20 PIERIS RAPjE. 



were two spots of this colour on each segment along 

 the spiracular region, the spiracle itself being situated 

 in the middle of the anterior spot ; it was dark red out- 

 lined with black. 



The green surface was thickly sprinkled with minute 

 black points of two sizes, the smallest required the aid 

 of a lens to be seen ; these appeared to have no regular 

 order beyond a tolerably equal distribution (no pale 

 dots visible). The black dots did not extend very far 

 below the spiracular region ; each emitted an extremely 

 fine pale hair ; low on the side above the legs the hairs 

 were paler and longer. 



The green head was also thickly set with fine short, 

 pointed black hairs. 



The subdivision of the ordinary segments was into 

 six rings, but they were by no means conspicuous. 

 (W. B. 5 Note-Bock II, 124.) 



PlERIS NAPI. 



Plate II, fig. 4. 



On the 28th of June, 1874, I found larvae of this 

 species on Hesjperis matronalis ; they were then half an 

 inch long, but they grew very rapidly, and by the 3rd 

 of July they had attained their full size of one inch and 

 one line. 



The form was cylindrical with the head rounded ; 

 the skin soft and velvety looking, of a rather deep 

 glaucous green, with the dorsal surface irrorated as far 

 as the spiracles, with very minute black points, each 

 emitting a fine short hair ; the usual tubercular dots 

 (i.e. the trapezoidals and transverse thoracic series of 

 threes on either side and one on the side of the other 

 segments above the spiracles) were greenish- white. 



Below the spiracles the ground colour is rather paler 

 than on the dorsal surface, a faintly paler spiracular 

 line separating the paler from the darker green ; on 



