302 THE ENTOMOLOGIST. 



with very minute black points, adding depth to the pale olive- 

 yellow ground colour ; the claspers are of the same colour, and 

 bear a pair of simple white spines ; the legs are dusky. 



Shortly before first moult it measures ^ in. long, the ground 

 colour is creamy white, the sides and ventral surface are mottled 

 and chequered with pale ochreous brown, the cream colour 

 forming longitudinal dorsal and spiracular stripes ; the surface 

 is particularly glossy. 



First moult occurred on Aug. 20th. 



Before second moult it measures ^ in. long. The shining 

 surface of the body is covered with minute black points ; each 

 segment from the fourth to eleventh inclusive has six prominent 

 tubercles, each set with a number of serrated bristles ; these 

 form longitudinal rows, the first being subdorsal, the others 

 super and subspiracular ; along the lateral edge and l)ase of the 

 claspers is another row of much smaller tubercles ; the first seg- 

 ment has eight, the second smd third segments have each ten, 

 and the twelfth has four tubercles ; all are black and bear 

 bristles ; numerous black hairs are scattered over the surface, 

 each having a black shining base ; the head, black and shining, 

 is also beset with black bristles ; there is a dorsal cluster of 

 similar bristles in the centre of both the first and last segments. 

 The ground colour is a pale lilac-grey, with a fine medio-dorsal 

 stripe and an ochreous spiracular band ; the subdorsal surface 

 is chequered with blackish ; the legs are shining black. 



At the least disturbance they fall from the food-plant and 

 remain rolled up in a ring for about two minutes. 



On Aug. 22nd I counted ninety-two larvse in different stages, 

 but the majority in the second stage. 



Second moult on Aug. 24th. 



Before third moult it measures | in. long, being very similar 

 to the previous stage, except the colouring is more pronounced, 

 and the tubercles are developed into short spines, but bearing 

 bristles as before. They are very active in their movements, 

 running rapidly, and feed voraciously. 



Third moult, Aug. 29th. 



On Aug. 30th I placed seventy-three larvae on dog-violet 

 (Viola canina), but all refused to eat it, so transferred them to 

 V. tricolor, when they immediately commenced feeding. 



Before fourth moult it is ^^ in. long while extended crawling. 

 The ground colour is chiefly black, with a broken double greyish 

 white medio-dorsal line, and sprinkled all over with minute black 

 hairs, each encircled with whitish at the base ; a creamy white 

 lateral line, on which are situated the subspiracular ochreous 

 spines, each having a swollen bulbous deep amber base; the 

 dorsal spines are almost black, having only the tips dull 

 ochreous, and a smaller amount of dull amber colour on the 

 base ; the spines on the first three segments are more amber 



