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made more probable by the fact that two other female 
specimens had more or less complete broad black borders on 
the hind wings. He thought that the spot referred to in 
P. rape might possibly be an ancestral character. 
Mr. A. M. Montgomery, on behalf of his brother, Mr. E. 
M. Montgomery, exhibited numerous specimens of Pveris 
napt, and communicated the following notes: 
‘“‘ All the specimens exhibited, with the exception of a few 
of the spring brood, were bred from ova laid on May 26th, 
1896, by a female captured at Harefield, Middlesex. All the 
larvee of this brood pupated on and about June 2oth. 
““Twenty-eight specimens (seventeen males and eleven 
females) emerged between July 4th and 7th; but a larger 
number remained in the pupal state until the spring of 1897. 
‘‘A few more winter pupe were obtained from ova laid on 
July 12th by a female captured at Ealing. The larve of 
this lot pupated about August 8th, and none produced 
butterflies the same year. Most of the pupe which pro- 
duced the summer brood were green, whilst the majority of 
the winter pupze were of the brown form, and often heavily 
marked with black. 
‘‘ Forty-two specimens (twenty males and twenty-two 
females) emerged between April 21st and May 14th, 1897. 
The spring insects are rather smaller, and have narrower 
and more pointed wings than the summer ones. 
‘“The summer males all have the black tip of the fore- 
wings well developed, and the central black spot large and 
dark. One has a second well-marked black spot on the 
upper wings, situated between the usual spot of the fore- 
wings and the black mark on the upper margin of the hind 
wings. Three other specimens also have traces of this 
second spot. The black mark on the upper margin of the 
hind wings is generally well shown. 
‘“The spring males are much paler. The black tip is 
usually much broken up between the veins, and is almost 
obliterated in one specimen. In this specimen the black 
spots of both fore and hind wings are entirely absent. In 
other cases these spots are reduced to a few black scales, 
and in no case are they as well developed as in the summer 
brood, and none have any trace of a second spot on the 
upper wings. 
‘The females of the summer brood usually have the black 
tips of the fore-wings and the usual black marks very large; 
but in a few cases the black tip is smaller and greyish, and 
the spots smaller, but deep black. In the darker specimens 
