POLYOMMATUS. 89 



17. P. pheres Boisd. Ann. Soc. Ent. 2me ser. X, 297. 



Upper side violet blue. Under side ashy-white ; that of the 

 primaries with a small discoidal cellule and a sinuous line of ocel- 

 late black points ; that of the secondaries with white spots not 

 ocellate. Female brown, with the base more or less bluish. 



San Francisco. 



18. P. heteronea Boisd. Ann. Soc. Ent. 2me ser. X, 297. 



Upper side violet blue, with a small blackish edge, white fringe, 

 and very prominent nerves. 



Under side ashy-white ; that of the primaries with a point and 

 central lunule black, followed by two parallel sinuous lines of black 

 points. 



Under side of secondaries with two parallel rows of small obso- 

 lete spots, whitish-gray, little distinct from the ground color. 



Upper side of the female brown, with the disk more or less 

 fulvous, pointed with black, and traversed by a sinuous line of 

 large black points. Under side like that of the male. 



Mountains of Northern California. 



19. P. enoptes Boisd. Ann. Soc. Ent. 2me ser. X, 298. 



Upper side violet blue, with a rather wide black border ; the 

 fringe intersected with white and black on the primaries only, 

 entirely whitish on the secondaries. 



Under side ashy-white, with a great number of black ocellate 

 points ; the two striae of posterior points are separated on the 

 secondaries by a series of five yellow lunules. 



California. 



Boisd. 



20. P. piasus Boisd. Ann. Soc. Ent. 2me ser, X, 299. 



Upper side blue, fringe whitish ; that of the female with a blackish 

 border on all the wings. 



Under side of both\sexes ashy-white, with a multitude of black 

 ocellate points disposed as in the analogous species. Those of the 

 posterior row are followed by one of clear white, which forms a 

 transverse band, and occupies the whole space between it and the 

 crescents of the extremity, which are nearly effaced, and resting 



