168 HIPPARCHIA TITHONUS. 



The young larva eats the empty eggshell ; it has the 

 head large and globular, the usual dots large, each with 

 a stiff hair ; the ground colour is whitish-grey, with 

 rusty yellow dorsal and subdorsal lines ; along the 

 spiracles are two fine lines connected on each segment, 

 and so looking like a row of squarish patterns, the head 

 yellowish, the dots brown, the hairs whitish ; the front 

 segments show the internal vessels. In October, after 

 the first moult the larva becomes green, with brownish 

 head ; in January it is noted as being of a vivid full 

 green, with a few blackish hairs, the head pale 

 greenish; in March it is 6 mm. long, in colour full 

 green, with dark green dorsal line, yellowish-green 

 subdorsal line, and whitish-green spiracular line ; head 

 pale green, tinged with brownish, the skin with a few 

 blackish hairs. In April it is about 12 mm. long, in 

 colour greenish -grey, with dark dorsal, indistinct 

 greenish-white subdorsal, and whitish spiracular line, 

 head pale greenish-brown. At the end of April it 

 moults for the last time, in June it becomes full fed. 

 The full-grown larva is about 19 mm. long, stoutest at 

 about the seventh segment, thence tapering to either 

 end, the back rounded, and the slope towards either 

 end falls in a curve ; the belly is flatter, the head wider 

 than the second segment, and flattened in front, the 

 face being rather wider below than above ; the sub- 

 dividing rings give a wrinkled look to the skin ; the 

 whole body, head included, is closely set with fine short 

 pale bristles ; the anal flap with two short spines 

 pointing backwards. The colouring varies a little, 

 generally the ground is pale ochreous freckled closely 

 on the back with reddish-brown ; the head freckled 

 rather darker than the body, and the lobes outlined 

 with a dark line ; the dorsal line dusky, widening on 

 the middle segments ; the subdorsal line a little paler 

 than the ground, edged especially above with some dark 

 freckles ; the subspiracular stripe pinkish- white edged 

 above with brown freckles, and followed below by a 

 yellow tinted stripe, belly like the back; the spiracles 



