MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 77 



diioed. outer odofo full: tho wiii<rs not i-oachint,' to the end of the abdomen in eitlier sex, though 

 near it. 



Fore wings lemon-oehcrous in S , darker, vvith an olive tint in 9 ; basal line broad, very 

 distinct, snow white, nuich eiirved, beginning not on the inner edge, (tut at a point Ijctween that 

 and the costal edge of the wing and sweeping around so as to end on the co.sta a little before the 

 middle of the wing, and nearly touching the extradisoal line between veins IV and VI. Extra- 

 discal line snow white, broad, a little sinuous, extending from a point inside of the middle of the 

 inner edge to the apex, or nearer to it than in any other species. A small white discal dot. 

 Fringe, white. 



Hind wings pale roseate in S , with the outer edge lemon-ocherous; fringe luteous or clay- 

 gray. In 9 the entire wing is uniformly deep roseate and the fringe is white. A very slight 

 diffuse, dusky, discal discoloi-ation. Extradiscal line curved, diftuse, arising on the middle of 

 the outer edge and ending before the apex. 



Under side of fore wings paler than above, with a more faded appearan e; no lines except faint 

 indications; an irregular, squarish, smoky, dark discal spot. Hind wings of the same hue with 

 an irregular oval dark discal spot a little smaller than that on the fore wings. Underside of 9 

 whitish gray, washed with pink in the middle of the wings. A large diffuse blackish irregular 

 discal spot. Hind wings the same, but the costal edge whitish, and discal discoloration smaller 

 than on fore wing. Extradiscal line whitish, quite indistinct. 



Abdomen lemon-yellow in <? , in 9 dull grayish pink, though lemon-yellow at base. Legs: 

 femora and tarsi grayish: a little dusky in 9 . Tiinal sack dark, leaf-shaped, acute, one-half as 

 long as the tibia itself, covered externally with hair-like scales. 



Expanse of wings, S , 70 mm.; 9 , To mm. Length of a fore wing, ,? , 40 nuii. ; 9 , 38 mm. 

 Breadth of a fore wing, ,?,19mm.; 9,19 mm. Length of a hind wing, S 24: mm.; 9 25 mm. 

 Breadth of a hind wing, S , 19 nmi. ; 9 20 mm. 



A very gaudily marked and striking moth; tiie white lines on the thorax and fore wings 

 and the white fringe rendering it a very conspicuous and handsome insect. 



Geogi'dphleal dhtr'ihutlon. — Thus far only known from the eastern tropical coast belt of 

 Mexico. Jalapa, Mexico (O. T. Barrett, H. Edwards); Oaxaca (Boisduval); City of Mexico, 

 (Hoge); Oaxaca, "apparentlj^ rare" (Druce). 



j^DELOCEPHA-L^ ^MO^rXEZXTMA. sp. nov. 

 (PI. XIX, % 6; XXXVII, figs, 'i, Za; LXI, fig. 3.) 



This is perhaps the lai'gest and finest species yet known from Central America. 



LiKKjo. — 2 S . This species is \ev\ near the Brazilian S. faUd.v S , but differs in the discal 

 spot being small, white, and in the presence of an extradiscal line on the hind wings, while the 

 extradi.scal line on the fore wings is not slightly curved, but straight in its course; otherwise 

 the ligure represents very well my .specimen. It is smaller than S. Jason, which has a brown 

 discal streak. The scalloped outer edge of the hind wings indicates that the species has undergone 

 a considerable degree of specialization. 



Body and wings of a rich deep reddish-orange _vellow, less ocherous than usual in the genus. 

 Head with the front triangular, narrowing rapidly toward the labrum. Eyes rather large. The 

 shape of the head and wings almost exactly as in A. -mbangulata, but in the undenuded example I 

 can see no niaxilkv or labial palpi. The abdomen is pointed at the tip and with a lateral tuft on 

 each side just before the end, much as in A. sulanyulata. The central disk of the thorax is 

 ocherous, the edge of the tegulsB pinkish. 



Fore wings with the costa straight, a little curved toward the apex, which is sharper than 

 usual; outer edge .' traight, not convex, oblique, and verj' slightl}- scalloped; outer edge of the 

 same length as the inner. (In A. Kulxingulata the outer edge is decidedly shorter than in the 

 present species.) Base of wing on the hinder half pink within the basal line. This line is oblique, 

 but not curved or sinuous. The extradiscal line arises well be3-ond the middle of the inner edge 



