540 THE BUTTERFLIES OF NEW ENGLAND. 



the interspaces is lilled at the base Avitli a very large silvery space, each occupying the 

 place normally belonging to the spots of the two basal rows, together with the inter- 

 vening area, the black edging being obliterated ; the whole cell is filled with silver, 

 and the spot of the submedio-internal interspace is extended to the base; beyond the 

 middle of the wing, the Ijlack basal and apical bordering of the silvery spots is 

 i-etained, excepting the apical bordering of the marginal row, but the spots them- 

 selves are absent, being supplanted by a new set of roundish spots, bordered within 

 by the normal exterior border of the inner row, and without by the interior border of 

 the outer roAv. 



Secondary sexual peculiarities. Besides the striking differences between the 

 vsexcs in the markings of the upper surface of both wings, fully detailed in the de- 

 scription above, the lower median and submedian veins of the fore wings have a thick- 

 ened appearance in the middle of their course in the male, due to the presence (44 : 4) 

 of dark scales of unusual size, which here conceal the androconia (46: 11) which lie 

 along the upper surface of the vein, mingled with ordinary scales; these have been 

 described under the genus. 



Egg (64: 34). Sixteen to eighteen longitudinal ribs, at broadest, .OGo mm. apart; 

 surface between them covered with minute circular punctulations, about .004 mm. in 

 diameter, distributed pretty regularly over the surface, their centres about .006 mm. 

 apart; the cross lines are finer compressed ridges, nearly as high as the ribs, .07 mm. 

 apart ; where they traverse the ribs they become indistinct ; on the summit the ribs 

 and cross lines form a pretty uniform subquadrangular pitting, which obtains as far 

 as the micropyle (67: 19) which is .1 mm. in diameter; the central circle of this is. 0085 

 mm. in diameter, and the kite-shaped cells of the first row adjoining it are seven in 

 number, and those of the outer row the same; color when fresh laid, pale green, 

 changing subsequently to shining purplish fuscous. Height, .8 mm. ; breadth at 

 base, .75 mm. ; at summit, .33 mm. 



Caterpillar. First stage (72: 10). Head (79: 2) piceous, with a few long, pale 

 broAvu, tapering hairs. Body dark olive luteous, the incisures paler, the papillae 

 darker and the hairs pale brown ; the latter are shorter than the width of the body, 

 and delicately and distantly spiculiferous. Length of hairs, .34 mm. ; length of body, 

 2 mm. ; breadth of head, 3 mm. 



Second stay e. Head black. Body cinereous, mottled and striped with brown; a 

 macular stripe follows the laterodorsal rows of spines, and another lateral row is inde- 

 pendent; spines black, with short black spiracles. Length, 3.8 mm. (after Edwards). 

 Third stage. Head black. Body mottled and striped with light and dark cinereous ; 

 spines longer than before, black, dull yellow at base. Length, 7.6 mm. (after 

 Edwards) . 



Fourth stage. Head light brown. Body with more contrasted colors, the dark por- 

 tions quite black, the light of a dirty white; a white dorsal stripe, "through which 

 runs a black line ; at the junction of the several segments a transverse white stripe, 

 on which are short black lines ; each segment crossed longitudinally by black stripes, 

 interrupted by the spines, Avith a Avedge-shaped mark betAveen the spines; these are 

 long, shining black, Avith black bristles, and mostly arise from pale orange tubercles." 

 Length, 18 mm. (EdAvards). 



Fifth stage. Body Avitli the ground color buft', the markings nearly as before; a 

 broad buft" band covers the middle of dorsum, enclosing a macular black line; the 

 spines and bases of the spinules mostly orange. Length, 25 mm. (after EdAvards). 



Last stage (75: 10). Head reddish ferruginous on upper half, black beloAv, some- 

 Avhat pilose. Body velvet black, banded and striped Avith ochrey-yellow, changing to 

 dull orange or red, olive brovv'u beneath; a broad dorsal band enclosing a sometimes 

 obsolete black line ; a series of short laterodorsal yelloAv stripes ; a darker stigmatal 

 band; at the incisures tliree narroAv, transverse stripes above the stigmatal band; 

 the last segment yelloAv. Laterodorsal spines silvery Avhite Avith black tips ; the 

 other spines yelloAvish, those of the loAver roAv orange at base and half Avay to tip; of 

 the upper roAv part are orange at base; all the spinules black. Legs black; prolegs 



