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the field he discovered a pair of the species sitting on the 

 grass stems in cop, and on looking round within a space of 

 25 yards he saw 20 or 30 such pairs, and took a good many 

 of them ; but on his going the next day, expecting to find 

 the species on the wing, he failed to see a single specimen. 

 Mr. Chaney remarked that A. cratcegi was at one time very 

 abundant near Rochester, and all over the Hundred of Hoo ; 

 in fact, commoner than Pieris brassicce, and was to be taken 

 on the wing, and also on the blades of grass ; but the species 

 had disappeared about the year 1871. L. sinapis used also to 

 be common in a wood the other side of Chatham in the year 

 1856, but gradually became scarcer and scarcer, and about 

 the year 1858 or 1859 disappeared altogether. Other species 

 which were at one time plentiful in that district, but had 

 since become extinct, were M. athalia and L. sibylla. The 

 fact that A. cratcegi was not found there now was very curious, 

 as the species had been so widely distributed over a large 

 tract of country, and the numerous food-plants were very 

 abundant, and appeared throughout the neighbourhood. Mr. 

 Carrington thought there was a general scarcity of butterflies 

 all over England, and possibly Great Britain. His first expe- 

 rience of A. cratcegi was in Yorkshire, in a rough place close 

 to Stockton Forest, where it was very plentiful, and the same 

 abundance was noticeable of M. galatea. In the year 1878 or 

 1879 there was a very severe winter, and the following sum- 

 mer both these species, with others, had utterly disappeared, 

 and almost all the butterflies in the neighbourhood became so 

 scarce that the local collectors had to get specimens from 

 other localities to complete their series ; and he felt certain 

 that in the younger days of old collectors the butterflies 

 occurred all over the country in numbers far exceeding any- 

 thing that we know of now, Mr. Tutt said that, although he 

 had never taken A. cratcegi, he knew that in 1868 hundreds 

 were captured near Chatham in a field used every month for 

 a cattle fair, the larvae being taken from the hedges surround- 

 ing the field. Mr. Frohawk mentioned that Mr. Wood, of 

 Chatham, had told him a few years ago that he took the pupa 

 of A. cratcegi off the plum-trees in that district, and that the 



