;{() 1 



what o(" the type ol' Fidonia and Thamnonoma rallier lliaii Acidnlia; the 



costal vein touches or nearly adjoins the first subcostal venule before it bends 



forward to the costa, or does not bend {E. hermiitiala) and goes straij^ht to 



near the apex; there is no subcostal areole in C. semiclarata (plate 3, fig 8fl); 



the second subcostal venule arises within the origin of the filth subcostal (f. 



vestaliata, ])late 3, fig. 8, and C. semidarata). Hind legs slender; liind tarsi 



nearly as long as the tibiae, which are not swollen. Tiie species are either 



snow-white or white mottled with dark brown, the wings not crossed by lines. 



This genus may be recognized by the arched costa, the rectangular apex, 



simple male antennHS, conical, untufted abdomen, and the full outer edg(! of 



the hind wings, with the apex and inner angle well marked. The species 



differ from those of Deillnia in the simple antennsB and the want of lines. 



The venation differs somewhat in the two species; the second subcostal 



venule arising close to the origin of the fifth subcostal, while in vestaliata it 



arises midway between it and the first; the posterior discal is very oblique in 



vestaliata, straight in se7niclarata ; in one O. vestaliata, the fifth subcostal vein 



is entirely wanting!. I doubt whether Walker's Corycia hexaspilata is a 



Corycia at all. 



Synopsis of Species. 



Small, pure white; frout entirely white; costa of fore wings bene.atli, smoky C. veKtaliala. 



Discolored with dark brown, and with four discal spots C. semidarata. 



Corycia vestaliata Guenee. Plate 10, fig. 23. 



Corycia rmtaUaia Ouen.!, Phal., ii, 59, 1857. 



Walk., List Lep. Het. Br. Mu8., xxiii, 873, 186L 

 Acidalia jimctaria Walk. ! ! ! , Can. Nat., vi, 39, 18C1 ; List Lep. Het. Br. Mus., xxvi, 1.^93, 1H61 ifide Grote). 



10 S and 10 9. — Fore wings distinctly rectangular at tip; outer edge 

 of both wings rather fuller than in the following species; front rather longer 

 and more triangular than in the two succeeding species, and the palpi rather 

 slenderer and not extending no far out as in herriiiniata, but much as in semi- 

 darata. Snow-white, with no markings above, but irised; stained with brown 

 along the under side of the costa of fiire wings as tar as the apex (.sometimes 

 the co.sta is almost entirely white beneath); fringe long, white; front of head 

 white, palpi yellowish on the outer half; antenna^ white above, sometimes 

 brownish, yellowish beneath. Legs: fore and middle pairs wdiitish externally, 

 the femora and trochantines dusky within and beneath; hind pair white. 



Length of i)ody, <f , 0.38, 9, 0.35; of fore wings, c? , 0.41, 9, 0.42: 

 ex[)aiise of wings, 0.85-0.9.5 inch. 



