THE ENTOMOLOGIST. 165 



recommenced feeding in February, 1872, and fed from that 

 time to their attaining their full growth, first on foxglove, and 

 afterwards on Pyrus japonica. They underwent two monlls 

 before they were full fed, which they were from April 4lh to 

 IQth. Subsequently I took a number of larvae at large, 

 feeding on bramble, sallow, and hornbeam. The following is 

 a description of the full-fed larva : — Length, when at rest, 

 about 1 inch ; when extended, 1 inch and 4 lines to 1 inch 

 and 6 lines. The head is very small, less than 2nd segment, 

 and retractile thereinto. The antennal papillae are con- 

 spicuous. The body is obese and cylindrical, attenuated in 

 front. Each segment is full and rounded. The skin is 

 transversely wrinkled, and there is a lateral skinfold below 

 the spiracles. Both the head and body emit slender whitish 

 bristles. Head wainscot-brown, with two parallel dark brown 

 marks, one on each side of the median suture. The colour of 

 the body varies slightly. That of the more usual type 

 (which is the one always taken at large by me) is ferruginous 

 or olivaceous-brown, delicately reticulated with darker; the 

 segmental divisions usually tinged distinctly with rosy. The 

 dark reticulations on the back form a series of somewhat 

 indistinct lozenge-shaped marks, one on each segment from 

 5th to 12th, their edges shading oflF into the ground colour. 

 Through the centre of this series of lozenges runs the thread- 

 like and indistinct medio-dorsal line, which is ochreous, 

 finely bordered with brown on each side; it is almost 

 obliterated in the centre of each segment by the dark lozenge. 

 On the 12lh segment the lozenge is reduced to a triangle, 

 which is usually more clearly defined than the marks on the 

 other segments. Its apex points forwards. The subdorsal 

 line is ochreous, and is to be traced throughout the length of 

 the larva from 2nd to 12lh segment, but is most distinct and 

 broadest on the posterior segments ; it is bordered through- 

 out, on both sides, by a fine brown line, and surmounted on 

 each of the 5th to 12lh segments by a conspicuous velvety 

 dark brown, almost black, spot, of somewhat triangular form, 

 the apex of the triangle pointing forwards; the spot on the 

 5th segment, is, however, almost linear and indistinct ; the 

 others increase gradually in size towards the anal extremity 

 of the larva, those on the 11th and 12th segments being the 

 largest; on the posterior edge of the 12th segment the sub- 



