334 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
the other twig-mimickers do not live among the deuser leaves, but at 
the end of the twig. 
Larva. — Head AS wide as the body, deeply cleft and flattened in front. On each 
side of the mesothoracic segment is a large prominent tubercle ; on second abdominal 
segment is a double dorsal tubercle ; a transverse series of four sharp piliferous 
tubercles. Supra-anal plate large, broad, flat, triangular, but rather short and blunt 
at tli<- tip; six piliferous warts on the edge; surface of the body closely granulated. 
Color of a uniform mottled gray, like the bark of the twig it inhabits, with a con- 
spicuous dorsal black line extending from the mesothoracic segment to the base of 
the supra-anal plate. On the sides low down between the first and anal legs is a 
fringe of woolly, somewhat fleshy filaments. A pair of dorsal black dots on the back 
part of each abdominal segment. Length, 40 mm . 
17. Jcrobasis (Phycita) juglandis Le Baron. 
Dr. Le Barou in his account of this Phycid states that it lives both 
upon the hickory and black walnut. (See Hickory inshcts, p. 311.) 
18. Lithocolletis juglandiella Clem. 
The larva makes an elongated, rather wide tract on the upper surface of the leaves 
of black walnut, without foldiug the leaf, and may be found from the beginning to 
the middle of the month. 
It belongs to the second larval group described in the Proceedings 
of the Academy of Natural Sciences of Philadelphia, November, 1859, 
and may not be specifically distinct from L. caryccfoliella^ described on 
page 315. (Clemens.) 
Larva. — It is blackish or blackish brown, with a few pale-brownish dots on each 
side of the thoracic segments, and with the tip of the abdomen and head pale brown. 
(Clemens.) 
19. Nepticula juglandifoliella Clem. 
The larva mines the leaves of black walnut from the latter part of July to the 
middle of August. The mine is a very narrow, whitish tract, very often recurved 
and slightly tortuous, somewhat, although slightly, enlarged at its end, with a very 
narrow central line of ** frass." 
u I found a single specimen on the 27th of last August, when the mines 
appear to be usually untenanted, and, very oddly, it escaped from its 
mine as I held the leaf, whilst looking unsuccessfully for another speci- 
men." (Clemens.) 
Larva.— The larva is pale green, almost whitish, rather thick and resembling a 
Dipterou. (Clemens.) 
20. Gracilaria blandella Clemens. 
The caterpillar when small lives in a linear whitish mine in the 
upper surface of the leaves, afterwards feeding and pupating under 
the turned-down edge. 
21. Gracilaria juglandinigrecella Chambers. 
The larva at first mines the leaves beneath, afterwards feeding and 
pupating under the turned-up edge. 
