18 LEPIDOPTERA OF NORTH AMERICA. 



Under side of secondaries white, witli the nerves widely edj^ed 

 with greenish brown, dilated towards the marginal edge, and 

 nearly united between this edge and the cellule by a transverse 

 ray ; obsolete, more or less interrupted. 



California — rare. 



BOISD. 



P. leucodice Ecersm. Figured in Bulletin, Moscow, XVI, pi. 7; f. 2. 



Wings on both sides white ; nerves black ; primaries on both 

 sides, with the usual median spot, occupying the transverse nervure 

 and external fascia, black ; secondaries below, with the external 

 fascia, blackish. 



Northwestern America. 



EVERSMANJT. 



P. autodice Iliibn. Samral. Esot. Boisd. Spec. Gen. 539. 



Upper side of the male white ; primaries, with some marginal 

 triangular blackish marks at the summit, preceded by a macular 

 transverse ray of the same color ; a black oblong spot in the form 

 of a transverse ray on the extremity of the discoidal cellule. 



Upper side of female white, a little yellowish, with a marginal 

 row of black triangular marks on the four wings, nearly touching, 

 preceded by a sinuous row of sagittate spots, of which the con- 

 cavity is turned inwards ; the black spot of the discoidal cellule 

 of the primaries is large, quadrangular, and a little prolonged on 

 the upper edge. 



Under side of the primaries differs from the upper in having tlio 

 discoidal spot cut by a white vein ; in having the summit of a pale 

 yellow, with the marginal marks less distinct, paler, and each one 

 divided by a whitish gray nervure. 



Under side of secondaries pale yellow in both sexes, with the 

 nervures whitish gray, slightly edged with blackish, a little dilated 

 on the posterior edge ; a transverse ray of six sagittate spots, 

 blackish, corresponding to those on the upper side of the female; 

 the upper edge, and two points at the base, saffron yellow ; a vein 

 of the same color, but paler in the discoidal cellule, and another 

 not far from the abdominal edge, a little mingled; a small white 

 space on the extremity of the discoidal cellule, and a small black- 

 ish, oblong spot, pupilled with whitish, situated between the costal 

 and subcostal nervure. 



