196 THE BUTTERFLIES OF NEW ENGLAND. 



Caterpillar. First stage (70 : 1) : Head (78 : 9) light yelloAvisli brown, the sutures 

 marked -with brown and the summit tubercles brownish ; there are a few short, curving 

 hairs scattered irregularly, amoug which may be specitied one on the summit of each 

 tubercle and lateral wart, and a very long, tapering one, directed forward, springing 

 from the anterior Ijase of the summit tubercles ; ocelli black ; mouth parts coucolorous 

 with tlie head, the mandible tips reddish. Body very pale, uniform, greenish yellow, 

 almost white ; when it is full groAvn at this stage, liowever, it is pale green with the 

 same longitudinal lines as in the next stage; a very faint, pale, stigmatal line, the 

 body below it, and the legs and prolegs paler; first thoracic segment witli a transverse 

 row of little papillae of the color of the body, bearing bristles, directed slightly for- 

 ward; bristles of the body pellucid. Length of body, 3.2 mm.; breadth of body 

 anteriorly, .44 mm. ; posteriorly, .36 mm; of head, .7 mm. ; length of the bristles of 

 the first tlioracic segment, .12 mm.; of ordinary bristles, .06 mm.; breadth of same, 

 .007 mm. ; length of terminal hairs, .24 mm. 



Second stage. Head (78 : 10) pale green, the horns pale yellowish brown at tip and 

 connected with the anterior row of ocelli by a brownish line ; posteriorly the horns 

 have a pale streak, and between each streak and the ocelli the cheeks are dotted with 

 white upon the raised points ; ocelli blackisli in a brown field ; mouth parts greenish, 

 the jaws tipped with reddish brown. Body uniform grass green, clothed with very 

 short, delicate pile, aud striped Avith narrow, longitudinal streaks of white, viz. : a 

 subdorsal line, a distinct laterodorsal stripe, connecting the bases of the conical horns 

 at either end of the caterpillar, faint lateral, suprastigmatal and infrastigmatal lines ; 

 terminal horns pale green, tinged apically with yellowish brown; spii*acles pale, 

 bordered with luteous; legs green, yellowish brown at tip; prolegs green. Length, 

 9.5 mm. ; Ijreadth, 1.25 mm. ; length of cephalic horns, .3 mm. ; of abdominal pair, 

 .2 mm. 



Tliird stage. Head grass green, the projecting part of tlie horns pale yellowish brown 

 tipped with black ; otherwise as in previous stage. Body as in preceding stage, except- 

 ing that the lower longitudinal lines are all distinct, and that between the subdorsal 

 line and laterodorsal stripe, the space is filled on the abdominal segments with a fainter, 

 irregular, white stripe, scarcely separated by a green thread from the bands on either 

 side of it ; and by the presence of a similarly faint or even scarcely perceptible dorsal 

 thread ; the terminal horns are white. Length, 13 mm. including both pair of horns ; 

 breadth, 1.25 mm. ; length of cephalic horns, .6 mm. ; of terminal horns, .6 mm. 



Fourth stage. As in preceding stage, excepting that the projecting parts of the 

 cephalic horns are roseate, as are also the tips of the caudal ones. Length including 

 horns extended, 16mm.; breadth, 1.4; length of cephalic horns, 1.1 mm.; of caudal, 

 1.25. 



Last stage (74 : 9). Head (78 : 11 ; 86 : 19) yellow green, the coronal tubercles red, 

 with a brown stripe on either side of the front from near the tip of the tubercle to the 

 ocelli. Body green, striped longitudinally as follows: a dorsal dark green stripe; 

 subdorsal pale green bauds, edged outwardly witli yellow green; pale green lateral 

 bands through which runs a yellow line ; an infrastigmatal yellow stripe. Legs and 

 prolegs pale green. Lengtli, 30 mm. (After Edwards, my own description being 

 lost.) 



Chrysalis (83 : 9). Green, with a dorsal stripe, and on the abdomen a laterodorsal 

 and lateral stripe of bufi"; the carinate edges of the head case and the alar carinae also 

 bufi". Length, 15.5 mm. ; breadth, 3 mm. (After Edwards.) 



Distribution (18: 6). This is a northern butterfly ; it has been taken 

 as far south as Long Island (Graef), Staten Island (Davis), and New- 

 Jersey (Edwards), and is stated by Kirtland to be excessively abundant 

 in central Ohio and especially in the western prairies, although rare in the 

 northern part of the state, in which last statement Kirkpatrick agrees ; 

 westward we have seen it from Michigan (Mus. Mich. Univ.) and central 



