VADE MECIIM. ] J 5 



POLYOMMATUS DORY LAS,' COMMON IMATR. 

 hewin, pi. 38,/. 4, 5, 8. 



liutterfly. Male above, of a bright lilac bhn>, or an it were 

 silljy, with a posterior margin, black anterior and friiiffe 

 white. Female wing.s above, brown, with a disk more or 

 less blue, also sometimes entirely brown, witli a band at the 

 posterior margin of orange subocellated spots, common to 

 both wings ; underneath the wings are of a deep ash-colour 

 or drab. Fringe barred with brown. Underneath, in both 

 sexes, nearly the same as in tlie two preceding species, (viz. 

 P. Corydon and P. Adonis), but the central white spot in the 

 disk of the secondary wings 1ms an indistinct pupil. 



Caterpillar. Hairy, bright green, with a dark dorsal line, 

 and triangular yellow lateral spots adjoining. 



Chrysalis. Dark brown. 



POLYOMMATUS ARCUS, SILVEU-STl'DDED BIA'iv. 



Lewin pl.39.f.5,G,7. Donova/i v.4,p. 143. Oiincan pl.33,/if!.:i. 



liultcrjly. Male. Wings above, blue with a tint of lilac, 

 posterior margin and veins black and broader than in P. 

 Dorylas, anterior margin and fringe white ; underneath 

 blueish, especially at the base. Primary with six black 

 discoidal ocellated spots, the three intermediate ones arc 

 oblong with the posterior pair inclined towards each other, 

 the others round ; a double band of black sjjots at the pos- 

 terior margin, with a liiint tawny l)and often between tliem. 

 Posterior margin of the secondary wings Hndemcath, with 

 an articulate orange-tawny band, containing six silvery blue 

 spots, and crowned by a series of black crescents ; sometimes 



• Qufflic. Is this I'. Alexis of Stepliens' list? 



