1804 BUTTERFLIES BEYOND NEW ENGLAND. 



each segment; on either side of the first thoracic segment are two minute tubercles 

 ■with hairs, two also on the middle, and thi-ee on the last thoracic segment; between 

 each of the thoracic segments, at the junction of the segments, is set a large spine, 

 which lies between the laterodorsal spine and the next higher spine on each side ; 

 spines long, tapering, black, beset with many short and fine, black bristles ; the spines 

 on infrastigmatal row now rise from yellowish tubercles (but in some examples these 

 spines were green, and rose from greenish tubercles) ; all others from black ones. 

 Length, 3.8 mm. 



Third stage. Head as before, except that on each vertex now appears a small, coni- 

 cal, black process. Shape of body as at previous stage; color black brown, the sides 

 less dark than dorsum ; the tubercles of the laterodorsal spines are pale buff on outer 

 side, but black on dorsal side; the laterostigmatal spines have black tubercles, the 

 infrastigmatal bull"; the intermediate tubercles on anterior segments are yellow ; the 

 laterodorsal spines on the first thoracic segment are somewhat turned forward ; but 

 are no longer than others of same rows. Length, 5.6 mm. 



Fourth stage. Head subcordate, mucli flattened f rontally, and on the summit of each 

 vertex is a small, sharp process as before; many small tuberculations over the face, 

 each of which sends out a black hair; color of front head sliining black, but the back 

 is yellow. Color of body velvety black with a brown tint ; spines much longer and 

 heavier than before; the outer si<le of tubercles of the laterodorsal rows is now dull 

 yellow ; the spines of laterostigmatal row have very little yellow at base, and those 

 of infrastigmatal are yellow at base and a little way up. Length, 7.6 mm. 



Fifth stage. Head as before, much flattened; color black, orange at back. Color of 

 body as at previous stage; spines black, both the laterodorsal and laterostigmatal very 

 slightly colored, reddish yellow at base, scarcely visible except when viewed obliquely ; 

 the infrastigmatal and also the intermediate spines on anterior segments are all orange 

 at base, and about half way up. In some examples the bases of lower spines and the 

 back of the head were reddish yellow in the early part of this stage, but became 

 orange later. Length, 12.7 mm. 



Last stage. At first, the back of the head is a yellow orange. Color of body velvety 

 black ; the laterodorsal spines are drab at base, except those ou the first two thoracic 

 segments which are brownish yellow ; all the spines of the other two rows are of same 

 yellow as base, but the tul^ercles orange. 



When full grown, the head is subcordate, deeply cleft, flattened in front, on each 

 vertex a small, conical process ; over the front many short, black hairs; color black, 

 the back of head reddish yellow, sometimes dull yellow. Body cylindrical, of even 

 thickness from the first to seventh abdominal segments, the segments rounded; color 

 velvety black; spines long, slender, tapering, of about equal length; the long spines 

 on first thoracic segment are directed forward, but are not longer than others ; all the 

 spines are beset with many short, black bristles ; those of the laterodorsal rows are 

 translucent brown at base, except on second and third thoracic segments where they 

 are dull yellow ; all of the others are dull yellow from base (including the tubercles) 

 half way to top ; tops of all spines and all the bristles black ; legs and prolegs brown. 

 Length, 35.6 mm. at rest; 45.7 mm. in motion; breadth at rest, 7.6 mm.; length of 

 laterodorsal spines in middle of body, 3.8 mm.; height of supporting tubercle, .25 

 mm. 



Chrysalis. Shape of S. diana, cylindrical, a little compressed laterally, the wing 

 cases prominent and flaring at the base on ventral side ; the whole surface finely corru- 

 gated; head case square, beveled at the sides, rounded transversely, the outline from 

 top of mesonotum to extremity being arched ; on either vertex a small, conical 

 process; mesonotum carinated, followed by a deep, rounded excavation; on middle of 

 either side of mesonotum a small, conical tubercle; on the abdomen two dorsal rows 

 of similar tubercles and a row of small ones on each side; the color varies somewhat, 

 some examples being red brown, irregularly mottled with black: on the wing cases 

 red brown, and the black is limited mostly to the disks and uervures; others are drab 

 and black, the wing cases finely streaked with black, otherwise drab; ou the abdomen 



