J 9 



as before. The antenna; (Plate II, Fig. 8) are directed backward, 

 and extend a little more than half way to the base of the fore legs. 

 They are rather thick at the base, gradually tapering to the apex and 

 bearing numerous blunt spines or papillae. Of these, two near the 

 base, one on each side, are especially prominent in most specimens. 

 Two segments can usually be distinguished in the antennae, the 

 basal segment being about one-third as long as the apical one. Oc- 

 casionally the basal third of the apical segment appears to be cut off 

 as a third segment. The antenna? are immovable, or practically so, 

 in this stage as well as the following immature stages. The legs are 

 a little longer than the antennas and of the form of a truncated cone, 

 transversely wrinkled, with no distinct segments, and terminate in a 

 rounded knob, which probably has an adhesive function. As a 

 whole, the legs are suggestive of the prolegs of caterpillars. A trans- 

 verse wrinkle which usually appears at about two-thirds the distance 

 from the base to the tip, possibly indicates the line of division be- 

 tween two segments. A pair of minute spines is usually found on 

 the basal parts of the second and third pairs of legs, one on the inner 

 and one on the outer side. The external mouth organs appear as in 

 the first instar. The anterior end of the prostomial plate is indis- 

 tinct, and the pair of spines which occurs there in the first instar is 

 now wanting. The pair of spines on the ventral surface below the 

 operculum is present as before. Near these in some specimens the 

 oval gland openings can be seen, their relative position being as 

 before. Each spiracle, or tracheal opening, of the two anterior pairs 

 appears to be double in this instar, consisting of a moderately large 

 opening with a smaller one directly behind it. 



The color of the body is the same as in the first instar ; the 

 length varies from .341 to .407 mm. ; the width varies from .189 to 

 .235 mm. 



Third Instar. (Plate III, Figs. 11 and 12.J 



In this instar the form, marginal and dorsal spines, marginal 

 wax secretion, ventral spines and color of the body are as in the sec- 

 ond instar. The legs are of about the same proportionate length, 

 while the eyes are relatively smaller than before. The vasiform 

 orifice is longer than wide, resembling a triangle with rounded cor- 

 ners in form, its apex distinctly indented. The lateral chitinous 



