136 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



3. Color pale testaceous, with a slight pinkish tinge, without con- 



spicuous ocherous patches 4. rubritincta (Cassino and Swett) 



Coloration not as above 5. quercivoraria (Guenee) 



4. Aedeagus with a strongly sclerotized ventrodistal bifurcation 



3. marilacta (Dyar) 

 Aedeagus without such ventrodistal bifurcation 5 



5. Gnathos broad ; furca rather abruptly enlarged distally 



8. mattearia (Schaus) 



Gnathos narrower; furca not abruptly enlarged distally 7. brea (Druce) 



Females 



1. American species north of Mexico 2 



Mexican and Central American species 4 



2. Color pale testaceous, with a slight pinkish tinge, without con- 



spicuous ocherous patches 4. rubritincta (Cassino and Swett) 



Coloration not as above & 



3. Ventral margin of genital opening bordered by a rather broad, 



strongly sclerotized band with even anterior margin; ventral 



operculum strongly sclerotized 5. quercivoraria (Guenee) 



Ventral margin of genital opening bordered by a rather narrow, 

 crinkled, moderately sclerotized baud, anterior margin uneven 



1. sesquilinearia (Grote) 



4. Ventral margin of genital opening bordered by a rather broad, 



strongly sclerotized band with even anterior margin 5 



Ventral margin of genital opening bordered by a rather narrow, 

 crinkled, moderately sclerotized band, anterior margin uneven 



3. marilacta (Dyar) 



5. Sclerotization of ductus bursae extensive, usually extending from 



genital opening to junction of ductus bursae with bursa 



8. mattearia (Shaus) 

 Sclerotization of ductus bursae much less extensive, usually less 

 than one-half length of ductus 7. brea (Druce) 



1. BESMA SESQUILINEARIA (Grote) 



Plate 6, Figures 16, 16A ; Plate 9, Figure 30 



Endropia sesquilinearia Gbote, Can. Ent., vol. 15, p. 125, 1883. 



Euchlaena sesquilinearia (Grote) Hulst, U. S. Nat. Mus. Bull. 52, p. 341, 1903 — 



Barnes and McDunnough, Check list of the Lepidoptera of Boreal America, 



No. 4694, 1917. 

 Destutia sesquilinearia (Grote) McDunnough, Check list of the Lepidoptera 



of Canada and the United States of America (Part 1, Macrolepidoptera), 



No. 5121, 1938. 



Male. — Pale brownish ocherous, wings rather densely sprinkled 

 with pale fuscous. Fore wing ungulate; transverse anterior and pos- 

 terior lines testaceous, nearly straight or evenly curved. Hind wing 

 with outer margin rounded or but slightly produced at vein 4; trans- 

 verse line evenly curved, appearing as a continuation of the posterior 

 transverse line of fore wing. 



Alar expanse, 42-45 mm. 



