no. i. BOMBYCLNE MOTHS OF NORTH AMERICA— PACKARD. 85 



DIRPHIA SEMIROSEA Walker. 



Plate LIII, fig. 4. 



Dirphia semirosea Walker, Cat. Lep. Het. Br. Mus. [VI (1855), p. 1359]. 

 [Ormiscodes semirosea] Ktrby, Syn. Cat. Lep. Het., I, p. [790]. 



Imago. — One 9 . Palpi projecting a little beyond the front. Fore wings intermediate 

 in shape between D. speciosa and hoegei, not so broad and rather longer and more pointed at 

 the apex than the latter. Thorax rough and shaggy, chestnut brown, with long erect irregular 

 whitish thickened scales which are hairlike and not decidedly flattened or paddle-shaped as 

 in those of D. hoegei. 



Wings very broad, the ground color chestnut brown, with a rosy tinge all over them. Fore 

 wings with a basal line composed of an oblique heavy white spot, succeeded by several venular 

 white spots, the line being situated half way between the base of the wing and the discal veins 

 Extradiscal line white, accentuated on the veins and costa, not wavy or entirely straight, and 

 curved outward on vein II 3 -II 5 . Half way between this line and the outer edge of the wing 

 is a broad diffuse dark chestnut brown shade, more or less interrupted and scalloped on the 

 outer edge. No discal discoloration. 



Hind wings roseate chestnut, of nearly the same hue as in the fore wings. No discal spot 

 or basal line. Two parallel extradiscal dark chestnut shades, the inner one becoming white 

 on the costa; the outer one the broader, and widest on the hinder portion of the wing. Two 

 pink bands extend across the back of the thorax. 



Abdomen dark reddish brown, and with six bright pink rose bands; along the middle of 

 the under side is a uniform brown area. 



Beneath, fore wings with no basal line or discal mark except a faint linear light spot: the 

 extradiscal line is partially reproduced. 



Expanse of fore wings, 9 75 mm. 

 Length of fore wing, $ 38 mm. 

 Breadth of fore wing, 9 19 mm. 

 Length of hind wing, 9 28 mm. 

 Breadth of hind wing, 9 20 mm. 



This species may be recognized by the beautiful roseate bands at the base of thorax and 

 on the abdomen; also by the interrupted white basal and extradiscal lines on the fore wings. 



Compared with Walker's type in the British Museum, the duplicate presented by that 

 museum. 



Geographical distribution. — "Costa Rica, Mexico." (British Museum.) 



DIRPHIA HOEGEI Druce. 



Plate LIII, fig. 1; CXII, fig. d. 



Dirphia hoegei Druce [Biol. Centr. Amer. Lep. Het., I (1886), p. 194, pi. 20, f. 10, 11]. 

 [Ormiscodes hoegei] Kirby, Syn. Cat. Lep. Het., I, p. [790]. 



Imago. — One 6* , one 9 • Wings broader, hind wings longer and reaching farther beyond 

 the end of the abdomen than in the two other species known to me. Body, head in front, 

 breast and femora reddish brown. Palpi short, black, not reaching to the front. Thorax 

 bristling on the back with erect stiff yellowish paddle-shaped flattened hairs. 



Fore wings broader than usual, costa a little more curved than in D. semirosea, apex rect- 

 angular, hind wings wide, with the outer edge full and convex. Wings ruddy chestnut brown, 

 9 more reddish than s . Fore wings with a basal line of three or four white spots, that in the 

 costa large, wide, and oblique; one situated on vein IV linear and one on vein VII. Discal spot 

 a double dark spot, diffuse and obscure. Extradiscal line white, a little sinuous, widening on 

 the costa, wider in s than 9 , and in o" tending to become broken up into venular spots. 

 Hind wings with no markings, but the very faint extradiscal line becoming whitish on the costa, 

 and a faint submarginal irregular diffuse whitish ( ?) scalloped shape. Wings beneath of the 

 same hue as above, dark, though a little paler; the extradiscal line common to both wings is 

 scalloped and quite distinct, and the discal, linear marks are present in both wings. 



