90 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Habitat: Falls Church, Va., C. Heinrich, collector. 



Type: Cat. No. 19244, U. S. N. M. 



Foodplant: Prunus serotina. 



Exceedingly close to the type of the genus Marmara salictella 

 Clem., but with less white ornamentation of the apical parts of 

 the wing. The deeply serrated, typical larva makes long mines 

 just under the epidermis of the branches of wild cherry charac- 

 teristic of the genus. 



Argyresthia castaneella n. sp. 



Labial palpi golden white. Face and head pure white. Antennae golden 

 with brown annulations. Thorax white; base of patagia golden. Fore- 

 wings white with a broad, bright, golden, longitudinal streak along costal 

 edge, gradually widening f . om the middle of the wing into the darker, 

 golden brown apical part, which is slightly reticulated with white; at the 

 end of the cell is a darker golden brown spot, adjoining the dark costal 

 part of the wing; on the middle of the dorsal edge is a similar dark spot; 

 cilia white; forewings with veins 7~8 stalked. Hindwings dark fuscous 

 with white cilia. Abdomen dark brown above, silvery white on the under- 

 sides with golden anal tuft. Legs silvery. Alar expanse: 10 mm. 



Habitat: Falls Church, Va., May, C. Heinrich, collector; Hamp- 

 ton, N. H., June, S. A. Shaw, collector. 



Type: Cat. No. 19245, U. S. N. M. 



Very close to Argyresthia subreticulata Wlsm., but darker in 

 color and differing by the dark dorsal spot in the otherwise pure 

 white dorsal part of the wing. 



Mr. Heinrich has bred this species from the bark of chestnuts, 

 infested with Sesia castanece, Busck. 



Argyresthia franciscella n. sp. 



Labial palpi, face and head yellowish white. Antennae with white 

 basa' joint, with dark brown annulations. Thorax white. Forewings 

 pearly white, dusted with light brown; an outwardly oblique blackish 

 brown streak from basal third of dorsum is faintly continued to costal edge; 

 a similar, parallel, brown streak from just beyond the middle of dorsum 

 may likewise be faintly traced to apical third of costa, where it meets an 

 ill-defined transverse fascia from apical fourth of dorsum; apical part of 

 the wing strongly suffused with bronzy brown ; cilia white with a few irregu- 

 lar, black dashes at base. Hindwings light fuscous with whitish cilia. 

 Abdomen silvery white. Legs white with dark brown tarsal annulations. 

 Alar expanse: 10 mm. 



Habitat: San Francisco, Cal., May, E. O. Essig, Coll. 



Type: Cat, No. 19246, U. S. N. M. 



Easily distinguished from all the American brown marked spe- 

 cies of the genus by the two dorsal dark streaks. Received from 

 Mr. E. 0. Essig with the label "in tips of Cypress." 



