POLYOMMATUS (lYO^INA) ALSUS. 103 



After this there is no change of appearance, save 

 that of growing paler and more unicolorous (perhaps, 

 as the bulk increases, more of the paler skin shows 

 between the dark bristles), until some specimens are of 

 an ordinary flesh-tint, and others of a brownish flesh- 

 colour, and at this point the larvae assimilate well with 

 the changing colour of the corolla of their food-plant. 

 After they cease feeding they turn off to a faint green- 

 ish-yellow. 



When full-grown the larva is about one-third of an 

 inch long, and may be roughly compared to a mode- 

 rately sized grain of wheat cut in half, the back being 

 arched in a curve and the belly flat with the legs placed 

 well under it. Or it may be compared to a very tiny 

 tortoise, the head being very small and retractile, and 

 a lateral ridge running all round, and giving the appear- 

 ance of an upper shell. The second segment is the 

 longest and has a sort of triangular plate on its middle, 

 and the last three segments are slightly depressed. 

 The inner rows of dorsal tubercles are rather projecting, 

 and thus form between them a sort of dorsal hollow ; 

 the second row I have already mentioned as affecting 

 the subdorsal line. (J. H., 9, 11, 70; E.M.M. VII, 

 186.) 



On the 5th of June, 1873, I received from the Rev. 

 J. Hellins a pupa of this species. The larva with 

 several others of its kind had been full fed in July, 

 1872, and soon afterwards Mr. Hellins had reported 

 they were beginning to hibernate ; the change to the 

 pupa state not taking place until June 3rd, 1873 ! 



This pupa, which I figured, was three and a half lines 

 in length and one and a half lines in diameter, mode- 

 rately plump in appearance, the head and thorax well 

 defined, the tip of the abdomen blunt and rounded. 

 When viewed in front its general form is that of a 

 narrow ellipse, but when seen sideways the prominent 

 swelling of the thorax and the tip of the abdomen bent 

 under, with the long wing-cases give the usual appear- 

 ance of the pupae of this genus. 



