356 PTEliOPHOKUS 11IEKACI1. 



pupa. (N. Greening, 20th May, 1867 ; E.M.M., July, 

 1867, IV, 39.) 



To this account Dr. H. G. Knaggs adds that on the 

 14th of June he reared the perfect P. hieracii from 

 larvae supplied to him by Mr. Greening. (E.M.M., 

 torn, cit., 40.) 



The full-grown larva is five lines in length, cylin- 

 drical, tapering a little behind, and a little in front 

 from the second segment to the head, which is a trifle 

 smaller and rounded; the segments appear very plump 

 from the divisions being deeply cut. It is of a pale 

 glaucous-green colour, with dorsal and subdorsal lines 

 of full green ; the tubercles are brown, bearing fascicles 

 of numerous white hairs, those on the thoracic seg- 

 ments very spreading, and it is altogether very hairy. 

 (William Buckler, October, 1871 ; B.M.M., December, 

 1871, VIII, 155.) 



As Pterophorus (Oxyptilus) teucrii is only single- 

 brooded, it allows itself more leisure for feeding than 

 some of its congeners, and may be found commonly in 

 the larval state from the middle of May till the end of 

 June. 



The mode of life of this larva is sufficiently curious. 

 It gnaws a deep round hole in the side of a stem of a 

 young shoot of Teucrium scorodonia, stopping the flow 

 of sap, and causing it to droop, then crawls (slowly 

 enough) to the heart and eats portions of the younger 

 leaves, biting them clean through like ordinary larvae, 

 and never, I believe, gnawing the surface of the leaf 

 like some of its congeners, nor entering the shoot like 

 others. It does not confine itself to one shoot, but, 

 after eating bits of several leaves, goes to another, 

 which it causes to droop in the same way. In wet 

 weather the shoots will recover and raise themselves, 

 but if the sun is hot and the weather dry, they wither, 

 and serve (like the shoots of spindle when mined by 

 the larva of Hyponomeuta pkimbella) as signal flags to 

 show where a larva is to be found. 



In confinement, the larva makes no attempt to enter 



