REPORTS OF MEETINGS. 
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Dec. 18th, 1900.— Member elected.— Mr. W. R. T. C. Hewett, 
of Alcombe, Dunster, Somerset, was elected a member of the Society. 
Hunstanton Lepidoptera.— Mr. S. J. Dell exhibited Lepidoptera 
taken by him at Hunstanton between June 23rd and July 7th, 1900, 
including Heliophila littoralis and Ai/rotis mpae. 
Photographs of Aporia crat.egi.— Dr. T. A. Chapman, some 
photographs of the pupal wing covers and of the underlying immature 
wings of Aporia crataetji, which demonstrated that in an early stage 
the wing-markings agreed with those visible on the pupa case, the 
latter being the reverse of the markings on the wing of the fully- 
formed imago, as had been pointed out by Mr. Mem field. 
Aromia moschata, etc.— Mr. F. B. Jennings, Aromia moschata 
from the Lea Valley, and Mdanotus punctolineatus from the Deal 
sandhills. With reference to the latter insect, Mr. Jennings remarked 
that it used to occur at Wimbledon, but had not been taken there for 
some time. It was probable that Deal was now the only known 
locality. 
Operophthera brumata and Erannis defoliaria.— Mr. C. P. 
Pickett, some 0. brumata and If. defoliaria from Epping Forest. The 
series of 0 . brumata showed considerable'range of variation, and in¬ 
cluded pale-banded and dark forms. 
Malformed Epirrita. —Mr. A. Sich, a malformed Epirrita having 
an indentation in the margin of the forewings. Mr. Sich considered 
the specimen to be If. autumnata. The insect was bred from a larva 
taken on elm at East Hoathly, Sussex, and emerged on November 7th, 
1899. The larva was stated to have resembled that of If. dilutata, 
but had a primrose-coloured lateral line. Mr. Prout said the descrip¬ 
tion of the larva answered to that of Jf. autumnata, but the imago 
exhibited was certainly an unusual form of E. dilutata. 
Lymantria monacha.—Discussion.— Mr. L. B. Prout, on behalf of 
Mr. Rydon, exhibited a series of Lymantria monacha bred from ova in 
a damp atmosphere with the object of testing the theory connecting 
melanism with moisture. Some of the specimens shown were darker 
than the normal form, but in the absence of the parents it was impos¬ 
sible to judge whether this tendency was spontaneous or hereditary. 
An interesting discussion on the subject followed, in which Dr. Chap¬ 
man and Messrs. Bacot, Heasler, Kaye, Prout, and Sich took part. 
Mr. Prout expressed the opinion that it was impossible for any notice¬ 
able effect to be produced in one generation. Dr. Chapman, on the 
other hand, urged that the development of a tendency to a darker or 
lighter form was possible even in a single generation, and this view 
was supported by Mr. Bacot, who suggested the brood was composed, 
roughly speaking, of two groups of individuals, the one able to thrive 
in a damp atmosphere and the other requiring dry conditions. Thus, 
a damp season would tend to eliminate the light forms, while a dry 
season would kill the darker forms. Mr. Bacot expressed his regret 
that Mr. Rydon had not given any details as to the mortality in the 
various stages of his brood of L. monacha. At the request of the 
