142 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



Male. — Similar to the extremely uniform pale whitish-ocherous 

 forms of quercivoraria, but with the surface of the "wings appearing 

 somewhat smoother and sheeny; sordid whitish ocherous, evenly 

 sprinkled with cinereous irrorations. 



Alar expanse, 28-32 mm. 



Genitalia inseparable from those of typical quercivoraria. 



Female. — Similar to the male in color and maculation. 



Alar expanse, 30-38 mm. 



Genitalia like those of typical quercivoraria. 



Types. — In "Central Park Collection" (?) 9 (endropiaria) ; Field 

 Museum (fatuaria). 



Type localities. — "'Atlantic District (Penn.)" (endropiaria) ; near 

 Montreal, Canada (fatuaria). 



Food plants. — Quercus. 



Distribution. — United States: Illinois (May, June), Iowa (June), 

 Maine (June), Mart/land, Massachusetts, Michigan (Aug.), New 

 Jersey (June), New York (May), Pennsylvania (May, June), Ver- 

 mont, Virginia (July). Canada: New Brunswick (Aug.), Ottawa 

 (May, June) . 



Fifty-three specimens examined. 



Remarks. — Hitherto endropiaria has been treated as a distinct 

 species. The slighter angulation of the wings (especially those of 

 the females) and the generally more sheeny appearance of most 

 specimens of endropiaria would seem to justify such a treatment, 

 since most examples of endropiaria are easily distinguished from 

 those of typical quercivoraria. However, among specimens from 

 British Columbia, Oregon, and Minnesota there are pale interme- 

 diates that intergrade with specimens of endropiaria and are separ- 

 able only by locality labels. There are no constant structural dif- 

 ferences in the genitalia or larvae of the two forms. In view of the 

 easy separation of most examples, the name merits retention and 

 designates a variety of quercivoraria but no more than that. 



7. BESMA BREA (Druce) 



Plate 5, Figures 15, 15A ; Plate 10, Figure 34 



Metanema brea Druce, Biologia Centrali-Americana, Insecta, Lepidoptera- 

 Heterocera, vol. 2, p. 68, 1892 ; vol. 3, tab. 47, fig. 26, 1881-1900. 



Male. — Upper surfaces of fore and hind wings reddish brown with 

 a metallic luster, thickly irrorated with yellow; body and under 

 surfaces of wings paler. Fore wing with two rather straight sub- 

 parallel transverse lines; anterior and posterior lines edged inwardly 

 and outwardly respectively with gray; a black distal dot. Hind 



"Grote, Can. Ent., vol. 14, p. 109, 1882. 



