18 LEPIDOPTERA OF NORTH AMERICA. 



Under side of secondaries white, with the nerves widely edged 

 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 Eversm. 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. 



EVERSMANN. 



P. autodice Hiibn. Samml. Exot. 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 the 

 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. 



