| OCR Text |
Show 1887.] VALUE OF COLOUR AND MARKINGS IN INSECTS. 235 (continued). Light Ground-colour aud Darker Secondary Colours. Species. Ground-colour. Colour next in importance. Larva of C. verbasci Larva of D. caruleocephala Larva of H. wa varia Larva of D. galii Pale green. Smoky green. Green, varying to lead-colour. Yellow, varying through light green, olive-green, various shades of brown to black (in tbe last case should be in oppo site column). Yellow. Yellow. Yellow. Black. 3rd colour. 4th colour. Black. Black. Smoky. Yellow or white it in at all a marked degree (A. grossulariata and A. filipendula), and one of these is partially striped. Combination of Ring and Stripe, and of Ring and Spot, and Stripe and Spot.-Also suited to the cylindrical body-form, and occurring in larvae and in one imago only (E. jacobaa). Hence the existing arrangement of many widely separated conspicuous insects possessing a similar type of pattern is due to the fact that there is a limited choice of available patterns, as well as to the factors conducing to convergence. In addition to this there is probably in some cases a certain amount of true mimicry in the acquisition of patterns and colours. Thus it is more than probable (as has been previously suggested by other observers) that the species rendered conspicuous by alternate rings of black and yellow gain great advantages from the justly respected appearance of Hornets and Wasps. It must not be,forgotten, however, that the latter |
