652 EXTERNAL ANATOMY OF INSECYS. 
their Creator very conspicuously with this almost daz- 
zling glory; but in the insects just named it meets us 
every where. Some, as one of our most beautiful but- 
terflies, Vanessa Io, have them both on the primary and 
secondary wings; others, as Erebus Bubo®, only on the 
primary; others again, as Smerinthus ocellata‘, only on 
the secondary: in some also they are on both sides of 
the wing, as in Hipparchia Aigeria 4, and in others only 
on the upper side, as in Vanessa Jo; in others again only 
on the under side, as in Morpho Teucer © : in some like- 
wise they are very large, as in the secondary wings of 
the same butterfly : and in others very small, as in those 
in the wings of the blues (Polyommatus). Once more, 
in some they consist only of 277s and pupil, as in Hip- 
parchia Semele, and in others of many concentric circles 
besides, as in Morpho Teucer, &c. 
v. Legs‘. We are next to consider those organs of 
motion affixed to the trunk, by which insects transport 
themselves from one place to another on the earth or in 
the water, and by which also they perform various ope- 
rations connected with their economy’. In treating of 
them we should consider their number; kind ; substance ; 
articulation with the trunk ; position ; proportions ; cloth- 
ing ; composition ; folding ; and motions. 
1. Number. Having before very fuliy explained to 
you the number and kind of the Jegs of insects in their 
preparatory states", I shall now confine myself to the 
* Sepp. 1,2, any. 6. » Roemer Genera t. xxii. f. 2. 
© Sepp. I. iii. 4. 1.7, 7. SC Mpids tt. Wl Jed 
e¢ Roemer ubi supr. t. xiv. f. 1. 
}PLAPES $717", a0s ® See above, p. 544—. h Jbid. 131—. 
