NATURAL SCIENCES OF PHILADELPHIA. 171 



L. luciferella. Head and face silvery, tinged with yellowish. Back- 

 head dark fuscous. Labial palpi silvery ; middle joint dark fuscous from the 

 base to the middle, the terminal joint with a minute fuscous dot at its base. 

 Antennae dark fuscous. Fore wings dark reddish fuscous, with a large, rather 

 faint bluish silvery patch at the base, one on the middle of the costa, and a 

 curved band near the tip of the wing, of the same hue. On the fold beneath the 

 costal patch, is a patch of raised scales, and another on the inner margin join- 

 ing the band behind. Exterior to the band the wing is touched with ochreous, 

 containing in the middle a short dark fuscous streak, sometimes a pale yel- 

 lowish white streak margined with dark fuscous, and on the costa just behind 

 it, is a short pale yellowish-white streak, margined exteriorly with dark fus- 

 cous. Apical portion of the wing is dark fuscous ; cilia of inner margin fus- 

 cous. Hind wings fuscous, cilia the same. 



Fore wings slenderly and shortly caudate at the tip. Apical vein with 

 a long fork, with an independent discal nervure beneath it. Median four- 

 branched. Submedian with a long basal fork, no apical fork, but with the 

 end of the fold thickened. Labial palpi recurved, thickened at the end of 

 second joint with loose scales ; the third rather long, smooth and pointed. 

 Tongue nearly as long as the anterior coxae. 



L. Eloisella. Head, face and thorax silvery white, the latter spotted 

 with blackish. Labial palpi white, with a dark brown spot on the middle of 

 second joint, and two dark brown rings on the third, one at the base and 

 one at the tip. Antennae tawny yellow, white at base. Fore wings silvery 

 white, with a small tuft of tawny scales at the basal third of the fold, and a 

 larger patch of the same hue on the inner margin at the end of and above the 

 fold. Between the tufts, is an oblique dark brownish costal streak, nearly 

 joined at an angle by another of the same hue in the middle of the wing and 

 exterior to the first tuft ; the fold is tinted with golden yellow. Exterior to 

 the second tuft is a blackish-brown streak, which becomes diffuse behind and 

 above, while the apical portion of the costa to the slender apex of the wing is 

 golden yellow. At the base, beneath the fold, is a blackish-brown spot, and 

 another of the same hue beneath the fold equidistant from the first and the 

 first tuft of scales, and on the costa midway between these latter is a rather 

 faint dark brownish spot. Cilia yellowish gray. Hind wings tawny-grayish, 

 cilia ochreous. 



Cheysocorys Curtis. 



C. Erythriella . Head, face and thorax fuscous, with a greenish-brassy 

 hue. Labial palpi ochreous, terminal joint fuscous. Antennae bronzy -yellow- 

 ish fuscous. Fore wings reddish-fuscous, with a greenish-brassy hue ; cilia 

 fuscous. Hind wings reddish fuscous, cilia the same. 



Specimens of this insect reared by myself were much smaller than those 

 taken on the wing, had less of the brassy hue and were nearly uniform grayish 

 fuscous, but I have no doubt it is the same insect. 



The larva feeds on the fruit racemes of Sumach. It tapers anteriorly and 

 posteriorly, incisures deep, segments elevated in the middle, with a single 

 row of transversely arranged epidermic points on each ring, each one giving rise 

 to one or two rather stiff hairs ; abdominal legs very slender and short, termi- 

 nal placed posteriorly. Head with a few hairs, ellipsoidal, pointed rather 

 small, and pale brown. The body is uniform dark green. ' Frass " scarlet. 



The cocoon was woven on the outside of the raceme. It was ovoid, and ap- 

 peared to consist of coarse silk and but a single thread, being woven so as to 

 leave large meshes, enabling one to see the pupa through it distinctly. At 

 maturity the pupa case is thrust forth. The pupa is pale green, with the 

 head-case distinctly separated from the case of the thorax. The length of the 

 larva is about two lines, of the pupa about one and a half. 



The larva may be taken in July ; the imago appears early in August and 



I860.] 



