scales along the veins thick as usual, and appearing 

 doubly effective against the pale background. Upperside typical, 

 although markings somewhat reduced. A large insect, 2 in. 

 across the wings. Rich, yellow undersides from the same 

 locality (Shelford) were also much in evidence, but all — even 

 those from the Feus — of a much clearer and paler yellow than 

 in the best Irish examples. 



As regards the type of the S spring brood (upperside), fig. 2, 

 pi. 13 of South is the prevailing form about Cambridge, although 

 a more heavily-spotted race is almost equally as abundant. In 

 fact, the chief difference in the $ upperside, between first and 

 second brood napi, is in the shajie of the wings, and not markings, 

 those of the spring form being rather narrow, and the upper 

 pair somewhat pointed, whilst in the later insects the apices 



