PIERINAE: EURYMUS EURYTHEME. 



1129 



mudian iierviiU' yollow, ill Iciist beyoiul the base, and yellow ai)ically even above this. 

 Hind wings with the costal odi;es pink; at the tip of the cell, next tlie lowest snb- 

 costal nerviile, a small, circular or nearly circular silver spot, its diameter about 

 cquallinj; tlie distance between the l)ases of the middle and upper median nervules, 

 edged narrowly and equally with dusliy ferruginous, in wliich are scattered a few 

 blackish .scales, and this by a broader annulus, nearly as broad as the diameter of the 

 central spot, of dull, dirty orange, In which, and especially at the outer limits of 

 which, are scattered many fuscous scales; just above this, at the base of the lower 

 subcostal interspace, is a miniature spot of the same character when fullest devel- 

 oped, but often reduced to a spot like the outer annulus, either with or without a dark 

 pupil: it usually rests upon the summit of the larger dot, but occasionally it is 

 wholly absent ; parallel to the outer border, in all the interspaces opening upon it, and 

 removed from it an eiiual distance to the similar series of the fore wings, is a curving 

 row of rather small, vaguely defined, equal, dusky spots, having usually a ferruginous 

 tinge, not infrequently reduced to mere points; in continuation wMth their curve and 

 depending from the costal margin there is a narrow, transverse, dusky or ferruginous, 

 sometimes pinkish bar, reaching to the upper subcostal uervule. Fringe rather pale 

 pink, tipped with yellow on the upper half of the wiug, more extensively as the cos- 

 tal margin is approached. 



.Vbtlomen blackish, covered profusely above with yellow scales, and towani the 

 base with yellow hairs, on the sides with greenish yellow scales, and beneath with 

 pale, greenish yellow scales and hairs. In the male the hook of the eighth segment 

 (35 ; G) is scarcely half the length of the remainder of the segment, curved strongly 

 and almost bent in the middle, equal on the basal two-thirds, beyond tapering regu- 

 larly to a point. Hook of upper organ similar to that of E. philodice. Clasps very 

 closely resembling those of E. philodice, but not so strongly excised, the upper ex- 



Described from 10 ,J , 8 9 . 



Dimorphic forms. As only the form E. e. amjyhidusa has been recognized in the 

 east, the above description is based on that only ; for the others see the descriptions 

 and illustrations by Edwards. The pallid form of this type may be distinguished thus : 



E. E. AMrniDUS.i ALB.v. The yellow and orange of the upper surface (excepting 

 the central spot of the hind wings) is replaced by a nearly uniform, sordid white, 

 tinged faintly with greenish, and upon which the griseous flecking is much more con- 

 spicuous ; the same color is present upon the under surface of the fore wings, except- 

 ing toward the apex, which is rather broadly washed with pale canary yellow, a color 

 which suft'uses also the whole under surface of the hind wings, dulled by the admix- 

 ture of griseous scales, thus difl'ering scarcely at all from the normal type. 



Egg (65 : 22). With eighteen to twenty distinct, but very slightly raised and 

 equal, vertical ribs, distant .05 mm. apart at the middle of the egg, the surface between 

 them delicately vermiculate, with long oval impressions, often twice as long as broad, 

 running vertically, and more or less confluent at their ends, and also broken by 

 straight cross lines at an average distance apart of .02 mm., with quadrangular 

 cells. Size and color of the egg of E. philodice. 



Caterpillar. First stage. Head brownish piceous, the hairs pellucid. Body dull 

 olive green, nnicolorous, or the anterior third of the body slightly more dusky than 

 the rest; raised points profusely and regularly distributed, and fuscous or blackish, 

 yet so small as not much to affect the body color; papillae faintly pallid, fuscous 



142 



