VADE MECUM. 117 



POLYOMMATUS ARTAXERXES, SCOTCH ARGUS. 

 Lewin pl.39.f.e,S. Donovan v. 16, p. Bil. Duncan pl.Si, fig. i. 



Butterfly. Wings abovp, black brown, underneath pale 

 drab : fringe white. Primary above, with a discoidal white 

 dot ; undenieatli witli a white di.scoidal, and five other white 

 spots between it and the posterior margin. Secondary wings 

 above, with five marginal .subocellated spots, iris interiorly 

 broad and orange, posteriorly slender and pale, pupil black ; 

 underneath with white scattered spots, and a large white 

 blotch near the margin. Both wings like the preceding 

 species have an orange-coloured band, terminating interiorly 

 in a series of black and white crescents, and posteriorly in a 

 white spot, with a black pupil. Knob of the antenna white 

 underneath and at the tip. 



Caterpillar. 



Chrysalis. 



Observation. The only known locality of this insect for a 

 long period was Arthur's-seat, Edinburgh ; but of late it ha-s 

 been fonnd elsewhere. 



POLYOMMATUS ARGIOLUS, AZURE BLUE. 



Lewin pl.36.f. 4,6,6. Donovan v. U,p. 481. Duncan pi. 31, fig. 1. 



Butterfly . Wings above, shining with a lilac tint, under- 

 neath French grey. Primary above, with a blackish pos- 

 terior margin fringe black and white; underneath with a 

 band formed of five slender transverse black streaks, next 

 that the anterior margin forming an angle with the rest ; 

 fringe white ; secondary with a white fringe above, with the 

 posterior margin terminating in a slender black line ; under- 



