706 THE BUTTP:RFLIES of new ENGLAND. 



forward at the sides, broadly and not greatlj' protuberant in tlie middle beneath, of 

 about the breadth of the eyes, broader than high, the middle of the upper border pro- 

 jecting backward midway between the antennae, where it is separated from the vertex 

 by a straight transverse line ; the loAver border rather abrupt, straight, the sides 

 sloping a little to meet it. Vertex a little tumid, hollowed behind the antennae, pro- 

 jecting forward to meet the front, otherwise transverse, much broader than long; 

 posterior edge slightly convex ; upper border of the eye inconspicuously angulated 

 opposite the middle of the vertex. Eyes large, full, smooth. Antennae inserted in 

 the middle of the head, separated by nearly their oavu width and crowded close upon 

 the border of the eye; scarcely as long as the abdomen, composed of forty-three or 

 forty-four joints, the last ten or eleven forming a club, which slowly increases in 

 size to nearly double the thickness of the stalk and in the last three joints tapers to a 

 very bluntly rounded point ; transversely circular, the club slightly depressed, the 

 whole antenna, excepting near the base, delicately carinate along the under inner 

 edge. Palpi stout, fully half as long again as the eye, the terminal more than one- 

 third as long as the middle joint, profusely tufted beneath with short, rather coarse 

 hairs, spreading a little beneath. 



Prothoracic lobes not large but very full, globose, twice as broad as long or high, 

 broadly rounded at either end. Patagia rather large, very l:)road, almost flat, the pos- 

 terior lobe curved considerably, not twice as long as broad, scarcely diminishing in 

 size, the tip broadly rounded. 



Fore wings (38:2) very long and rather slender, greatly prolonged at the apex, so 

 as to be about twice as long as broad, and presenting a somewhat triangular outline, 

 of which the costal border is the broad base, and the other two margins the equal 

 sides; costal border very broadly and regularly bowed, nearly straight for flve-sixths 

 its length, at the tip curved a little downward, forming, with the slightly and broadly 

 sinuate outer margin, a well-rounded apex; the two halves of the outer border nearly 

 straight and bent a very little ; the inner l^order nearlj' straight, a little protuberant 

 near the base, with the lower outer angle rounded. Second superior subcostal nerv- 

 ale orighiating directly opposite that of the first inferior branch; cell somewhat more 

 than half as long as the wing (largest in the female), and almost four times as long 

 as broad; first median nervule arising a little beyond the middle of the cell, the second 

 midway between the origin of the first and the tip of the cell ; internal nervure very 

 minute. 



Hind wings well rounded; the costal border suddenly and considerably protuberant 

 at the very base, beyond, very broadly and regularly bowed ; the outer l)order roundly 

 arched above, without any angle at its union with the costal border, its loAver half 

 nearly straight, broadly bowed ; the inner margin suddenly and greatly protuberant at 

 the very base, forming rather more than a right angle with the part beyond, which is 

 straight, or, next the base, scarcely incurved, the outer angle rounded; inner margin a 

 little depressed to form a gutter, within a line from the base to the lower outer angle. 

 In the male there is near the middle of the inner border of the lowest median nervule 

 (which is sometimes deflected in its course to accommodate it) a pouch or pocket of 

 membrane heavily clothed with scales (44:2,3), open on the upper surface of the 

 wing away from the nervule, and containing androconia of two patterns, one rod-like, 

 the other spatulate and even-edged. 



Fore legs small, cylindrical, hairless, the tibiae about half the length of the hind 

 tibiae, or, in the female, slightly longer ; fore tarsi less than half the length of the 

 tibiae (J), or about two-thirds their length (?), either consisting of an apparently 

 undivided, unarmed, uniform, cylindrical joint, tapering rapidly at the very tip to a 

 blunt, conical apex (<^); or, taken together, are strongly compressed, expanding 

 apically, the apex broadly rounded, and consisting of three joints, the outer two 

 equal, the basal occupying three-fourths of the whole tarsus, each joint furnished 

 at the extreme tip of the under surface with a pair of approximate, short, slender, 

 equal, parallel spines, the last pair being exactly apical ($)• Middle tibiae slightly 

 longer than hind tibiae; tibiae furnished on the inner side of the upper surface 



