ACRONYCTA ALNI. 15 



bore a pair of long clubbed hairs on each side of the 

 second segment, all the other hairs being simply 

 pointed, and of ordinary length ; the dark segments 

 were now blacker and a white subspiracular line ran 

 from the second segment to the ninth ; after a couple 

 of hours this larva began to feed. The leaves now 

 being eaten clean away between a couple of ribs, in 

 oblong portions, in a way which should well indicate 

 the presence of this larva on an alder tree ; and the 

 singular way in which the larvse rest, with the head 

 turned round to the tail, has been constant with each 

 of them from the very first. 



Two individuals of this third moult had not only the 

 two pair of clubbed pale whity-brown hairs on the 

 second segment, but a pair equally long and divergent 

 on the eleventh and twelfth segments, while on other 

 segments, excepting the third, fourth, and seventh, 

 the light-brown hairs are decidedly thickened and 

 rigid, blunt at the ends, and on the eighth, ninth, and 

 tenth have a slight clubbed or thickened, but flat 

 appearance ; the colour of the back on the fourth seg- 

 ment was cream colour, with light-brown tubercles ; 

 the hinder part of the back of the tenth, with the 

 whole upper area of the eleventh segment, of a rich 

 cream-colour, a dorsal line on the twelfth, and the 

 whole of the thirteenth segment creamy-white. By 

 the 22nd of July they had grown to be about an inch 

 long, and the colouring of the dark parts of the back 

 was olive-brown, the tubercles black and prominent, 

 excepting the dorsal pair on the fourth segment, which 

 had only the tips black of their outer portion, the inner 

 portion pale olive-brownish ; those on the back of the 

 twelfth segment were dark olive brown ; the tubercular 

 spots on the sides and ventral prolegs were black, but 

 very much smaller and less prominent than those of 

 the back ; the plate on the second segment was black, 

 bearing six prominent black tubercles, the margin of 

 skin next the head being white, and the sides along 

 the spiracular region were white on the anterior 



