92 INVERTEBRATE ANIMALS. 



A". Dark lines expanded, forming patches and 



scallops. Arge Galathea. British. 

 A'". Dark lines expanded, forming a blackish 

 area, and leaving the pale ground visible 

 only in spots or markings. Thymele alve- 

 olus. British. Lasiommata Mgeria. British. 

 B'. Blush, occupying a space near the tip. 



Anthocaris cardamines. British. 

 B". Blush, occupying nearly all the area of the 

 wings. 

 Note. — Even where, as in Euplcea Treitschkei, only 

 a small spot or two of white is shown on the wings, it 

 is pretty plain that the ground colour of the wing is 

 white, almost wholly obscured by a greater development 

 of the dark scales belonging to the veins. The irides- 

 cent scales, except when forming metallic markings, as 

 on the under side of the Fritillaries, are gen era 

 mingled with dark scales (rarely with the pale groun 

 scales), the edges of the areas in which they prevail 

 being shaded off, as in Ajyatura Iris. British. 



The Common Admiral, Pyrameis Atalanta, is an 

 example of the combination of A'" with B". Wherever 

 the black does not extend, is shewn the red blush, which 

 does not however reach quite to the tip of the fore wing, 

 for there, apertures in the black show the white or pale 

 ground colour in spots. The New Zealand Admiral, 

 Pyrameis gonerilla, on the under-side of the fore wing 

 indicates plainly that the true character of the red area 

 is that of a blush on a pale ground. The subject is more 

 fully treated by the Writer in a paper which ajspeared 

 in the Quarterly Journal of Science, for July, 1868, 

 and has been honoured with a favourable notice by 

 Mr. Darwin {Descent of Man, vol. ii., p. 134, note). 



