OIRRCEDIA XERAMPELINA. 79 



The first larva was found before the ash trees had 

 put forth blossoms, and ash buds were given it for 

 food, into which the larva ate round holes, burrowed, 

 and devoured the interiors. 



The second and full-grown larva came after the 

 ash had assumed its foliage, and it partook of young 

 shoots for a few days before spinning. The larva had 

 then attained nearly one inch and a quarter in length, 

 and was rather broad in proportion, the head rather 

 smaller than the next segment. Viewed sideways, it 

 appeared tapering gradually towards the head, and 

 from the eleventh segment to the anal extremity ; but 

 seen on the back, it looked of almost uniform width, 

 excepting just at each end The divisions deeply cut, 

 giving each segment a plump appearance. 



The larva, when two-thirds grown, is very sugges- 

 tive of lichen, and of a lichen-feeder. Its head is 

 shining dark grey-brown, mottled and streaked with 

 darker blackish-brown ; a black shining plate on the 

 second segment having two rather broad angulated 

 whitish stripes. The back and sides are brownish- 

 grey, delicately mottled with a darker tint of the same. 



The dorsal stripe is dirty whitish, edged with black, 

 and is on the third and fourth segments continuous, 

 but contracted and expanded, while on the others it is 

 only visible, and expanded towards the end of each 

 segment, excepting the twelfth and thirteenth, where it 

 is widened into a broad blotch, extending to the sub- 

 dorsal region, and strongly margined with black ; 

 from its base on the middle segments is a brownish- 

 grey streak on either side, curved obliquely forward to 

 the middle of the subdorsal line. The tubercular dots 

 whitish, delicately ringed with black, and with minute 

 black centres, each with a short and very fine hair. 



The subdorsal line is a very thin thread of dirty 

 whitish, delicately and interruptedly edged with black ; 

 the space between it and the spiracular region is 

 greyish-brown, darker than the back, and having a 

 paler blotch in the middle of each segment. 



