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Sect. I. Antennae of male bipectinate with long branches, the 

 apex ciliated; 



A. Secondaries rufous or pale; 



a. Reniform, orbicular and claviform marked with white serrata. 



b. Reniform, orbicular and claviform marked with 

 ochreous form ochrimacula. 



B. Secondaries fuscous repleta. 



Sect. II. Antennae of male bipectinate with very short fasciculate 

 branches; (Extremely heavily serrate?); 



A. Claviform a prominent pale streak; median area of pri- 

 maries usually contrasting and darker than the remainder 



of the wing pallescens. 



B. Claviform a pale streak but not conspicuous; median 

 area of the primaries usually not conspicuously con- 

 trasting with basal area medialls. 



Sect. III. Antennae of male strongly serrate and fasciculate; 



A. Thoracic vestiture composed mainly of elongate bi- and 

 tridentate scales ; primaries decidedly brownish or ru- 

 fous-brown ; secondaries tinged with at least some fus- 

 cous; 



a. S. t. space with little gray powderings; secondaries 

 tinged with fuscous; primaries normal, not conspic- 

 uously elongate and narrow ; 



(a) Claviform a pale streak, faintly marked by darker 



color above and below intermedia. 



(b) Claviform normal, faintly outlined by darker 



color obliqua. 



b. S. t. space conspicuously gra}^ powdered, contrasting; 

 secondaries strongly tinged with fuscous, paler basally; 

 primaries elongate, narrow Columbia. 



B. Thoracic vestiture composed of hair and hair-like scales 

 with a mixture of very narrow bidentate and a few tri- 

 dentate scales; primaries cream tinged with pale rufous; 

 secondaries pale cream-white slightly suffused with 



rufous ximena. 



Sect. IV. Antennae of male minutely serrate and fasciculate ; 



a. Hind wing with a dark postmedial line (median 

 shade) ; 



(a) Size large, 42-60 mm; spines on tarsi very heavy immanis 



(b) Size moderate, 37-50 mm; spines on tarsi lighter; 

 European, introduced into Nova Scotia micacea 



