1166 THE BUTTERFLIES OF NEW ENGLAND. 



Dimorphic forms. The above description is drawn up entirely from 1'. p. proto- 

 dice. r. p. ■\T.uN.\Li.s differs iu being decidedly smaller, the largest females about the 

 size of the smallest males of P. p. protodice, and in the markings, particularly of the 

 under surface of the hind wings ; these have all the ner vures ir.cre brcodly and usuall 

 more heavily banded with greenish gray, leaving between them only narrow, more or 

 less wedge-sliapcd bars of white Ix'fore a sharply serrate, narrow, blackish gray band 

 in the middle of the outer half of the wing, capping marginal, more or less obscure, 

 tall, whitish lunnles. 



Egg (65:26). Two and a half times liigher than broad, of almost equal width 

 from a little above the base to the middle of the upper half, with about thirteen to fif- 

 teen vertical ribs, all reaching the summit; surface punctulate. Only alcoholic speci- 

 mens seen. Distance apart of vertical ribs, .12 mm. ; of cross lines, .03 mm. 



Caterpillar. First stage. According to French it "is of a uniform orange color, 

 with a black head." 



Last stage (76:7). Head (79 : -1:9) very pale straw-colored, the posterior half 

 faintly tinged with pale purplish ; in the centre of each side a large golden yellow 

 spot ; the whole head is dotted conspicuously with smaller and larger blackish ferru- 

 ginous spots, each encircling the base of a not very long black hair; at the bottom of 

 the triangle four are arranged in a transverse row ; antennae pale, the apical half of 

 the third joint infuscated. Ocelli purplish, broadly annulated with black. Mouth 

 parts pale, the tips of the mandibles blackish. 



Body : the whole upper surface composed of alternating stripes of bright golden 

 yellow and dark greenish purple, sometimes all of equal width, sometimes the darker 

 bands broader than the others ; the yellow colors form laterodorsal and stigniatal bands 

 and tliere is an infrastigmatal band of the purple color. Beneath dull pale greenish 

 with a faint purplish tinge. The whole bodv is abundantlj' sprinkled with larger and 

 smaller black dots, occurring mostly upon the darker ground, each giving rise to 

 a rather short, black hair. Other shorter hairs arise from numerous other minute 

 warts. Spiracles luteous. Legs and prolegs of the color of the under surface, thg 

 claws of the former fuscous. Length of body, 21-24 mm. ; breadth, 3.5 mm. ; breadth 

 of head, 2.25 mm. Described from specimens recently immersed in glycerine. 



Chrysalis (84: (56, 67). Specimens recently preserved in glycerine are yellowish 

 red, but the original hue, according to Riley, is light bluish gray; the color is more 

 delicate on the wings, fainter and suffused with yellowish on the lifth and succeeding 

 abdominal segments. There is a dorsal j'ellowi.sh line, distinct and bright on the 

 thorax, faint and duller on the abdomen; there is also a faint, bi-oad, yellowish (buff 

 or flesh color in life) laterodorsal stripe on the abdomen, and the snpr.astigmatal 

 carinae on the same are distinctly margined with yellow. The body, excepting the 

 appendages, is furnished with scattered, small and not very distinct blackish dots, and 

 with the following larger distinct ones : at the apex of the mesouotal crest ; usually 

 one in the centre and one situated anteriorly on or next to the suprastigmatal carina 

 of the fourth and succeeding abdominal segments ; a ventral and a lateroventral 

 series, one to each segment; and one at the tip of the dorsal surface of the cremas- 

 ter. The wings are supplied with faint, fuscous, dendritic markings, the veins 

 marked with distant, distinct black dots; there is a black spot on the basal tubercle, 

 and the joints of the antennae are frequently marked in the same way. Spiracles con- 

 colorouswith the body. Length of body, 17.5 mm. ; breadth, 4.5 mm. 



Distribution (26 : 4). The Mississippi valley seems to be the metrop- 

 olis of this butterfly, but it occurs from ocean to ocean, and in the east 

 throughout most of the Carolinian and AJleghani4n faunas. In the Rocky 

 Mountain region and on the Pacific coast a form prevails which has been 

 considered I)y some as a distinct species, but we believe has not been found 

 in any region where the type does not also occur. On the Pacific coast 



