132 PAPERS BY DR. B. CLEMENS. 



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. 



Chrysocorys, Curtis. 



'VfeVi ;' C. Erythriella.* Head, face and thorax fuscous, with a 

 greenish-brassy hue. Labial palpi ochreous, terminal joint 

 fuscous. Antennas bronzy-yellowish 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 joints on each ring, each one giving rise to one or 

 two rather stiff hairs ; abdominal legs very slender and short, 

 terminal placed posteriorly. Head with a few hairs, ellip- 

 soidal, 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 appeared to consist of coarse silk and but a 

 single thread, being woven so as to leave large meshes, en- 

 abling 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. 



» Of this I received two specimens from Dr. Clemens; it is closely allied to 

 our C. festaliella. The exp. al. is 4 \ — 5 lines. H. T. S. 



