1764 THE BUTTERFLIES OF NEW ENGLAND. 



arcuate, scarcely depressed in the middle, about two and one-fourth times broader than 

 long, subquadrate in form, the anterior outer angles rounded off, the front border 

 straight, scarcely excised in the middle; in the centre is a slightly raised, circular, 

 lens-shaped protuberance, apparently an ocellus, although unaccompanied by others, of 

 about the size of the second antennal joint, found only in accius and in the female 

 broken into two or three irregularities; separated from the vertex by a more or less 

 distinctly impressed, straight line connecting the middle of the antennae. Vertex 

 scarcely tumid, uniform, just attaining the height of the eyes, transversely almost 

 flat, separated from the occiput, which is scarcely sulcate longitudinally in the middle, 

 by a slightly impressed line, bent but little in the middle. Eyes large, full, nearly cir- 

 cular, naked. Antennae situated with their hinder edge scarcely behind the middle of 

 the summit, separated from each other by about three times the diameter of the basal 

 joints, the whole antenna of about the length of the abdomen, composed of from 

 thirty-six to thirty-eight joints, of which from eighteen to twenty form the club, which 

 is about half as long as the stalk; the crook e.xcluded, it is nearly five times as long as 

 broad, rather slender, increasing in size very gradually from the base fully to the 

 middle of the outer half or at about the eleventh or twelfth joint from the tip of the 

 antennae and beyond broadly rounded ofl"; the crook is composed of seven or eight 

 joints and forms along and slender, regularly and gently tapering, pointed appendage, 

 about four times as long as broad and considerably longer than the breadth of the 

 club; middle joints of the stalk and the third from the base of the antennae about 

 four times as long as broad. Palpi stout, twice the length of the diameter of the eye, 

 profusely clothed with long scales, beyoud whicli about lialf the apical joint protrudes ; 

 basal joint buUate, subpyriform, rather broader than long, with a tumid expansion on 

 the inner side of the front of the distal extremity ; middle joint bullate, ovate, the 

 basal end rounded, the upper bluntly conical, a little arcuate, as broad as the basal 

 joint, twice as long as broad ; apical joint seated a little within the middle of the ex- 

 tremity of the middle joint, slender, cylindrical, bluntly pointed at tip, nearly as long 

 as the breadth of the middle joint and fully three times as long as broad. 



Prothoracic lobes rather small, subtriangular, strongly appressed, laminate, the 

 inner edge straight, the lower a little convex, the upper outer edge regularly arcuate; 

 it is nearly half as long again as high and as long as the diameter of the eye. Patagia 

 similar to tliose of Oligoria. 



Fore wing (42 : 19) twice as long as broad, the lower outer angle falling below the 

 middle of the costal margin in the male, distinctly outside of it in the female; the 

 costal margin sti-aight, declivent at either extremity ; outer margin gently and regu- 

 larly convex, slightly bent in the middle in the female; the apex decidedly (^) or 

 somewhat (?) produced. Costal nervure terminating a little beyond the middle 

 of the costal margin ; the subcostal not very closely approximated to the costal mar- 

 gin, the third uervule originating at the middle of the wing ; cell two-thirds as long 

 as the wing, moderately slender, largest just before the apex; first median uervule 

 arising at about midway between the base and the second branch, the origin of which 

 is below the third subcostal nervule; internal nervure short, straight. 



Hind wing one-fourth longer than broad ; tlie upper half scarcely longer than the 

 lower portion of the outer margin, nearly straight, equal, rounded at the upper and 

 lower angles ; basal lobe of the costal region large. Subcostal and median nervures 

 first forking at equal distances from the base, a little beyond the basal third of the 

 wing. 



Discal stigma of male inconspicuous, formed of a very slender, arcuate streak of 

 dead bl.ack, erect rods crossing the middle and lower median interspaces, the latter 

 almost transversely and so farther from the base than in the otlier genera. The scales 

 contained in the stigma consist of exceedingly slender jointed threads, long and very 

 slender scales, rounded and largest at the tip, besides short, truncate scales iu some 

 of the species ; the cover scales when present, small and short. 



Legs 2, 3, 1, in general considerably shorter than in the previous genus. Femora with 

 a thick fringe of hairs beneath, long and decreasing in length from base to tip on all 



