244 THE BUTTERFLIES OF NEW ENGLAND. 



The above description is drawn np from specimens of C. c. clyton alone, the form 

 pi'oserpina not having .yet been found on the confines of New England. It differs from 

 the other form by an infuscation of the upper surface and particularly of the hind 

 wings. 



Egg (64 : 0, 7) . Pale yellowish white, with the sides almost straight in the middle half, 

 rounding abruptly to the summit so as to be almost shouldered, the summit therefore 

 very broad and only slightly convex. Vertical ribs about twenty in number, rather 

 coarse and rounded, not greatly elevated, the cross lines straight and obscure, forming 

 cells about four times as broad as long in the middle of the egg, the surface within 

 rather coarsely but very shallowly punctate or subrugulose. Micropyle rosette about 

 .15 mm. in diameter, the outer cells subequal with stout walls, growing rapidly 

 smaller within, where they are all oval, those of the innermost row, about a dozen in 

 number, with the longer axis about .015 mm. in length, slenderest at inner end, and 

 all radiating from a central circular cell about .005 mm. in diameter; all the interior 

 cells with far more delicate walls than the outer. Height of egg, .G mm.; breadth, 

 .54 mm. 



Caterpillar. First stage. Head (87 : 7a) piceous, the mouth parts dull castaueous. 

 Body white, the last two segments with the superior projections fuscous ; legs and 

 prolegs white, the last joint of the former faintly fuscous ; hairs pellucid; stigmata 

 apparently concolorous with body. Length, 1.5 mm. 



Second stage. Head (87 : 7b) pale yellowish green, marked with brown specks, the 

 ocelli and mandibles brown. Body pale green, with a slender, dorsal, dark green line, 

 and three pairs of dark green longitudinal stripes, the middle, lateral stripe broadest 

 and most conspicuous ; hairs white; legs and prolegs pale green. Length 3.2 mm. 

 (After Edwards and Riley.) 



Third stage. Head (87 : 7c) and its papillae pale livid green, flecked abundantly and 

 very minutely with brown at the anterior base of the coronal tubercles, the middle of 

 the summit, the ocellar field, the frontal triangle and the mouth parts. Body green with 

 broad, subdorsal, white bands and equal, suprastigmatal and infrastigmatal, white 

 stripes; each of the conical papillae, everywhere profusely scattered over the body, 

 supports a pellucid or white hair twice its own length ; anal protuberances whitish. 

 Legs and prolegs concolorous with the body. Length. 7.G mm. 



Fourth stage. According to Riley this does not difi'er from the preceding except that 

 the head (87 : 7d) becomes greener, the papillae of the body more conspicuous and the 

 medio-dorsal dark stripe proportionally narrower. 



Last stage (74 : 20). Head (87 : 7e) very pale green, with two rather broad, curved, 

 white stripes down the face, passing above to either side of the prominent tubercle; 

 the latter pale lemon green, sometimes marked more or less with black in front; its 

 spinules like the others of the head pale, whitish green; hairs of head white; ocelli 

 and mandibles black ; other mouth parts white. 



Body striped in green, yellow and white in continuous and equal bands from head to 

 tail. A median bluish green line ; next it the whole dorsal surface white, tinged on 

 the interior half witli yellow ; the division of the white and yellowish white marked 

 by a very faint, fine, broken, greenish line, sometimes obsolete; an infralateral, rather 

 broad, dark green band, flecked along the middle Avith confluent white dots; a su- 

 prastigmatal white band of nearly equal widtli tinged slightly Avith yellow; a similar, 

 but light green, stigmatal band with a faint, white line running along the middle; and 

 a substigmatal band wholly like the suprastigmatal ; beneath very pale green ; tuber- 

 cles white Avith white hairs ; stigmata and prolegs very pale green ; caudal horns 

 pale green, but white from the tubercles which completely cover them. Legs pale 

 green tinged Avith yellow. Length of Avhole body, 37 mm. ; Avidtli at first thoracic seg- 

 ment, 3.75 mm. ; at third abdominal segment, G.5 mm. ; at last abdominal segment, 2.6 

 mm. ; length of caudal horns, 2 mm. 



Chrysalis (83 : 15-17). Color above in general pale grass green ; below, very pale pea 

 green, the dividing line between the two being a narroAV, yellow stripe folloAving the 

 posterior edge of the Aving cases to the abdomen, where it forms a less distinct infra- 



