A REVISION OF THE DELTOID MOTHS SMITH. 47 



isli .slnuic on tlic custii. Transverse uiitcrior liiu' sloiidei', even, brown, 

 widely outcurved and outwardly a.n,<;iilate in the interspaces. It is 

 rjirely distinct and sometimes entirely \\ antino;, Transveuse j)osterior 

 line broad, brown, inwardly dilTuse, wideumj; to the liiii*! .margin. It 

 is outwardly bent on the costa and then runs rigidly obli(iue inwardly, 

 reaehinj^- the hind niaroin at its middle. A paler shade Ibllowing the 

 line, (]uite marked in some specimens, merging insensibly into the 

 ground color, which in turn darkens to the rigid brown subterminal 

 line, which runs from the apex without curve or bend to the inner mar- 

 gin, well within the anal angle, and is followed by a somewhat defined 

 pale line. iV continuous brown terminal line, followed by a yellow line 

 at the base of the fringes. Orbicular wanting. Keniform indicated by 

 two black dots at the end of the cell. Secondaries paler, with a dusky 

 median line, and a pale external line which is somewhat irregular and 

 is preceded by a brown shade. Beneath, darker, with dense, coarse, 

 ocherous brown powderings. There is a distinct, broad, common 

 median line, and a less evident pale subterminal line, which on second- 

 aries is ofteu preceded by a dusky shade. All wings with a discal 

 spot. 



Exi)ause of wings, 24 to 'JG mm. =0.06 to 1.05 inches. 



Habitat. — Canada, south to Virginia: west to the Mississipj)i 

 States. New York in July. 



This is the most common of the species, and always easily recognized 

 by the brown shaded transverse posterior and subterminal lines. There 

 is very little variation, and this chiefly in the relative distinctness of 

 the transverse anterior line. 



The antennte of the male have been generally described under the 

 generic heading. The pectinations are long, and from most of them 

 there arises near the tip a long slender bristle, which replaces the 

 pectinations inwardly at the basal third. At this point two joints 

 bear each a stout corneous process, and next to each a stiff bristle or 

 spine. The pectinations are ciliated, the hair very fine and moderate 

 in length on the inner underside. Just below the pectination on that 

 side is also, on each joint, a short chitinous process, bearing in a pit a 

 short stout bristle or spine. 



The fore legs of the male are extremely modified. The coxa is long, 

 grooved, furnished with long hair, forming no tufts or pencils. The 

 trochanter is shorter, but nearly double the length of the fenuir. Tlie 

 latter is short and stout, with a circular disklike enlargement at base 

 of underside, which is furnished with coarse pittings and with long- 

 black specialized scales. On the upper side it is fringed with similar 

 longer hair and scales, forming no tufts. The tibia is reduced to an 

 oval mass of scales covered by a chitinous shell, and tlie tarsi are 

 rudimentary, almost completely aborted. The legs furnished with 

 these structures have, of course, entirely lost their normal function as 

 organs of locomotion, and are exami)les of modification run riot. 



