G2 PROCEEDINGS OF THE NATIONAL MUSEUM. 



mark. Secondaries white, the fringes marked with a series of black 

 dots at base. Beneath white, with a more or less distinct outer line 

 and discal spot. The spots at the base of the fringes are also duplicated 

 from the upper side. 



Expanse, 1.30 to 1.90 inches (33 to 47 mm.). 



Habitat. — Canada; London, Ontario, May 29; TJrbana and Chicago, 

 Illinois, June 28; Massachusetts; New York; Long Island; Missouri 

 in May; Kansas; Nebraska; Seattle, Washington. 



Twenty-four specimens, almost evenly divided as to sex, are before 

 me from the various localities mentioned. All the dates are in May and 

 June, and the specimens run quite evenly and without any marked 

 variation. The absence of the orbicular and the very short basal streak 

 will serve to distinguish this species in all cases. From its near ally 

 lejrusculina, with which it has been generally confounded, it differs by 

 the broader wings of the female, by a paler and less apparent ground 

 color, as well as by the basal dash and orbicular, as already mentioned. 

 Altogether the species has a very distinctive look when the specimens 

 are brought together and separated from the others. The front is 

 moderately bulging, but is not prominent, while the palpi never exceed 

 the middle, and sometimes do not reach it. The genitalia of the male 

 have the side pieces broad, very obtusely and somewhat irregularly 

 rounded at the tip, while the clasper is of moderate length and rather 

 slender. The legs are moderately stout, the femur quite evenly i)ropor- 

 tioned, the tibia with the epiphysis extending to the tip, as is usual in 

 this section. Compared with leporina the species is narrower winged 

 and more powdery, and the markings are a little more complete; other- 

 wise the resemblance is close. 



LARVA. 



EiLEY, Second Rept. Ins. Mo., 1870, p. 119, (jwpuli). — French, Trans. Dept. Agr., 

 111., 1877, XV, p. L'Ol.— ]\lAUTEN, Trans. Dept. Agr., 111., 1880, XVIII, p. 130.— 

 Saunders, Can. Ent., 1882, XIV, p. 221, tig.; Rept. Eut. Soc. Ont., 1883, 

 p. 24, tig. 



Stage IV. — Width of head, about 2 mm. All whitish, with a green- 

 ish tint. Hair long and white, with black pencils on joints 5, 7, and 

 12, and a few black hairs the whole length from tubercles I and II, 

 almost forming a pencil on joint 8. 



Stage VI. — Width of head, 4 to 4.8 mm. Shining black, as, also, 

 the cervical shield and thoracic feet. Body covered with long, light 

 yellow secondary hairs; five single dorsal black pencils from tubercle 

 I on joints 5, 7, 8, 0, and 12. Those on joints 5 and 12 are the most 

 persistent; some or all of the others maybe weak or absent. Skin 

 sordid white; brownish dorsally on joints 3 and 4. Warts small, con- 

 colorous, obscure; hairs simple, very long, not obscuring the body. 

 Venter shaded with brownish; leg plates partly black. Spiracles 

 black rimmed. 



Cocoon. — Composed of silk and chips of wood. 



