1306 THE BUTTERFLIES OF NEW ENGLAND. 



Protlioracic lobes obsolete. Patagia rather siu.all, long anj tapering, a very little 

 arched, scarcely tnniid, more than three times as long as broad, very slightly falciform, 

 the basal half tapering a little, the apical half forming an equal posterior lobe, half as 

 broad as the base, with a blunt conical apex. 



Fore wings (40; 3) twice as long as broad, slightly shorter in tlic <y , the costal mar- 

 gin as in Papilio, the outer margin str.aight or scarcely concave, having a general 

 direction at a little less tlian a right angle with tlie apical portion of the costal border, 

 the apical angle rounded otf; inner margin r-traight, scarcely and rather broadly emar- 

 ginate at the middle, the angle rounded otf. First superior subcostal nervule arising 

 just before the middle of the outer half of the cell ; second midway between this and 

 the apex of the cell ; third at the apex ; and fourth at a little more than one-third 

 the distance from the apex of the cell to the outer border ; cell a good deal more 

 than half as long as the wing and more than three times longer than broad. Median 

 nervure at the origin of its fourth branch raised above the continuation of its basal half 

 by rather more than the width of tlie last median interspace at its base; cross vein 

 connecting the median and suljmedian near the base of the wing directed straight down- 

 ward until close to the latter and tlicn turned outward. 



Hind wings with the costal margin considerably and roundly shouldered next the 

 base, beyond a little convex, apically curving to meet the outer margin so as to leave 

 no angle; outer border strongly crenulate, greatly produced in the posterior half, the 

 upper half broadly rounded, fuller at the angle in the ? than in the ^ , forming with 

 the apical half of the costal margin a well-formed arch; at the upper median nervule 

 greatly prolonged into a long, subspatulate tail, well rounded at tip, three or four times 

 longer than broad, its plane, in nature, at right angles to the plane of the wing ; below, 

 the border nearly at right angles to the nervures though stronglj' crenulate In the 

 9 , receding a little in the J , the emargination of the angle and the inner margin as in 

 Papilio. Subcostal nervure nearly straight Ijetween the bases of the first and second 

 nervules ; vein closing the cell a little longer tlian tlie distance between the bases of 

 the second and third median nervules. 



It is plain on comparing a chrysalis just about to emerge, with an imago, that the 

 whole outer margin of the fore wings corresponds exactly in position with that portion 

 of the hind wings which lies between, and includes, the tail and the anal angle; the 

 veins of the hind wings .above this all terminate on the inner margin of the wing cases. 



Fore femora and tarsi of equal length and more than half as long again as the fore 

 tibiae; middle tibiae either a very little shorter than the femora and these than the 

 tarsi ( (? ) ; or, considerably shorter than the femora which are equal to the tarsi ( $ ) ; 

 hind femora a little shorter than the tibiae, the latter about three-quarters the length 

 of the tarsi ; middle femora a little longer than the fore femora and these than the 

 hind pair; middle and hind tibiae about equal and fully half as long again as the fore 

 tibiae; hind tarsi somewhat longer than the middle pair and these about as much 

 longer than the fore tarsi. Femora with a very short brush-like mass of delicate hairs 

 beneath. Tibiae armed on either side beneath with a row of rather frequent and very 

 slender, scarcely curving spines, that on the outer side forking in the middle of the 

 tibiae and sending a branch to either side of the outer spur; also on the outer side, 

 above, a double row of similar but rather shorter spines, and on the inner side, above, 

 a double row of still smaller, nearly recumbent spines ; at the tip a pair of very long and 

 very slender spurs. Tarsi with the first joint as long as the three succeeding together, 

 these growing scarcely shorter in succession, the fifth equal to the second; all armed 

 beneath, on either side, with a row of frequent, very short and very slender spines, the 

 apical ones of each joint about twice as long as the others; and on the basal joint, in 

 the inner row only, five or six nearly equidistant curving spines nearly three times as 

 long; above, four nearly equidistant rows of spines similar to the lower ones; claws 

 very long and very slender, compressed, the basal half equal and straight, the apical 

 half tapering to a fine point and curving slightly downward ; paronychia and pulvilli 

 wanting. 



Abdomen cylindrical but flattened beneath, of nearly \mlform size throughout, bluntly 



