116 PROCEEDINGS OF THE NATIONAL MUSEUM. vouxxi. 



by blackisli scales and centered with brown; tbe reniform quite large, 

 kidney shaped, defined inwardly by black scales, but outwardly difluse. 

 It is shaded with reddish, which extends a little beyond it and shades 

 into a whitish space following the interval between it and the transverse 

 posterior line. Secondaries smoky, paler at the base; in the female 

 with an indeflned discal spot and outer line. Beneath whitish, pow- 

 dery, all wings more or less evidently marked with an outer line and a 

 blackish discal spot. 



Exiiause, 1.25 to 1.10 inches (31 to 35 mm.). 



ffahitat. — Canada in August; Staten Island, New York, in July; 

 Washingtcm, District of Columbia, in August; Illinois in July. 



This species is quite easily recognizable by the blackish shade which 

 extends through the wing below its middle, from the base to the outer 

 margin. It differs altogether from /t<«6'r«i/,s', because tlie shade does 

 not reach the internal margin, and is iudefined, shading gradually from 

 smoky into the ground color. The wings are rather narrow, the outer 

 margin a little obtuse. It varies in the depth of the dark shading, and 

 sometimes becomes rather confusedly marked throughout. The vesti- 

 ture is a little rough, and under the lens the scales are seen to be dis- 

 tinctly elevated. The head is rather small, the front convex, but not 

 bulging; the palpi are well develoi)ed but do not reach above the 

 front. The legs are rather slender, the femur hardly dilated, the tibia 

 long, with the epiphysis slender and inserted quite close to the base. 

 The harpes are broad, somewhat abruptly narrowed from the und'br 

 side to a rounded tip. The clasper is very stout, gradually narrowing 

 to a coarse, beak-like process, giving rise on the upper margin to a 

 stout, long, slightly curved process. It has a distinct resemblance in 

 this respect to. /'»»<rft/is, although the lower process is altogether dif- 

 ferent in its character. 



^ LARVA. 



Stage VI. — Green form : '' Head with a red stripe at each upj)er side, 

 reaching from vertex and pointing toward ocelli, diminishing in size 

 and becoming darker toward tip. Body largest in the middle, joint 2 

 somewhat suddenly depressed from side view; dark green, a broad 

 subdorsal sulphur yellow line" covering tubercle II and just passing 

 outside of I, "and a faint subobsolete pale stigmatal one; sparsely 

 covered with long white hairs." Tubercles I and II "jet black, each 

 giving rise to about one black hair. Joint 2 with two black marks, 

 parallel, bent at right angles outward at the front end." (Riley manu- 

 script.) 



Brown form: "Carneous, the dorsum bluish and margined each side 

 with deep yellow. Dorsal trapezoidal spots with a pale bluish annula- 

 tion. Under a lens the body is covered with extremely fine elevated 

 speckles, especially on dorsum. Joint 2 with two elbowed lines, diverg- 

 ing in front. Dorsalwarts with black hairs, the rest long and light. 

 Venter immaculate. Head and spiracles black." (Riley.) 



