362 Mr. J. W. Tutt on Classification of Lepidoptera. 
specialised forms of the group Attacinse ; and again, 
whilst the late embryos of the Attacinse are perhaps 
paralleled by the fully-grown larva of Saturnia, the 
fully-grown larva of the most, or one of the most, 
generalised Attacinfe, Platysamia, is on the same plane 
of specialisation as the larva of Gallosamia in its third 
stage/^* It seems to me that Mr. Hampson and I mean 
aUke, the difference is purely a matter of words, whether 
we choose to call the larva an embryo or not. My state- 
ments in the early part of the paper appear to be in no 
way antagonistic to those in Mr. Hampson^s letter. To 
explain why I prefer to consider the larva to be embryonic 
in many respects, would occupy too much space here and 
not advance the subject under discussion. 
Quite recently Mr. Vernon L. Kellogg has shown f 
that Micropteryx and Hepialus have, in addition to the 
ordinary scales on the wiugs, a covering of very fine 
hairs differing radically from the scales in size, arrange- 
ment and mode of attachment to the membrane — a 
Trichopterygid character. These hairs have not yet been 
discovered in any FEENATJii. The paper deals also with, 
and illustrates, types of thoracic structure confirming 
Comstock's classification. 
* Packard, " Studies on the Transformation of Moths of the 
Family Saturniidse," Proc. of the Amer. Acad, of Arts and Sciences, 
1893. 
t "The Classification of the Lepidoptera," American 
Naturalist, Vol. xxix., pp. 248-57 ; Plate xvii. 
