18 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii9 



pp. 243-244. — Rawsou and Hessel, 1951, Bull. Brooklyn Ent. Soc, vol. 46, 

 pp. 79-84, 5 figs, [of eggs, larvae, pupae]. — Klots, 1951, Field guide to 

 butterflies of North America east of the Great Plains, pp. 133, 144, plate 15 

 fig. 12.— Clark, A. H., and L. F. Clark, 1951, Smithsonian Misc. Coll., 

 vol. 116, no. 7, pp. 78, 79, pi. 12 h. — dos Passos, 1964, Synonymic list of Ne- 

 arctic Rhopalocera, p. 56. 

 Strymon cecrops ab. gottschalki Clark, A. H., and Clark, L. F., 1938, Proc. Biol. 

 Soc. Washington, vol. 51, p. 3 (new synonymy); 1951, Smithsonian Misc. 

 Coll., vol. 116, no. 7, p. 78, frontispiece fig. 7. 



Male (figs. 61-64 [summer form], 67, 68 [spring form]). — Wing^ 

 above usually entii-ely dark brown, sometimes with a smaU suffusion 

 of blue in interspace Cui and Cu2 on hindmng; a pale submarginal 

 bluish-white line below vein Cu2 on hindwing, this line sometimes 

 extending above through part of interspace Cui; anal lobe with a 

 few red scales and a minute white bar at indentation above this lobe 

 on abdominal margin. Wings below drab or hairbrown in color 

 with markings similar to the other species of Calycopis] base of costal 

 margin of forewing orange red, and with two parallel bars slightly 

 darker than ground color crossing the end of each discoidal cell, these 

 bars frequently red in color, and with area between these bars dirty 

 white. C. cecrops differs from the other species, particularly in 

 having the orange red along inner side of postmedian band much 

 broader on the under surfaces of hindwing; in having the black 

 pupiUated submarginal spots in interspaces M3 and Cui gray, only 

 rarely orange red; in having the lunule adjacent to outerside of 

 W-shaped portion of postmedian band usually dark brownish gray, 

 only rarely red or with a slight red suffusion and in having a larger 

 black spot on the anal lobe. 



Length of f ore-wing 11-15 mm. 



Male genitaha, as illustrated by figm-e 9, with distal margin of 

 lateral lobe of uncus convex and with lower margin of lobe undulate, 

 convex near base and concave before lower distal angle. Eighth 

 tergite (figure 20i) very similar to that of janeirica and with posterior 

 concavity sUghtly broader than in isoheon. 



Female (figs. 65, 66, 69 [spring form], 70 [summer form]) . — Wings 

 above sometimes entirely like the male but usually differing in having 

 a great deal of blue over disc of hindwing. Wings below quite like 

 those of the male. 



Length of forewing 11-14 mm. 



Female genitalia, not illustrated, and not different from C. susanna, 

 and as in that species having the posterior ostium bursae lobes either 

 rounded or armed with two spines, 



Va ELATION. — Spring specimens of both sexes differ from summer 

 specimens in having more blue on the wings above with smaller 

 fuscous submarginal spots on the hindwing. On the undersurfaces 



