1894.] 



THE BRITISH NATURALIST. 



161 



P. Corydon, male silvery blue, female light brown. 

 P. Adonis, male sky blue, female light brown. 

 P. Alexis, male lilac blue, female light brown. 



The females of these three species are exceedingly variable, and 

 some of them closely resemble the male in colour. 

 P. ^Egon, male lilac blue, . female light brown. Some females more 



resemble the male colour. 

 P. Acis, male lilac blue, female bluish brown. 

 P. Alcis, male bluish brown, female dull brown. 

 H. Semele, female by a distinct broad cream-coloured band. 

 S. yEgeria, female by the spots being larger and more numerous. 

 S. Megsera, male by a broad brown oblique streak on the fore-wings. 

 S. Tithonus, male by a broad brown oblique patch in the centre of 



the fore-wings. 



S. Janira, female by a fulvous patch towards the tips of the forewings. 



S. Hyperanthus, female by the larger and more distinct spots. 



E. Medea, female by the larger and more distinct spots. 



A. Iris, male by a splendid glow of changing purple. 



A. Paphia, male by black longitudinal ribs on the fore-wings. 



A. Aglaia, Adippe, Lathonia, Euphrosyne, and Selene, females by 



being darker and more spotted. 

 H. Sylvanus, Linea, Comma, Lineola, and Actseon, males by a 



black streak on fore-wings. 



Now let us proceed to the moths. 



First of all, we have a most wonderful colour difference in the sooty 

 black male and snowy white female of Arctia mendica. Next Lithosia 

 quadra offers great dissimilarity, the wings of the male being of a dull 

 grey, with a yellow base, those of the female of a deep yellow with two 

 conspicuous black spots. Quite as wonderful a difference as in these 

 two may be seen in Hepialus humuli, the male being of a snowy white, 

 the female of a deep dull yellow. In Hepialus hectus also there is a 

 great difference, the male being of a dull orange with conspicuous white 

 spots, the female of a pale brown, with indistinct spots. Another great 

 difference may be seen in Liparis dispar, the male of which is smoky 

 brown, the female yellowish white. 



The other Bombyces in which colour difference is discernible are : — 



Lithosia helveola, female much darker than the male. 

 Bombyx quercus, male rich chocolate brown, female pale yellow. 

 Bombyx rubi, male reddish brown, female purplish brown. 

 Bombyx castrensis, male pale ochreous, female reddish brown. 

 Trichiura crataegi, female of a much lighter grey than male. 

 Odonestis potatoria, male dull reddish yellow, female of a deep pale 

 yellow. 



