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Show 208 MR. E. B. POULTON ON THE PROTECTIVE [Mar. 1, T A B L E III.-Not Inconspicuous Larva, ivhichi Species of Larva. Papilio ma-chaon. Arctia caja Phragma-tobiafuli-ginosa. Spilosoma menthastri. Lasiocampa rubi. Lasiocampa quer-cus. 0den est is potatoria Method by which rendered more or less conspicuous. Green, black, and orange. " A striking appearance" {Weismann). Granting that this is so, when the larva is looked at alone I think that its colours harmonize well with its umbelliferous food-plants. However, when disturbed the pinkish-red everted glands do render it conspicuous; but this is after discovery. Black, with very long grey and brown hairs. Freely exposed on dead nettle, & c , although the colour is not such as to at once attract attention. Smoky brown, with brown hairs. Freely exposed on dock &c.; as above, it is not truly conspicuous. Brown, with longbrownhairs. Freely exposed on all low plants; as above. Black and brown, with long brown hairs. Freely exposed on heather &c, as above ; more conspicuously coloured with black and yellow bands when younger. Brown and yellow, and comparatively conspicuous when young; black with white marks and brown and grey hairs when older; exposed but not conspicuous on hawthorn. Blue-grey, black, and orange; tufts of white hairs ; freely exposed on grasses. Easily seen, but does not attract attention. i Unpleasant attribute. A pair of dorsal pro-thoracic glands, everted when an enemy approaches, and causing a most penetrating odour like " decaying pineapple " {Buckler); especially noticed in fourth stage. Jenner Weir thinks that " flavour is nauseous " and that the hairs act as a warning. Nevertheless I a m assured that the shorter hairs are irritating (W. Cole). Evidence, as far as it goes, against there being any unpleasant attribute, but only tried with Lizards. In this case much evidence for the larvae having unpleasant taste. Jenner Weir thinks hairs are warning. I believe that there is evidence for the hairs having irritating properties. I believe that there is evidence for the hairs having irritating properties. The hairs are certainly irritating, although it takes some time to affect the hands. Results J. Jenner Weir. Disregarded by all the birds. Young and comparatively hairless ; tasted and refused by many birds; disregarded by all when older and very hairy. A. G. Butler. Devoured by L. vin dis. Disregarded by all the birds. Disregarded by all the birds. |