IIESPERIDI: llir, GENUS ACIIALARUS. 1413 



about the samo lengtli as the oiitor imii;;in. Costal inaifjiu thickened through most 

 of its bnsal half ; costal nervure terminating but little before the apex of the cell ; the 

 outer but not the inner superior subcostal nervules sinuate at the base, the first aris- 

 ing opposite the second median uervure, almost at the middle of the outer half of the 

 cell ; the fourth at the outer extremity of the cell and running to the tip of the wing ; 

 the second much nearer tlie Mrst than the third, and the latter nearer the fourth than 

 the second ; first inferior subcostal nervule bent strongly at its extreme base, the 

 basal portion sub()l)solete, arising directly opposite the fourth superior subcostal 

 nervule. oblifjuely ; first meilian nervide arising jnst beyond the middle of the basal 

 half of the cell ; the nervure united to the angle of the inferior subcostal nervule by a 

 cross vein, oijsolete excepting at its extremity vehich runs parallel to the outer mar- 

 gin; close to this originates the subobsolete, arcuate, recurrent nervule which runs 

 toward the centre of the cell ; cell about six times as long as broad and a little more 

 than two-thirds the length of the wing; internal vein much as in Eudamus, but nearly 

 lost before reaching the submcdian. 



Hind wings rounded, triangular, scarcely longer than broad; the base of the costal 

 margin witli a strongly arcuate lobe; the margin itself beyond the angulation very 

 gently arcuate; tlie outer nuirgin very full, strongly convex, scarcely crenulate, bent 

 at scarcely more than a light angle with tlie inner margin at the tip of the suijmedian 

 nervure, with a scarcely perceptible, broad, angulate excision at the tip of the lower 

 mediau nervule; inner margin bent with a broad angle at the tip of the internal nerv- 

 ure; costal, precostal and subcostal nervures much as in Epargyreus, but with a 

 broader lacnna at the base and with the costal nervure less strongly arcuate beyond 

 it ; subcostal nervure f orlving at more than one-third the distance to the margin ; no 

 perceptible cross vein closing tlie cell, but the subcostal and median nervures angulated 

 slightly just beyond their last divarication ; first sulimedian nervule arising some dis- 

 tance before the forking of the subcostal. 



Scales enclosed in the costal fold of the male similar in general to those of Thorybes. 



Legs 2, 3, 1 ; all the femora tufted beneath with a compressed fringe of hairs, de- 

 creasing in length from the base toward the apex, those of the hind and middle legs 

 very long at the base ; hind tibiae fringed thinly above. Femora 2, 1, 3 ; tibiae 2, 3, 1 ; 

 tarsi 3, 2, 1 ; fore femora scarcely longer than the hind : middle femora half as long 

 again as the front pair. Fore tibiae a little more than half as long as fore femora; 

 hind tibiae scarcely shorter than the middle pair, scarcely longer than the fore femora. 

 Leaf-like appendage small and slender, originating in the middle of the outer two- 

 thirds of the tibiae, five times as long as broad, straight, tapering toward the tip to a 

 blunt point; middle and hind tibiae with an apical pair of spurs, the hind tibiae with a 

 similar pair in the middle of the apical four-fifths of the joint. Tarsal joints of fore 

 leg 1, 2, 3, 5, 4; of other legs 1, 2, 3, 4, 5; fore tarsi a little less than f Dur-flfths as 

 long as the middle, and two-thirds as long as the hind tarsi ; all with a triple series of 

 slender spines beneath, the apical ones of each joint much longer than the o'hers; 

 basal joint as long as the rest together on the fore and middle legs, a little shorter on 

 the hind legs. Second joint about two-fifths the length of the first. Claws small, 

 very slender, delicately tapering to a fine point, strongly arcuate or bent in the middle; 

 pad pretty large, transverse, paronychia apparently aborted. 



Abdominal appendages of the male having the upper organ scarcely compressed, 

 regularly arched, hooks much as in Eudamus; lateral arms forming a sheath which 

 reaches but little beyond the base of the hooks. Clasps large, broad, a little convex, 

 the upper edge developing an exceedingly large, rounded lobe, directed upward and a 

 little backward, the clasp beneath and tjeyond it forming an arcuate ribbon, with an 

 apical curved spine. 



Egg. Bee-hive shaped, broadly truncate above, largest in middle of basal half, nar- 

 rowing below very rapidly and then very broadly truncate, a fourth broader than high, 

 the sides with delicate, very slightly elevated, distant, vertical ribs, extending from 

 base to summit, and passing slightly over the rim ; interspaces cut by numerous very 

 regular and faint transverse raised lines; summit with a network of broadly trans- 

 verse, large, polygonal cells, becoming abruptly minute on the micropyle rosette. 



