CHAPTER V. 
OX THE ANATOMY OF ALETIA. 
By Charlis Sedgwick Minot and Edward Burgess. 
[Plates VI-XL] 
The following chapter was prepared at the request of Professor Riley, 
to whose kindness we are indebted for the material upon which our 
observations have been made. Several untoward circumstances have 
contributed to interfere with the progress of the investigation. Tho 
work was begin by Dr. .Minot, who was subsequently joined by Mr. 
Burgess, in the hope that our joint labors would prove more efficient 
Nevertheless we find it neeeeeary to leave various points undecided. 
This incompleteness is partly due to the unavoidable imperfection of 
preserved specimens,* and partly to the scanty light yet thrown on insect 
anatomy and physiology. 
ANATOMY OF THE LAEVA. 
The external anatomy of the larva need not be apain described in 
this chapter. There are only a few points to bo noted in regard to the 
legs, the previous descriptions of which arc somewhat incomplete. The 
true legs, Plate VI, Fig. 4, are conical, three-jointed, and provided with 
a terminal hook, Fig. (I, which is curved toward the median line of the 
body, and has at its base a thick swelling, usually described as a fleshy 
pad; the adjective fleshy is hardly appropriate, as the pad is covered 
by a well-developed, hard crust. There are two hairs on the first joint, 
the lowci being much the slenderer. There are four hairs on the lower 
part of the second joint, two on the inner edge rather stout and curv- 
ing, and one fine one just below them, and a long one in front. On the 
last joint again are four hairs, all near the terminal claw, namely, a 
small one in front, a thick, curving one on the side, another thick, curv- 
ing one just above the pad of the claw, and immediately above this the 
fourth hair, which is shaped something like an Indian club, and is ap- 
parently somewhat flattened. The constancy of form and disposition 
of these hairs lead us to think that their arrangement must be of some 
importance, therefore wo have given this detailed description. 
*Socae material prewired In a 5 per cent solution of chloral h3 <lrate was found very useful. With 
this preservative, specimens should !>• opened in several places to allow the fluid to penetrate into the 
interior. Indeed this should be done with alcoholic specimens also. 
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