256 PROCEEDINGS OF THE NATIONAL MUSEUM vol.90 



margin an inwardly oblique, narrow, antemedian silvery line, which 

 does not reach costa; from costa a postmedian outwardly oblique 

 silvery bar reaching about one-half distance across wing ; opposite it 

 from inner margin a semicircular silver bar, the outer half of which is 

 composed of lead colored scales; all the above silvery bars narrowly 

 edged with black; cilia golden-yellow except a few before tornus 

 which are fuscous. Hind wing and cilia fuscous. Fore and middle 

 pair of legs chiefly black and white; hind pair lighter. Abdomen 

 fuscous. 



Male genitalia. — Harpe elongate, slender ; cucullus bluntly pointed ; 

 sacculus broad with a terminal curved projection extending beyond 

 cucullus. Anellus a more or less rectangular sclerotized plate with 

 widely separated lateral processes ; the processes about twice the length 

 of the central plate. Aedeagus stout, slightly narrower at the mid- 

 dle than at the extremities ; distal end terminating in a sharp, thorn- 

 like point; vesica armed with one long straight cornutus. Gnathos 

 drawn out into a blunt point medially. 



Female genitalia. — Genital plate broad, moderately sclerotized. 

 Ostium large, oval. Ductus bursae strongly sclerotized in posterior 

 half and armed with 12-18 strong teeth inwardly. Signum a small, 

 strongly sclerotized toothed plate. 



Alar expanse, 10-13 mm. 



Type. — In the Academy of Natural Sciences of Philadelphia. 



Type locality. — "Pennsylvania." 



Food plants. — Dead wood and bark of hickory, larch, elder, elm. 



Distribution. — Eastern United States. 



United States records 



Illinois: Decatur, S S $ (June 16-23). 



Iowa: Sioux City, $ ("9-18," C. N. Ainslie). 



Kentucky: 9 (no data). 



Maryland: Cabin John, $ (August 1902, A. Busck) ; Plummers Island, 2 $ $ 



(July 1903, A. Busck) ; 5 ('07, Barber and Schwarz) ; 9 (July 17, L. J. 



Bottimer). 

 New Hampshire: Central Harbor, 9 (July 30, 1902, H. G. Dyar) ; S (no locality; 



A. Busck). 

 New Jersey: 3 $ $ (no locality; A. Busck and Wm. Beutenmiiller) ; Essex 



County, 6 $S, 2 9 2 (July, W. D. Kearfott) ; Montclair, $ (8-6-99, 



W. D. Kearfott). 

 New York: Woodhaven, Long Island, 9 (6-VI-21, G. P. Engelhardt) ; 5 (no 



locality, Wm. Beutenmiiller). 

 Ohio: Cincinnati, 3 S S, 9 (VII-2-5-1907, VIII-3-07, VI-16-08, A. F. Braun). 

 Pennsylvania: Arendtsville, S, 9 (6-VII-1921, S. W. Frost); Harrisburg, $ 



(30-VII-1914, W. S. Fisher) ; New Brighton, $,299 (16-VII-1907 and 



28-VII-1907, H. D. Merrick) ; Oak Station, Allegheny County, 7 $ $, 9 



(June and July 1906 to 1908, Fred Marloft) ; Pittsburgh, 9 (24-VI-06, 



Henry Eugel). 



