210 PROCEEDINGS OF THE ACADEMY OP 



off quite near the base of the wing a long marginal branch, and near its end, 

 two other branches to the costa.. From the acute apex of the disk arises the 

 apical branch, which, near its origin sends a branch to the costa, and about 

 its middle becomes bifid, sending one branch to the costa near the tip, and 

 the other to the inner margin beneath it. The median is three-branched, the 

 posterior vein arising somewhat interiorly to the costal origin of the second 

 marginal, and is most distinct on the inner margin, being faintly indicated from 

 its middle to its origin. 



Hind wings very narrow, almost setiform. The disk unclosed. The costal 

 nervure is well indicated and long, reaching almost to the tip of the wing. 

 The subcostal is furcate beyond the middle of the wing and is attenuated to- 

 ward the base almost from its bifurcation ; it runs close to the costal trunk. 

 The median nervure is furcate within the middle of the wing, on the inner 

 margin. 



Head with long, loose scales above, forming a slight tuft between the an- 

 tennae. Forehead rounded. Face narrow and short, somewhat retreating and 

 smooth. No ocelli. Eyes small, round, salient and naked. Labial palpi 

 moderately long, slender, smooth, pointed and drooping, (in the living insect 

 most probably ascending) ; second joint slightly thickened at its end. Max- 

 illary palpi not perceptible. Antennae inserted on the front ; filiform and sim- 

 ple ; basal joint scarcely thicker than the stalk and short ; nearly as long as 

 the fore wings. Tongue naked, slender, nearly as long as the thorax beneath. 



P. lespedezsefoliella. Head and face white. Labial palpi, second 

 joint dark fuscous, the third white. Antenna? dark grayish fuscous. Thorax 

 blackish brown. Fore wings blackish brown, with three silvery white spots 

 along the inner margin, one almost at the base of the wing, one at the apical 

 third, and the other intermediate between them. On the costa are two silvery 

 white spots, the first a little exterior to the second dorsal ; the second costal 

 opposite the third dorsal. Along the hinder margin is a black hinder margi- 

 nal line, or two decided converging black streaks, one from the costa and the 

 other from the inner margin, meeting at the tip where there is a small silvery 

 white spot. The cilia along the hinder margin are silvery white tipped with 

 blackish, and along the inner margin dark gray. Hind wings dark fuscous, 

 cilia the same. 



The larva mines the leaves of bush-clover, (Lespedeza violacea) early in 

 September. It makes a whitish blotch mine, with a number of narrow, lat- 

 eral mines, or rather wide galleries running out from it, on the upper surface 

 of the leaf. The blotch is chiefly in the middle of the leaf, the larva mining 

 along the midrib in the first instance, and when disturbed it conceals itself 

 by retreating to the midrib, and applies itself along the course of it. Hence 

 tenanted mines may easily be mistaken for deserted ones. The mine never 

 contains " frass," and the larva seems to leave one capriciously, whilst it is 

 yet small in extent, to form a new one ; this it does by penetrating the under 

 cuticle of the leaf. In the course of larval life, many new mines are formed 

 and the insect is a troublesome one to breed. The larva is cylindrical, slightly 

 tapering from the first segment, and the body bright, concolorous green. It 

 deserts its food-plant about the middle of September to form its cocoonet ; 

 this is woven upon some substance on the ground, in the vivarium, in a pucker 

 on a leaf, or under a turned-down portion of the edge, and is white. It appears 

 as an imago early in May. 



I have no good description of this larva in my notes, but have of another 

 having precisely similar habits, and in appearance very like it. It mines a 

 species of Desmodium plants, nearly related to Lespedeza, and is probably the 

 same insect, or at least of the same genus as the above. The body of this 

 larva tapers posteriorly; it is submoniliform and slightly flattened, with the 

 segments roundly mammillated on the sides. The feet are three, the abdomi- 

 nal three and the terminal one pair. The head is pale brown ; the body 



[June,, 



