ACRONYCTA ALNI. 19 



stem, or cork, or other similar substance, wherein to 

 excavate the chamber requisite for its pupation. (W. 

 B., Note Book IV, 71—73, and 148, 149). 



ACRONYCTA RUMICIS. 



Plate LVII, fig. 3. 



A larva found on peach, September 19th, 1874, one 

 and a half inches in length, moderately stout, segments 

 plump and well defined, the twelfth with two slight 

 dorsal humps behind, tubercles bearing radiating hairs. 



The ground-colour of the back as far as the spiracles 

 deep ochreous, streaked and freckled with black ; on 

 the back of each segment from the fourth to twelfth 

 inclusive a large quadrate velvety-black area, contain- 

 ing near its outer edge on either side an oblong 

 squarish subdorsal blotch of pure white, the dorsal 

 spot of bright orange being in the middle of the black 

 at the front of the segment, and surrounded by the 

 black area behind as far as the second tubercle, when 

 the black is relieved by a thin transverse bar of bright 

 orange-red, and this in turn by another bar of the 

 freckled ground colour ; the spiracles white, set within 

 a velvety-black shuttle-shaped mark, giving a strong 

 relief to the white subspiracular stripe, which forms a 

 projecting zigzag ridge; below this thewhole ventral sur- 

 face and ventral and anal prolegs are deep smoky-brown. 

 The five tubercles on each side of a segment have the 

 dorsal pair very close together and pinkish ; the front 

 one of these is situated on the hinder end of the white 

 subdorsal blotch, the hinder one is a little nearer the 

 side, the next below is brownish-grey, and the follow- 

 ing one is red, on a bright red roundish larger spot, 

 upon the white subspiracular stripe, which it inter- 

 rupts ; the lowest tubercle is grey-brown. The hairs 

 that radiate from the dorsal tubercles of the fifth seg- 

 ment are dingy and smoke-coloured, and are some- 



