596 THE BUTTERFLIES OF NEW ENGLAND. 



Beneath the change is very great, particnlarly on the hind Avings ; the ground color 

 is, however, normal; on the fore loiiigs there is a repetition of the basal markings of 

 the upper surface (the bar in the middle of the cell tvith a fulvous centre) , but in 

 addition there is a remnant of the mesial band in the medio-submedian interspace ; the 

 extra-mesial row of round spots and dots is nearly normal, only Avanting in the upper 

 subcostal interspaces, excepting that they are encroached upon outside mesially by 

 the strigose extension of the normally submarginal silver spots, which here are run 

 into longitudinal streaks with a tendency to expand premarginally, and are bordered 

 Avitli bufl"; on the hind imngs the suffusion is most interesting and complete ; all the 

 silvery spots are completely run together from base to margin, filling, with various 

 widths, all the interspaces and the cell, leaving between them only the cinnamoneous 

 ground, more or less suffused with bnft" in the basal two-thirds of the wing, and tAVO 

 independent spots Avhich, not being fairly normal to this surface, at least to such an 

 extent, may be looked upon as transfers from above. These are a very narroAv, trans- 

 verse, black bar closing the cell and a central, transverse, oval, black si)Ot in the 

 centre of the cell. Expanse of Avings, 42 mm. 



I have taken tAvo males, one in the White Mountains, the other in Massachusetts, in 

 Avhich there is a partial suffusion of the black markings, one most conspicuously in 

 the middle of the fore Avings above, the other mainly in the outer border of the upper 

 surface of both Avings. In the former, nearly the Avhole of the space included 

 betAveen the mesial stripe and the transverse bar in the outer half of the cell and the 

 V-shaped dash below it, is suffused Avith black; there is a squarish, fulvous spot just 

 beyond the extremity of the cell, making the suffusion less complete than is the paral- 

 lel case cited under B. bellona, and the under surface does not differ from the type; 

 the outer border of the fore Avings is also partially suffused ; but this is more distinct 

 in the other instance mentioned, Avhere the outer border of both Avings has the interior 

 limits obscured by a begriming of mingled fulvous and black scales, increasing its 

 apparent Avidth, and in Avhich the fulvous spots, usually enclosed Avithin the black 

 margin, are obsolete; on the fore Avings the upper round spots in the neighboring 

 series are concealed in the suffusion. 



Secondary sexual distinctions. There are no androconia, but a slight difference 

 betAveen the sexes appears in the point of origin of the second subcostal nervure of the 

 hind Avings. 



Egg (64: 28). Sixteen or seventeen prominent, longitudinal ribs, nearly all reach- 

 ing the summit, .0085 mm. in thickness, .032 mm. in height, and in the middle of the 

 egg .12 mm. apart; the space betAveen them is holloAved Avitli a regular, equal curve, 

 broken up by cross lines .04 mm. apart; the floor of the cells thus formed is profusely 

 covered Avith minute, shalloAV, oval punctures, averaging .0042 mm. in length. Micro- 

 pyle rosette (67 : 18) .13G mm. in diameter, composed of a number of irregular round- 

 ish or angular cells, of nearly uniform size, the largest .025 mm. in diameter. Color of 

 egg pale, dull, slightly olivaceous yelloAV. Height, .93 mm. ; greatest breadth, .00 mm. ; 

 breadth at summit, .27 mm. 



Caterpillar. First stage (72 : 2). Head (79 : 7) shining blackish olivaceous broAvn, 

 the suture of the triangle marked by a delicate black line, covered Avitli infrecinent, long, 

 curving, yelloAvish broAvn hairs ; ocelli black in a black field ; mouth parts and antennae 

 luteous, the jaws reddish at tip. Body pale, dull, nearly uniform olivaceous, a little 

 darker or broAvnish in the middle of the segments (but all turning green after the 

 animal has eaten), dotted profusely Avith excessively minute, circular punctulations, 

 AAdiich do not cover tlie Avarts ; Avarts of the color of the part on Avhich they are seated, 

 tipped Avith black ; the hairs are dull broAvnish in color, those of the sides straight, 

 those of the ui)per surface curved forwards on the anterior end of the body as far as 

 the seventh abdominal segment ; on this and the succeeding they curve backAvard ; the 

 barbs of the hairs are distant from each other on the same side by usually about tAvice 

 the Avidth of the hair, and those of opposite sides are emitted nearly opposite to each 

 other. Legs greenish, fuscous at the tip; prolegs greenisli. Total length, 2 mm.; 

 breadth of body, .44 mm. ; breadth of head, .38 mm. ; length of hairs on head, .22 mm. ; 

 length of hairs on body, .35 mm. 



