NYMrilAJ.INAE : POLYGONIA PROGNE. 



365 



wardly by an arcuate series of small, l)lack dots in the interspaces, those in the upper 

 third of the wing most distinct and largest, that in the apical subcostal interspace in 

 the middle of its basal two-tiiirds and that of tlie upper median in its centre. Fringe 

 much as above. Hind loiiujs with similar tints to those of the fore wings, but the basal 

 and apical halves not so distinctly separated, the whole wing covered with transverse 

 thi-eads of black and ])lackish brown, on the basal half of the wing collected to a 

 considerable extent into slender streaks, all upon a sordid white ground, which on the 

 basal half is tinged with dull, dingy pale greenish; the line of demarcation between 

 the two passes from the middle of the outer four-fifths of the costal border in a 

 sinuous course, to the middle of the basal half of the middle subcostal nervule ; it 

 starts again from a little beyond the base of the upper median nervule and passes 

 with a tremulous course, faintly impressed, toward the base of the excision of the inner 

 bonier of the wing; the apex of tlie cell is marked by a plain, equal or nearly equal, 

 silver line, which does not attain the subcostal nervure and which, on reaching the 

 median nervure at its last divarication, follows the upper median nervule to a distance 

 nearly equal to the transverse portion, and at its tip the darker basal color of the 

 wing terminates ; occasionally the longitudinal limb is nearly obsolete and it usually 

 tapers apically ; it is usually twice as broad as the nervules at this part of the wing ; 

 the outer margin of the wing is scarcely darker than the surrounding parts , though 

 usually a little infuscated, but there is a submarginal, sinuous, slender, ])lack stripe, at 

 the distance of nearly an interspaces' width from the outer border, which is almost 

 entirely tilled up with dull greenish scales ; a short distance within this is a vei-y ob- 

 scure transverse series of black dots in the interspaces, almost wholly obliterated by 

 Ijeing made the centre of a transverse, partially connected series of blackish streaks, 

 hardly as far from the submarginal stripe as that from the outer border. Fringe 

 much as above. 



Abdomen blackish broAvn above covered rather profusely with tawny scales ; be- 

 neath ashy grey with mingled pale, light brown and pale tawny scales. The opening 

 at the extremity in the male is constricted, transverse, rounded, strongly arched above, 

 nearly straight below, half as broad again as high. The upper organ of the male 

 appendages (33 : 13) has the hook as in P. faunus but more strongly arcuate, as long 

 as the body, without basal tooth. Clasps nearly three times as broad as long, the 

 upper hinder angle only slightly produced and rounded , slightly incurved ; basal 

 process of upper surface twice as long as the clasp and slender, the apical half directed 

 backward, equal and scarcely depressed; at the middle bent abruptly inward and 

 downward in a slightly sinuous curve, depressed, tapering regularly to a pointed tip; 

 interior finger long and slender, tapering slightly throughout but more conspicuously 

 toward the base, arcuate, on the apical third finely pointed and scarcely surpassing the 

 upper edge of the clasp. 



POLYGONIA PROGNE C-ARGENTKUM. 



POLYGONLV PRO<iXK J.-ARGEXTEU.Ar. 



Described from 27^speoimens, of which 9 $ 11 9 , 



