J 208 THE BUTTERFLIES OF NEW ENGLAND. 



iv : 104) : — "The spring spcchneiis are of a very il(dic-ate yellow, almost without spots, 

 and are very handsome, while those appearing in the fall are of a sulphur yellow and 

 heavily marked." 



Accessory sexual peculiarities. The amlroconia (46 : 40) differ from those of 

 1'. oleracea in the far more slender distal half which is not a fourth the diameter of 

 the broadest part of the lamina, produced, and lience with more crowded and fewer fila- 

 ments to the fringe ; these too are scarcely enlarged at the tip ; the basal lobes hardly 

 approacli each other to clasp the pedicel, so that the sides of the gap between them are 

 nearly equal instead of forming a jiartially enclosed rounded space, as in P. oleracea. 



Egg (65: 28). Sugar loaf shaped ; largest at about the middle of the upper two- 

 thirds, tapering gently beneath to the docked base and much more rapidly above to 

 the summit, where it terminates in a flattened top ; there are twelve longitudinal ribs 

 .1 mm. apart at the widest; transverse lines ou the broadest part of the egg from .025 

 to .028 mm. apart; surface smooth, glistening, delicate. Micropyle rosette (68: IG, 17) 

 .070 ram. in diameter, the central circle .00(58 mm. in diameter, the oval cells .017 mm. 

 long and .0115 mm. broad, the outermost largest ; transverse cells about .04 mm. broad. 

 Color pale lemon yellow deepest in color above with a slight greenish tinge, changing 

 subsequently to a lemon yellow. Ileiglit, .98 mm. : greatest breadth, .4G mm. ; breadth 

 at base, .:3(i ram. ; at summit, .09 mm. 



Caterpillar. Mrst stage (72 : 4). Head pale greenish yellow coveretl with a very 

 few dark brown or black slightly curving hairs, of variable length but some nearly as 

 long as those of the body ; ocelli black ; mouth parts and antennae pale. Body very pale 

 greenish yellow ; as soon as they have eaten they become green ; hairs of body (86 : 43) 

 a little arcuate, wholly pellucid, the ovate club of the upper rows larger than that of 

 the others, seatetl on white warts; stigmata of the color of the body with a luteous 

 anuulns ; legs and prolegs of the color of the body, claws of the Utter dusky. Length, 

 1.6 mm. ; breadth in middle, .28 mm. ; behind, .25 rara. ; of head, .3G mm. ; length of 

 clubbed hairs, .17 mm. ; of simple hairs, .27 rara. ; of hairs on head, either .04 rara. or 

 .12 mm. ; breadth of club of laterodorsal hairs. .021 mm. ; of lateral hairs, .017 mm. ; 

 of wart at base of hairs, .025 mm. 



Second stage. Head and body pale green, the latter with a slender, yellowish, dorsal 

 stripe. Head with mingled black and white hairs springing from minute warts of 

 same color; ocelli black; mouth parts and antennae green ; labruni pale; maudibles 

 edged with fuscous. Abdominal segments with white warts arranged in a subdorsal 

 strongly anterior, infralateral medio-anterior, and supralateral posterior rows, giving 

 rise to blacli, straight not tapei'ing, blunt tipped hairs ; besides which the whole body is 

 sprinkled with greenish fuscous warts from wdiich spring shorter black or moderately 

 long, tapering and delicately clnbbed, pale hairs, the warts arranged in seven transverse 

 row,s on each segment, the anterior and posterior pairs of each segment closer together 

 than the others. There is also a substigmatal anterior white wart giving rise to a pale 

 hair. Spiracles luteous with a black ring. Legs and prolegs together with the claws 

 of the body-color. Length, 9 mm. ; breadth, 1.5 mm. 



Third stage. Exactly the same as in preceding stage, except in size and that one or 

 two small spots of yellow appear for the first time on each segment along the stig- 

 matal line. Length, 14 mm. ; breadth, 2.5 ram. 



Last stage (76: 11, 12). Head (79: 5.S) of the body color profusely supplied with 

 hair-bearing warts some of which are white ; ocelli black, sometimes tipped with green ; 

 mandibles green, reddish brown at tip. Body of the green of a cabbage leaf, with a 

 uai-row, greenish, lemon yellow, dorsal band; a narrow, interrupted, stigmatal band 

 of the same color; the whole body profusely dotted with larger and smaller wartlets, 

 giving rise to very delicate, rather short, white or fuscous hairs, the larger ones ar- 

 ranged in transverse rows, also supplied with white wartlets each giving rise to a 

 blackisli hair, arranged in longitudinal rows one to each segment in a row, viz. : a sub- 

 dorsal row on the anterior part of the segments, a lateral, placed posteriorly, and 

 a suprastigmatal, placed centrally. Spiracles pale fuscous, edged with black. Legs 

 green, the claws fuscous. Prolegs (86: 31) green. Length, 20 mm.: breadth, 4.5 

 mm. 



