the wings. The under side is ash coloured, with a 

 discoidal black crescent, edged with white, on each 

 wing, and a transverse series of ocellated dots to- 

 wards the hinder margin ; on the hinder wings this 

 series is very irregular, and there are several scat- 

 tered spots towards the base. Fringe of the wings 

 white. 



This delicate little butterfly, the smallest of the 

 European Polyommati, seems to occur, but not in 

 great abundance, in most parts of the kingdom. Nu- 

 merous localities, scattered over the southern parts of 

 England, have been cited for it. Mr Wailes informs 

 us that it is common on the magnesian limestone 

 district near Newcastle : it is also found in woods 

 near Durham ; and we have seen specimens from 

 most of the southern counties of Scotland. 



MAZARINE BLUE BUTTERFLY. 



Polyommatus Acis. 

 PLATE XXXI. FIG. 4. 



Polyommatus Acis, Stephens. Pap. Cymon, Lewin, pi. 38. 

 f. 6. & 7 Polyom. Cymon, Jermyn. Lycaena Cymon, 

 Leach Pap. Argiolus, Hiibner. 



EXPANDS about 13 or 14 lines, the male deep blue 

 above, glossed with violet, having a narrow black 

 border to all the wings, and a white fringe. The 



