98 POLYOMMATUS (LYC^NA) ARGIOLUS. 



flesh-coloured, the whole skin of the body velvety, with 

 its surface thickly covered with yellowish warty 

 granules, each bearing a minute bristly white hair. 



Another variety, of the same yellowish-green ground 

 colour, has dashes of deep rose-pink on each humped 

 ridge of the back and in the dorsal channel continued 

 to the anal end, and an additional dash on each side 

 of the fifth segment ; along the sides, fine double lines 

 of pale greenish-yellow, edged with darker, slanting 

 backwards ; the sub-spiracular ridge itself of a whitish- 

 flesh colour, but deepening above and below with a 

 narrow border of full rose-pink, which again melts 

 into the green ground. 



Another variation, which from the too rapid develop- 

 ment of the example exhibiting it, was but imperfectly 

 noted, is of a very pretty mixture of green and black ; 

 the ground colour green as before, a transverse bar of 

 black across the middle of the second and beginning 

 of the third segments, a dorsal series of thick dashes 

 from the third to the tenth ; the eleventh with a dash 

 on either side enclosing the green ground as an inter- 

 ruption, with the dorsal marking again occurring on 

 the twelfth and thirteenth segments ; on each ridge of 

 the back is a row of roundish spots, and a little lower 

 on the side, a row of squarish spots and lower again, 

 in the spiracular region is a row of roundish spots 

 placed at the segmental divisions ; on the fifth segment, 

 the upper markings are thicker and run together. 



About four or five days before changing the larva 

 ceases to feed, becomes of a dingy olivaceous- pink or 

 mouse colour, and spins a fine layer of silk as a foot- 

 hold and a stout thread as a cincture, crossing the 

 front of the third segment, and strengthened near the 

 base on either side by two other short threads joining 

 it, thus forming triple moorings. 



In each instance I found the operation of changing 

 to a pupa had brought the cincture away from its 

 resting place on the larva to below the thorax of the 

 pupa, so that this thread, at first slanting forwards 



