Oct., '07] ENTOMOLOGICAL NEWS. 323 



basal diameter about one-third their length. The fourth is rather 

 smaller while the next four are still smaller and shorter. The last three, 

 however, are much larger and increase in size, the last one being fully 

 as large as the first one of the row. Each horn bears two or three black 

 spines on its tip, the larger ones bearing three, and the smaller ones 

 two, usually each spine being nearly as long as the horn on which it is 

 borne. The horns are white with transparent areas. The first two 

 lateral horns are about equal to the sub-dorsal horns of the same seg- 

 ments, in size and appearance, but the next six are rather smaller. The 

 last lateral, however, is large and like the sub-dorsal of that segment. 

 The larger of these horns bear three black terminal spines, while the 

 smaller ones seem in some cases to bear but two, though the exact 

 number could not always be determined. The color of the lateral horns 

 is like that of the sub-dorsal ones. An evident depression along the 

 mid-dorsal line is present. Color beneath like that above. Legs not 

 distinguishable. Duration of instar, about three days. 



Blackish streaks appear in the horns at the base of the spines toward 

 the end of the instar — possibly the spines of the following instar. 



Second Lan-al Instar. — Length 1 4/5 to 2 mm. at rest; about 2 2/5 

 mm. when in motion. Annulations of the body more pronounced. Gen- 

 eral color yellowish white, but there is a dark spot on each side of the 

 head, the mouth parts are dark and the clypeal region is brownish. 



Mandibles brown on edges, four-toothed. Maxillae showing two 

 teeth or lobes. Viewed from beneath a cresentic lobe lies just above 

 the mouth, bearing a number of hairs. 



Antennae of three segments and a terminal bristle. The first three 

 sub-dorsal horns are very large and stout, and bear many spines with 

 black tips. The fourth is very small and bears two small spines. The 

 fifth, sixth, seventh and eighth are larger, about equal in size, and each 

 bears five or six spines. The ninth and tenth are much larger, equaling 

 the second and third, and with many spines on the outer fourth. The 

 eleventh is like the first, these two being the largest and having scat- 

 tered spines to their bases. The first lateral horn is of medium size, 

 rather blunt, but little longer than its basal diameter and bearing sev- 

 eral terminal spines and a ring (?) of them a little lower. Second 

 lateral very large — as large as the first sub-dorsal — about twice as long 

 as its basal dimeter, and with numerous spines on its tip and sides. 

 The third to eighth lateral horns, inclusive, are about the size of the 

 first, short, stout, with a long spine or two at the tip and a few shorter 

 Ones on the sides near the tip. The ninth lateral is about like the elev- 

 enth sub-dorsal, but perhaps more slender. The lateral horns of the 

 middle of the body are larger and stouter than the sub-dorsal horns of 

 that region. Skin glistening, and with minute punctures. Heart beat- 

 ing plainly seen, and also dark-colored food in the alimentary canal. 

 Legs very small, but actively used; of the usual structure. 



