388 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXV. 



at base, tips of scales shaded with gray brown. Antenna, stalk cream 

 fawn, annulated with light brown, branches black, cilia whitish gray. 

 Thorax light fawn, speckled with brown, shading into a whitish pos- 

 terior patch. Abdomen pale fawn, ringed above with brown on four 

 anterior segments and with dark gray on three posterior segments. 

 Leg- pale fawn, finely dusted with brown. 



Male fore wing, pale fawn, heavily dusted with brown; the ground 

 color below costa on inner third of wing and over upper and lower 

 median veins is of an ochreons shade. Terminal line nearly obsolete, 

 only showing faintly in one specimen; it is outwardly concave op- 

 posite end of cell and sharply dentate above dorsal margin. One 

 specimen has a thin, straight white line through middle of cell: this 

 specimen is of a general darker grayish brown shade, and quite 

 heavily overlaid with white scales on the dorsal margin and outer 

 half of wing. The subterminal line is only faintly indicated by a 

 few darker scales on dorsal half. There is a black dot at end of each 



vein in termen. Cilia brownish 

 gray, divided by a pale line. 



Hind wing pale fuscous gray, 

 slightly darker before termen and 

 apex. Cilia whitish, preceded by a 

 darker line; underside the same. 

 Underside fore wing brownish gray. 

 Described from fourteen males 

 and two females collected at Ros- 

 trevor, Ontario, Canada. September 

 2-16, by Mr. Arthur Gibson, in 

 wdiose honor the species is named. 

 The females are of a much lighter 

 color than the nudes, caused by the absence of the heavy fuscous 

 brown sprinkling. The fore wings are also more elongate and 

 rounded at the apex and anal angle than the male; the female hind 

 wing is whiter. 



Cotype.— Cat. No. ll!>:.s. (".S.X.M., Mr. Gibson's and the Author's 

 collections. 



THAUMATOPIS ATOMOSELLA, new species. 



Expanse, 27 30 mm. 



Male antenna, unipectinate, branches four to five times width of 

 stalk, shortly ciliated on each side of branches. Labial palpi slender, 

 scales closely appressed, about six times as long as width of eye; 

 terminal joint drooping. Head light ochreous cream color, thorax 

 a whiter shade: stalk of antenna white, branches dark fuscous brown, 

 cilia whitish: labial palpi cream ochreous. thickly speckled with dark 

 fuscous and lightly sprinkled with white: maxillary palpi cream 





Fig. 8. — Head and enlarged antenna 

 of Thaumatopsis gibsonella 





