334 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



the other twig-miinickers do not live among the denser 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 the tip; six piliferous warts on the edge ; surfiice 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 liue 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 ou the back 

 part of each abdominal segment. Length, 40""™. 



17. Acrohasis {Phycita) juglandis Le Baron, 



Dr. Le Baron in his account of this Phycid states that it lives both 

 upon the hickory and black walnut. (See Hickory inshcts, p. 311.) 



18. LithocoUetis jiiglatidiella Clem. 



The larva makes an elongated, rather wide tract on the upper surface of the leaves 

 of black walnut, without folding 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. carycefoliella, 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. Tbe 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." 



" I found a single specimen on the 27th of last August, whea 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 

 X)ipteron. (Clemens.) 



20. Gracilaria hlandella 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 juglandinigra'ella Chambers. 



The larva at first mines the leaves beneath, afterwards feeding and 

 pupating under the turned-up edge. 



