152 BULLETIN 132, UNITElJ STATES NATIONAL MUSEUM 



and also a faint reddish suffusion on the postmedian pale area; 

 the dark markings on basal half being tawny white. In other speci- 

 mens, agi'eeing in all details of pattern and genitalia with the typical 

 form, these dark markings are tawny olive throughout and there is 

 no trace of any reddish shading. 



Harpe of male genitalia figured from specimen in National Col- 

 lection from Cincinnati, Ohio (Braun " VII-2-04") ; female genita- 

 lia similar to those of troglodanum (see Fig. 219). 



Bursa of female without signum. 



Distribution. — Ohio, Pennsylvania. 



Alar expa'nse. — 15-19 mm. 



Type. — In Museum Comparative Zoology. 



Type locality. — Kentucky, 



Food plant. — Fagus sylvatica^ Ostrya. 



33. EXARTEMA SERICORANUM Walsingrham 

 (Fig. 95) 



Exartema sericoranum Walsingham, Illus. Lepid. Heter. Brit. Mus., 

 vol. 4, 1879, p. .36. — Febnald, in Dyar List N. Amer. Lepid., no. 5013, 

 1903. — Baknes and McDunnotjgh, Clieck List Lepid. Bor. Amer., no. 

 6796, 1917. 



Cymolomia sericorarm Foiibes, Memoir 68, Univ. Agr. Exp. Sta., 1924, 

 p. 466. 



Cymolomia myricana Keakfott (ms), Ins. New Jersey, 1910, p. 539. 



Another variable species in color, but with rather uniform pattern 

 and structure. Most apt to be confused with melanomesuin Hein- 

 rich from which it differs structurally in having a narrow uncus 

 and a different grouping of the spines (X) on sacculus near the arch 

 of the neck of the harpe. It also has the subapical bar of fore wing 

 a uniform color throughout and not shading darker toward costa 

 as is the case in vielanoinesum. Kearfott's manuscript species 

 '''' myricana'''^ I am unable to separate from what has generally been 

 identified as sericoranum. 



Harpe of male genitalia figured from specimen in National Col- 

 lection from Lacy, New Jersey (Kearfott, "¥11-14-07"). Female 

 genitalia similar to those of troglodanum. 



Bursa of female without signum. 



Distribution. — Maryland, New Jersey, Connecticut, Massachusetts 

 New Hampshire, Quebec. 



Alar expanse. — 15-18 mm. 



Type. — In British Museum, 



Type locality. — North America. 



Food plant. — Myrica. 



