70 



more than in Anthercea mylitta. There is, however, a 

 curious correspondence between the scales of the moth 

 Anthercea mylitta, which are the largest, and the fibre spun 

 by its larva, which is the coarsest, and between the scales 

 of the moth Bombyx mori, which are the smallest, and the 

 fibre spun by its lava, which is the finest. 



In some of the species the difference between the scale 

 of the male and those of the female is considerable. In 

 Anthercea mylitta the extremities of the scales of the male 

 are much more digitate, whilst in the female they are 

 simply serrated. In Anthercea yama-mai the scales of the 

 male appear to be broader and shorter than of the female. 

 The greatest divergence, however, is in the case of our 

 English moorland species, Satumia carpini, or the 

 Emperor moth (Plate LI., Fig. 2). The scales of the male 

 bear some resemblance in shape to those of Bombyx mori, 

 whilst those of the female have extremely long spikes at 

 the two outside edges, forming horn-like processes. 



The bodies of the moths are generally covered with 

 downy hairs, becoming in some species very long at the 

 inner extremities of the winffs. 



I have had drawings made of the scales of twelve species 

 much more highly magnified, to ascertain their structural 

 differences. I have taken a single scale of each of the 

 twelve species from the part of the wing indicated in 

 Plate XXIII., Fig. 2, and magnified it 500 diameters (see 

 Plates LIII, and LIV.) 



