648 THE BUTTERFLIES OF NEW ENGLAND. 



rounded but more fully ia the (^ than iu the ? ; inner border somewhat expanded 

 but not very abruptly next the l^ase, l)3yond straight as far as the tip of the internal 

 nervure, beyond which it is somewhat excised and a little concave, the angle rounded 

 oft*. Precostal nervure forked above, the inner fork very short, the outer directed 

 strongly outward, as long as the main stem. Second subcostal nervule originating 

 but very little beyond the first ; cell open. 



Fore legs short, cylindrical, in the male with but a slight fringe of long, scarcely 

 spreading hairs on the outer side ; tibiae scarcely two-flf ths the length of the hind 

 tibiae; tarsi less than half (^) or fully ($) as long as the tibiae, either with very 

 faint indications of divisions into joints, and especially of one close to the apex, the 

 tip armed with two or three straight spines as long as the width of the joint (cj) ; 

 or, consisting of five joints, the first rather longer than the rest taken together, the 

 second half as long as those beyond taken together, and the others decreasing toward 

 the tip ; all but the last furnished at the apex beneath with a pair of small, but long 

 and slender spines, all but the first of which are immediately followed ou the next 

 joint by several bristle-like spines, which seem to strengthen them; the second, third 

 and fourth joints have also a pair of minute spines in the middle of the lower portion 

 of either side, and the first a subapical lai-ger spine in the middle beneath; the space 

 between the spines naked (5). Middle tibiae slightly shorter than the hind tibiae, 

 furnished on either side of the under surface with a row of not very long but very 

 slender and rather infrequent, somewhat spreading spines, the apical ones developed 

 to rather long and very slender spurs ; also with a row of shorter and less frequent 

 spines on the upper limit of the inner side and a few scattered ones on the outer side. 

 First joint of tarsi nearly as long as the rest together, the second nearly as long as 

 the third and fourth combined, and scarcely longer than the fifth, the fourth shortest, 

 and the third slightly shorter than the fifth ; furnished beneath with four rows of 

 short, slender spines, the spines of the middle rows on the basal half of the first 

 joint alternatins, the apical spines of each joint considerably longer than the others. 

 Claws small, moderately stout, strongly falcate, ending in a fine point; paronychia 

 double, the superior lobe just shorter than the claw, similarly curved, very slender 

 and tapering, on its under edge coai'selj' pectinate; inferior lobe short, broad, stout; 

 inilvillus small, quadrate, transverse, the anterior edge rounded. 



Abdomen slender, the upper organ of the terminal male appendages with the sem- 

 blance of a hook in two united pieces which project slightly downward at the hinder 

 extremity of the centrum. Clasps stout, tumid, of pretty irregular form but sub- 

 quadrate, broadly rounded below, abruptlj'^ rounded above, bearing at the tip two 

 curving spines, one above the other, the lower incurved a little, the upper recurved 

 strongly; besides, arising just within the base of the latter and lying in a horizontal 

 plane, a stouter backward curving spine. 



Egg. Subcylindrical, flat at base, largest in the middle, much higher than broad, 

 narrowing very slightly on apical half, below regularly rounded, above truncate, the 

 upper half with rather frequent vertical ribs which fade out below; the surface is 

 smooth. (See the note under the description of the species C. nycteis, below.) 



Caterpillar at birth. Head rounded, each hemisphere independently arched above. 

 Body cylindrical, the segments somewhat moniliform, each with a transverse row of 

 raised points (the position of Avhich has not been stated) each bearing a microscopi- 

 cally spiculiferous bristle. (From descriptions of Saunders, Edwards and Gruber.) 



Mature caterpillar. Head well rounded, the sides broadly rounded, broadest a 

 little above the middle, the hemispheres slightly tumid at summit, very slightly pro- 

 tuberant externally, the suture between them a little depressed, the front a little 

 appressed, a little deeper beneath than above, covered above and on the sides with 

 distant small wartlets emitting slender, not very long hairs; triangle flat, half as 

 high again as broad, reaching somewhat more than half way up the front ; second joint 

 of antennae nearly as long as broad, the third scarcely slenderer at base and as large 

 at tip as the second, but twice as long as broad, the tip roimded, the fourth joint 

 very minute. Ocelli, six in number, five in rather a broad curve, its convexity forward 



