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Mr. Bond exhibited a series of small pale examples of Lasiocampa trifolii. 
He had made a similar exhibition a year or two since, and Mr. Mitford, 
their discoverer, furnished the following information, tending to prove that 
they formed, at any rate, a distinct local form. The locality is Romney 
Marsh, Kent, and the larvee were first found by Mr. Mitford in May, 1866, 
feeding in the tufts of a very wiry grass growing in the shingle above high 
water mark; they were again found and bred in May, 1867: in August, 
1868, two dead moths, exactly similar, were observed in the same locality : 
and in August, 1871, eighteen examples were bred. While hunting for 
these larve, Mr. Mitford’s son found smaller caterpillars, which produced 
Lithosia caniola, thus showing an entirely new locality for this species. 
Mr. Bond further exhibited two remarkable varieties of Clisiocampa 
castrensis. One of them, a female, had the left-hand wings shaped like 
those of the male, though the insect otherwise showed no tendency to be 
gynandromorphous; the other, also a female, had the right-hand under 
wing marked and banded as in the upper wing. 
Mr. Stainton exhibited, on behalf of Mr. D’Orville, a singular variety of 
Agrotis comes, of Hiibner, according to Staudinger’s recent Catalogue, 
equivalent to the Triphzena orbona of authors. 
Mr. M‘Lachlan exhibited a striking case of mimetic resemblance between 
two common North American Libellulide, not very closely allied. These 
were Libellula pulchella, of Drury, and Plathemis trimaculata, of De Geer. 
In I. pulchella the sexes were nearly similar with respect to markings; in 
P. trimaculata they were dissimilar, and the female bore a remarkable 
resemblance to either sex of L. pulchella, both in the ornamentation of ate 
wings and in the thoracic markings. 
Mr. Bates said he had never observed any similar instance, and was 
inclined to consider this case as one in which the markings had repeated 
themselves, rather than as indicating actual mimicry. 
Prof. Westwood suggested that observations should be made as to 
whether the female was liable to the attacks of fishes when depositing her 
ova, and instanced the case of Ephemera, in which the fish eagerly devoured 
the female insect when full of eggs, but rejected the male as affording no 
nutriment. A discussion ensued as to the liability of dragon-flies to the 
attacks of birds. Mr. F. Smith had seen swallows engaged in the pursuit 
of small Agrionide, and Mr. Briggs had witnessed, in the streets of London, 
a combat between a sparrow and a large dragon-fly, probably an A%schna, 
and in this case the insect overcame the attacks of the aggressor. It was 
suggested whether this latter case might not have been an exemplification of 
the natural pugnacity of the sparrow, rather than an indication that the bird 
attacked the insect with a view to food. Mr. Jenner Weir incidentally 
mentioned that he had himself witnessed the fact of an Agrion descending 
into the water to deposit its eggs. The President thought the larger species 
