THE ENTOMOLOGIST 



Vol. XXXVII.l MARCH, 1904. TNo. 490- 



NEW FORMS AND NEW LOCALITIES OF SOME 

 EUROPEAN BUTTERFLIES. 



By Roger Verity, F.Fr.E.S., F.It.E.S. 

 (Plate IV.) 



PiERis RAP^, L. var. rossii, Stefanelli, Trans, of the Ital. 

 Ent. Soc. xxxii. (1900). — This fine and well-marked variety is the 

 summer form of var. 7nannii, Meyer, of the spring brood. It can 

 at a glance be separated from all the other forms of P. rapes by 

 the great development in size and intensity of the black mark- 

 ings, and may well be said to be the variety of P. rapce corre- 

 sponding to var. cheiranthi, Hb. of P. hrassiccB, L. The apical 

 marking extends to more than one-third of external margin and 

 has the shape of an equilateral triangle ; the black spot in the 

 middle of fore wing is in the male distinctly reniform in shape, 

 much larger than in the type, and suffused along the edges ; a 

 well-defined black streak connects its upper end to the outer 

 margin, which it joins just at the lower corner of apical patch ; 

 another streak runs parallel to the first, from lower end of reni- 

 form spot. Very often the space between these two streaks is 

 filled up with dusky. In the female the first spot is more or less 

 square in shape, three or four times as large as in type, and it 

 has the two streaks connecting it with margin more marked than 

 in the male. The second spot is distinctly crescent-shaped, with 

 the concave side turned towards the base. The costal spot of 

 hind wings is somewhat larger than in P. rapce. As to the under 

 side, it only differs from that of type in having the yellow colour 

 much brighter. 



This variety is so distinct that it might be thought a true 

 species, if intermediate forms, which connect it with P. rapce, 

 did not occur commonly. Prof. Stefanelli collects var. rossii 



ENTOM. — MARCH. 1904. " G 



