MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 75 



^DELOCEPHA-LA. BISECrA. (Liixtuei-). 



PI. XX. tii.'. i:!<j, 149. 



Aiiisola Imeda Lintxer, Can. Knt.. XI, p. 10, 1879. 



SphiiKjirampa bineiiit var. Dehulom XF.f.MOXiEX, Knt. .\nifr., VI, p. 60, 1S90. 



Sphiiifficampa bifccla Kiimx, l>yn. Cat., Lop. Het., I, i>. 740, 1892. — Neumcegen ami Dyer, .Tonrn. N. Y. Ent. Six'., 



11, p. 149, Dec, 1894. 

 Syssphinx bisecta Dy.\r, Proc. Ent. 80c., Wash., IV. ].. 428, May 13, 1901. 



Lama. 

 Jewett, H. S., Papilio. II, p. .38, Mar., 1882. 



Imago. — i Antenna? of $ with shoi'ter iind broack'r joints, and a little long-er pectinations than 

 in ..1. hicoJor ; the distal third tilifonii, and without the short vestigial pectinations of that species. 



The front of the head is a little wider than in ^1. hieolor. 



Fore wings with the costa straighter, the outer edge oblique, its course straighter, not so 

 full; hind wings shorter and rounder than in ^1. hieolor and not reaching' so near the end of the 

 abdomen as in that species. 



Body and wings rather pale in hue. ocherous; the thorax with a slight pinkish hue in the 

 middle; abdomen paler, uniform ocherous. 



Fore wings without any distinct discal spot, only a very faint oval elliptical ring. The wing 

 is inside the extraclLscal line nearly uniform ocherous, with but few dark specks or strigie, and 

 those minute and inconspicuous. Extradiscal line oblique, firm, not wavy or .sinuous, a little 

 incurved on the costal edge before reaching the apex; the line is pale brown, edged externally 

 with pink, and'the pink extends to the edge of the wing, including the fringe. 



Hind wings rounded at the apex, full on the outer edge, and rounded at the inner angle; 

 ocherous, pink toward the base and inner edge, while the costal region and the outer third or 

 fourth is ocherous. 



Under side of fore wings as above, but i)aler. th(> extradiscal oblique line is distinct and tlie 

 wing is pale ocherous within and pinkish lieyond it, the wing also is pale ocherous toward the 

 costa and pink toward the inner edge. A large difluse double smoky discal spot, not present in 

 S. hieolor. Hind wing.s pale ocherous, with coarse dark specks toward the costa, the rest of the 

 wing clear of them; outer margin ocherous, l)ecoming paler toward inner edge; a faint extradiscal 

 curved line which tends to fade out toward the inner edge. Legs dull pink red. 



9 Antenna; simple. Fore wings rounded, full, much as in A. hieolor. but more rounded on 

 outer edge; hind wings rounded at the angles and excised, costally more than in ^1. hieolor. without 

 spots and with no median band, fore wings beneath with a diffused brown discal spot. It is paler 

 ocherous, with a more distinct extradiscal line than in any other North American species. 



Expanse of fore wings, S 55 mm.; length of a fore wing, $ 26 mm.; breadth of a fore wing, 

 $ 13 nmi. ; length of hind wing, $ 17 mm.; breadth of hind wing, S 13 mm. 



Resembles in shape of wings and head the Brazilian A. xuhnngulata more than any oth(>r 

 North American sj^ecies. For the genital armature see PI. LIX, tigs. 2. 2(/. 



Var. )i<'hiiloKa. 9 . The extradiscal line very distinct, blackish Virown; discal spot prominent, 

 suffused with blackish brown grains. Hind wings of a rich yellow, with a beautiful roseate basai 

 hue, fading toward the center. 



In the NeuuKegen collection is an unnamed pair from Brazil of the size and shape of ^1. 

 iiseeta. ])ut 9 much like ^1. hieolor. It .seems to represent ^4. hieolor in .South America. 



L(irr(i.-X)v. H. S. Jewett briefly refers to the larva, as follows: "A larva found by a friend 

 (])y bushbeating) in company with hle"lor larva', having nt) silver horns, but oidy the rudiments 

 on one segment, but otherwise resembling hieolor larva .so closely that he supposed it to be only 

 hirval variation, disclosed S Animfo hiseefn Lint." Papilio II, p. 40 (footnote), 1SS2. 



(Teo(jrnphic(tl (listrihntion. — Austroriparian passing up into the Appalachian province: 

 Racine, Wis. (Hoy); Columbus, Ohio (W. N. Tallant); Kentucky (Doll); Texas (Meske, 

 Neunioegen). It has not yet been detected north of Kentucky and central Ohio (hit. 40-) nor 

 along the Atlantic coast. (See Map II.) 



