P YRA USTIDA-:~BO T YS. 223 



white, and rather elongated ; another is, in some specimens, 

 obscurely visible near the base of the dorsal margin ; cilia 

 shining brown. Hind wings rather angulated at the apex, 

 rounded behind ; dusky-white, the hinder half shaded with 

 faint smoky-brown, and a cloudy band of blacker brown 

 lying along the hind margin ; cilia white, intersected by a 

 brown line. Female similar. 



Underside of the fore wings olive-brown ; costa white to 

 the middle, where is a long squared discal white spot ; 

 beyond are several white costal streaks ; hind margin edged 

 by a yellowish-white line in which is a series of black streaks. 

 Hind wings shining white ; the central spot a slender 

 crescent, smoky-black, as also is a dot at the end of the 

 cell ; beyond the middle is a slender curved transverse 

 smokj^-black line, and along the hind margin a series of 

 black streaks in a yellowish line. Body and legs shining 

 white. 



Not very variable, but the smaller white spots of the fore 

 wings are not unfrequently absent. 



On the wing from the end of Maj' till July. 



Larva nearly an inch long, and of jaroportionate bulk ; 

 cylindrical, tapering very slightly at the extremities ; 

 segments plump, but with a depression across the middle ; 

 skin glossy and semitranslucent ; head shining, the lobes 

 rounded, grey marbled with black, the mandibles brown ; 

 general colour pale bluish-grey, sometimes with an under- 

 ground of pale green ; dorsal line dark green ; and a pale 

 greyish strijje, almost a ridge, lies along the spiracular region ; 

 raised dots large, glossy and intensely black ; ventral surface 

 and prolegs of the same colour as the dorsal area ; legs 

 black, highly polished ; immediately below the spiracular 

 stripe is a series of oval black spots, one on each segment ; 

 yet lower, each placed a little behind, is a similar series of 

 spots; and lower still one at the base of each leg and 

 proleg, whilst those segments which have neither legs 



