W. 1). KEARFOTT. 39 



T. essexana. Kearf. J- — Forewing: inner third brownish ochreous, outer 

 third darker brown, ciliate edge gray, ocellus much more distinct than in rudia- 

 tana. 



Hindwiug: reddish-brown, lighter and brighter than radiafana. 



T. unibrastriana Kearf. 9-— F^rcwing: lighter ochreous-brown than 

 either of the above two, cilia ochreous. 

 Hind wing : as dark as radiatana. 



T. rosieoteriiiiiiana Kearf. 9- — Forewing: darker than Mjnftri.s/riana. 

 Hind wing: darker, cilia more ochreous. 



T. aweineana Kearf. 9.— Forewing: very much like % formosana. 

 Hind wing: darker than any of the preceding, cilia whitish. 



T. ferr II gin an a Fern. 9- — Forewing and hindwing: very little different 

 from its male. 



T. aspidiscana Hbn. 9-— Forewing: like the male, hindwing much 

 darker. 



The most common mi-stake in identification has been to name all 

 of the pale fawn or straw-colored males as radiatana and all of the 

 reddish females as ferruginana, notwithstanding they are nearly 

 double the size of the latter ; and sometimes the females of radiatana 

 have been named as female formosana. Formosana, in its turn, or? 

 more frequently, the males, are usually named aspidiscana. 



Thiodia essexana sp. nov. 



%, . — Expanse 20-26 mm. 



Head and palpi speckled gray, latter palei' internally ; thorax pale straw, with 

 brown central and lateral streaks, patagia brown ; antenna light grayish fuscous ; 

 abdomen fuscous, anal tuft paler; legs ochreous-gray, dusted with brown. 



Forewing: bleached straw color, with a brown streak from base near dorsum 

 to outer margin, it spreads there and circles the ocellus on its outer and lower 

 edge, terminating in a large spot on dorsum before ocellus; from its outer end a 

 spur goes up into apex. The ocellus is nearly round, and its pale straw color, 

 well defined by the brown which surrounds it on all sides, except a small distance 

 on its inner edge, where it connects with the same shade of the lower third of 

 wing; the scales on the sides of the ocellic spot are slightly shining, and it is 

 shaded with slightly darker scales over the veins which are beneath it. The 

 outer two-fifths of costa contains three light brown dashes, outlined by paler, 

 somewhat shining straw color lines, running together in a line parallel to costa, 

 and concave above the ocellic spot. Cilia shining leaden-gray, with an internal 

 line speckled fuscous and gray. 



Hindwing: grayish-fuscous, darker around edges, cilia whitish-fuscous, with 

 a dark basal line and a darker intermediate line ; underside: ochreous- fuscous, 

 dashes Below costa and terminal line. 



Underside forewing: coppery-fuscous, fawn along costa and gray along termen, 

 straw color below fold. 



TBANS. AM. ENT. SOC. XXXIII. FEBRUARY, 1907. 



