TRIFID^. Ill 



back of the fifth, seventh and tenth segments, and strikingly 

 relieves the velvety black ground colour. The subdorsal 

 stripe is a broken series of pale yellow spots, and is followed 

 by two other broken series of similar spots ; sides olive-drab, 

 with three longitudinal yellowish or greyish-yellow stripes, 

 the middle one containing the spiracles, which are oval, 

 blackish, and ringed with yellow. On each body-segment is 

 a transverse row of ten bright red raised spots, bearing 

 fascicles of rather long light brown hairs ; but in the yellow 

 blotches these spots are also yellow, with brown hairs. The 

 subdorsal spots on the twelfth segment are greatly enlarged ; 

 on the back of the fourth they form transverse streaks at the 

 back of the red spots. On the second segment is a narrow 

 transverse bar of shining blackish, bearing a series of four 

 red warts. The pattern on the anterior segments is rather 

 obscured by the long hairs, of which those in front project 

 over the head. Undersurface drab, more dusky in front ; 

 legs and prolegs drab. (Condensed from Buckler.) 



Dr. Chapman says that the very young larva presents a 

 character in the small size, and weakness of the eleventh 

 segment, and its less conspicuous hairs, which agrees closely 

 with that found in the genus Acromjda. It is "a very 

 delicate whitish scrap, whose first duty is to eat up as much as 

 its neighbours permit of its egg-shell." It seems to linger 

 about, waiting for the last of the batch to hatch out before 

 beginning to attack its regular diet, but very soon shows a 

 greenish colour after commencing to eat. Feeding is begun 

 gregariously, all the larvae from the batch of eggs ranging 

 themselves side by side and marching forward exactly in line, 

 eating only the parenchyma or flesh of the leaf and leaving 

 the upper surface and even the smallest ribs. Its raised 

 spots or tubercles are large and conspicuous, each bearing a 

 single hair, except those above the spiracles, which have three 

 each. As the larva grows it gradually assumes colour, becom- 

 ing after the first moult creamy yellow, with red-brown 

 dorsal and subdorsal lines j the raised spots now carry more 



