12 William T. M. Forbes 



Sexual forms (a few striking examples) : 



Argynnis diana (male red, female blue). 



Argynnis idalia (male with, red marginal spots, female with white). 



Chrysophanus tho'e (male purple, female red and black). 



Lyccena pseudargiolus (female only with black border). 



Lyccena comyntas and scudderi (male blue, female black). 



Pieris rapes (female with an additional spot). 



Eurymus philodice and eurytheme (female with spots in border). 



Pamphila brettus and zabulon (male tawny, female black). 



Callosamia promethea (male black and diurnal, female red and noc- 

 turnal) . 



Automeris io (male yellow, female dark). 



Eacles imperialis (male with red patches, absent in female). 



Estigmene acrcea (male with yellow hind wings, female white). 



Apantesis phalerata (male with pale hind wings, female with red) . 



Alypia langtonii (eastern male with two white spots on hind wing, 

 female always with one yellow). 



Tarache terminimacula (pattern different in sexes). 



Biston quernaria (male dark and short-winged, female light and long- 

 winged). 



Erannis tiliaria (male yellow and brown, female black and white, and 

 wingless). 



Nymphula maculalis (male black and white, female normally gray). 



Nymphula seminealis (male with white submarginal band). 



Acrolophus mora (male blackish, female brown). 



Prionoxystus robinice (male with yellow hind wing, female gray). 



Prionoxystus macmurtrei (female many times larger than male). 



Dimorphism not wholly sexual (so far as known, Mendelian) : 



Eurymus species (white and yellow females). 



Eurymus eurytheme (both sexes yellow or orange). 



Pieris rapes (white), and novcaanglice (yellow male). 



Papilio turnus (yellow), and glaucus (southern black female). 



Pamphila hobomok (tawny), and pocahontas (black female). 



Pamphila massasoit (yellow below), and suffusa (dark below). 



Apantesis nais (red and yellow females) ; also many less striking 



cases in the genus. 

 Catocala palceogama and other species of Catocala (black-banded 



forms). 

 Deilinea liberaria (tawny), and helena (brown-banded). 

 Aplodes brunnearia and bistriaria (green and brown forms). 

 Nymphula icciusalis (yellow or brown ground). 

 Nymphula maculalis (dark or spotted male; white or gray female). 



