74 PROCEEDINGS OF TEE NATIONAL MUSEUM. vol.xxi. 



costal spot, to a dot or a pair of dots below the cell and another on the 

 internal margin ; occasionally it is entirely wanting. The median shade 

 is indicated by a black spot on the costa and sometimes a shade extends 

 to the center of the reniform. The transverse posterior line is well 

 marked, in most specimens continnous or nearly so, more or less obvi- 

 ously luuiilated, but not dentated on the veins. It is quite squarely 

 bent out over the cell and with a well marked incurve opposite the anal 

 angle. There is a series of terminal dots, bat the fringes are not cut. 

 There is no longitudinal line at base and the orbicular is wanting in 

 most specimens. Occasionally it is marked by a feeble dot aud some- 

 times even by a small ring. The reniform varies from a distinct black 

 crescent mark to a vague dusky lunule. Secondaries white in the 

 female, with a more or less obvious discal mark and an outer median 

 line which is sometimes marked in the middle on the veins. In both 

 sexes there is a series of blackish terminal marks. Beneath there is 

 the usual outer line and the discal lunule on both wings. 



Expanse, 1.40 to 1.85 inches (35 to 47 mm.). 



Habitat. — London, Ontario, June 28; Maine in June; New Hamp- 

 shire; Rochester, Ithaca, Long Island, l^ew York; Pennsylvania. 



This broad-winged species can not be easily mistaken. Its pale colors 

 and simple markings, without trace of black dashes or dagger marks, 

 are quite characteristic. It varies from a form in which all tlie de- 

 scribed markings are easily distinguishable to one in which nothing 

 except the transverse posterior line is evident, and even this hardly 

 black marked. It is rather common within its range, which seems to 

 be not very extended, and thirty or forty specimens have been examined. 

 The head is very distinct, the front a little bulging, the palpi well 

 developed and reaching the middle in most of the specimens. The 

 legs are stout and the femur is quite strongly dilated aud abruptly 

 narrowed at the tip. The tibia is slender, the epiphysis inserted at 

 about the middle, but not reaching to the tip. The tarsus is long in 

 proportion to the rest of the leg. The harpes of the male are narrow 

 and subequal. The clasper is of the usual form, with the upper finger 

 stout and long, while the process from the upper margin is short and 

 rather slender. 



LARVA. 



Beutenmuller, Ent. News, 1891, II, p. 153. 



Stage VI. — Head pitchy brown on the vertices of the lobes ; face sordid 

 white; body dull graiyish brown; warts I and II shining black; two 

 rows of yellow spots along each side, with a row of black spots [or 

 tubercle III ?J between; legs concolorous; secondary hair sparse, sordid 

 white; venter dull grayish. 



Cocoon. — Of bits of wood rudely united. 



Food plant. — Probably hickory (after Beutenmiiller). 



