612 THE BUTTERFLIES OF NEW ENGLAND. 



half of the sides aud are there connected with those beside tliem by transverse ridges, 

 or are abruptly united with a neighbor to form a single rib ; space between them 

 divided by delicate, but rather prominent, raised lines .047 mm. apart, forming oblong 

 cells, the floors of which are covered with minute, circular and oval, shallow punctula- 

 tions, occupying less than half of the surface, the largest of them .00-12 mm. in 

 longer diameter. Micropyle rosette (67 : 17) .0G8 mm. in diameter, nearly circular, 

 composed of a number of lenticules, increasing slightly in size from the centre out- 

 ward, laid regularly over one another like roortng tiles, the largest .015 mm. in diame- 

 ter. Color of egg pale yellowish, changing afterward to pale fuscous, and just 

 before hatching to dirty yellowish below, fuscous above. Height, .96 mm. ; greatest 

 breadth, .G mm. ; breadth at summit, .22 mm. * 



Caterpillar. First stage. Head shining piceous or blackish castaneous toward the 

 mouth parts, the latter tinged with olivaceous; ocelli black. Body pale dusky green, 

 banded where the Avarts occur with obscure ferruginous ; bristles blackish; legs and 

 prolegs pale green. Length, 2.25 mm. ; breadth of body, AC, mm. ; length of hairs on 

 body, .3-1 mm. 



It difl'ers from the same stage of B. mijrina in having the spicules of the hairs much 

 stouter and more conspicuous, and the expanded apex slightly larger. 



Second stage. Head shining piceous, covered with a few, pale, sti'aight hairs, of 

 variable length; antennae pale, marked with fuscous; labrum pale; mandibles black- 

 ish. Body dark purplish olivaceous marked with obscure dull, pale greenish streaks, 

 forming a dorsal V on each segment, a broken lateral line and an inf i-astigniatal one ; 

 tubercles black, with numerous, pretty long, straiglit, lateral needles and a slightly 

 longer one at tip. Length, 5 mm. ; breadth, 1 mm. 



Third stage. Head (79 : 10) smooth, shining, dark metallic green, covered with a 

 feAv scattered blackish hairs of variable length. Body purplish black, on the sides 

 dotted and most delicately streaked with very pale purplish ; at the outer base of 

 each laterodorsal tubercle is a pale yellowish white, longitudinal streak, forming a 

 bi'oken lateral line ; tubercles shining metallic purplish black, bountifully beset with 

 straight black thorns ; tubercles of the first thoracic segment barely if any longer 

 than the others. Spiracles black, set in a pale purplish spot; legs black. Length, 13 

 mm.; breadth of body, 2.5 mm.; of head, 1.2 mm.; length of spines, .5 mm. It 

 difl'ers but little from the previous stage. 



Fourth and fifth stages. (75 : 1, 5 ; 79 : 11). Difl'ers again but sliglitly from the third 

 stage, excepting in the tubercles, and in the presence of a lateral broken , velvety black 

 band. The tubercles have become pale, dull luteous, the apical half or third blackish 

 fuscous, and the needles fuscous ; those of the thoracic joints are slightly longer than 

 the abdominal ones, especially the anterior pair in the laterodorsal row, although even 

 here the difl'erence scarcely admits of measurement. Length when full grown, 21 

 mm. ; breadth of body, 3.25 mm. ; of head 2.1 mm. ; length of spines, 1 mm. 



Chrysalis (84 : 10,11). Dark yellowish brown, made up of fuscous brown streaks 

 on a yellowish brown ground. Ocellar prominences separated by a wider space than 

 in myrina, marked. above with brownish fuscous; front of head tinged wuth very pale 

 blue; wings tinged with a cupreo-olivaceous hue, having a blackish mesial dash, and 

 some of the veins narrowly marked with black; hinder edge of wings at base, and 

 basal Aving tubercles blackish fuscous; on the abdomen a slender, obscure, blackish 

 line passes through the spiracles, followed beneath by a broad, obscure, silvery white 

 band ; an equally broad ventral baud, conspicuous only by its blackish outer borders; 

 between it and the substigmatal band are two equal bands, the upper similar to the 

 ventral baud, the lower, an obscure white band; laterodorsal tubercles constricted 

 beyond the middle, the apical portion nearly equal, bluntly rounded at tip; those of 

 the first abdominal segment of the same size as those on the adjoining segments; 

 those of the thoracic and first and second abdominal segments mercurial, tipped with 

 yelloAvish broAvn; the others reddish broAvn, each of those on the fifth to the seventh 

 segments connected with its mate by a bent A-shaped dusky band, edged posteriorly 

 with pale, the apex reaching the middle of the anterior edge of the segment ; dorsal 



