13 



iiig, in tho same locality, the larvte in great plenty on the Oenm rivale, 

 and was able thereby to confirm the statements of Linne and DeGeer. 

 The larva generally reposes by day on the flower-stalk, not far from the 

 flower, and as it would appear, it only begins to feed towards evening, 

 when it bores through the calyx of the flower, and eats into the latter, 

 yet without penetrating further than its head, or at any rate, the anterior 

 half of the body. It gnaws out in this way the entire flower, destroy- 

 ing not merely the calyx, but also the corolla and fructification. That 

 it does not live concealed within the flower is shewn by the various 

 sizes of the generally circular boring-holes around the flower which is 

 attacked, these holes corresponding to the different sizes of the larva 

 at the time of its boring into the flower. 



"The full grown larva is about six lines long, and is attenuated at 

 both ends. The wooden legs so peculiar to some of the Pterophorus 

 larvse are very characteristic. Its small head is glassy yellowish-green, 

 marbled Avith irregular brownish spots. The ground colour of the body 

 when young is pale whitish, but with increasing age it gradually becomes 

 of a pale green. A narrow darker dorsal line, of which the colouring varies 

 from green to brown and reddish-brown, runs from the head to the 

 anal segment. On each side of it, parallel to it and of similar width, 

 is a whitish longitudinal stripe. Each segment bears ten warts, which 

 are scarcely perceptible on the three first and two last segments, but 

 are very distinct on all the others, and are so placed that the two largest 

 on each side of the darker dorsal line come exactly in the paler lines, 

 which are parallel to it, and the others follow in regular gradation, 

 smaller and smaller as they approach the prolegs. From each wart 

 arise tw^o long and thick, and several short and more feeble hairs, which 

 being all of a white colour and diverging in direction, give to the entire 

 body of the larva the appearance of a whitish and bristly clothing. 



"Preparatory to its change to the pupa state the larva fastens itself 

 by the anal extremity, as in some of the larvae of Diurnal Lepidoptera; 

 it turns to a pxipa, of which the colour varies from green to dark brown, 

 with a sharply defined darker dorsal line. 



"The dark-bordered wing sheaths, with their shading, the darker 

 dorsal line, and the regular position of the tufts of bristles give it a 

 striped appearance. It is clothed quite similarly to the larva, with 

 parallel rows of such tufts, of which the two nearest the dorsal line are 

 the most distinct, the othei's are smaller and less conspicuous. In each 

 tuft two short bristles protrude, which seem to correspond to the two 

 long hairs which project from each tuft of the larva. 



"The imago makes its appearance in from a fortnight to three weeks. 



