MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 129 



Cithenmin Packari>, Proc. Ent. Soo. Phil., Ill, p. 881, Nov. 1864.— (iROTE and Rob., Proe. Ent. Soc. Pliil., 



IV, p. 222, April. 18B5; Annals Lyceum Nat. Hist. N. Y., VIII, p. 29, PI. XII, fig. 1 S- 1866. 



• Ceratucnmpa Boisduv.\l, Annales Soc. Ent. France (4""= ser. ), VIII, p. 310. 1868. — Bur.meister, De.scr. Phy.s. 

 Kep. Argentine, V, Lej). p. 486. 1878. 



Cilheronia and Eackt^ KtRBY, Syn. Cat. Lep. Het. I, p. 742. 1892. 



Cilhcronin NErMOE<iE>j and Dyar, Jonrn. X. Y. Ent. S<ic. II, p. 150, Dec 1S94.— I>var, List Lep. N. A., p. 

 76. 1902. 



Lntigii. — Head Ijroiid in front, subtriaiigular wlien denuded; ej'es larjje and round. AntenniU 

 of $ bipectinated to a little be\'ond the middle; the pectination.s .shorter, stouter, and more 

 densely ciliated than in Eacles and less numerous (LS double pairs); in 9 simple, but with tine, 

 minute, vestigial pectinations, a single pair to each joint. 



Palpi stout, moderately lai'ge, slightly ascending, extending slightly or well beyond (in 

 C. sejndo'allii) the front; the third joint distinct, button-like. Maxillae minute, but distinct, 

 though ver\^ short, scai'cely reaching beyond the palpi. Thorax and body stout and heavy, 

 ■sphingiform. 



Fore wings narrow, apex prolonged, subacute; costa nearly straight to the apex, which i.s 

 subacute; outer edge very oblique, as long as the inner edge. In 9 the wings are much broader, 

 and the apex more obtuse. Hind wings rounded at the apex, but more produced in this region 

 than in Eacles, and the wing is more subtriangular. They do not extend so far toward the end 

 of the abdomen as in Eacles. Legs not so stout and thick as in Eacles, and the tibial spur of the 

 S is not quite .so broad; it is a little more than half as long as the tibia itself. 



Venation (PI. LVIII, tigs. 1. In): As will Ije seen by the figures, the venation is cjuite constant 

 in the four species examined. V(>in III., is alwa3's present, and is long and well developed; III, 

 always arises well within the outer end of the discal cell, i. e., within the di.scal veins. The latter 

 together form a less oblique line than in Eacles, and tend rather to curve in toward the cubital 

 vein ( — ); the discal cell is rather small, triangular. In the hind wings the outer end of the 

 discal cell is straighter, less oblique than in Eacles, the di.scal veins being in C. htoi-cnoa (ij-ion) 

 more oblique, and thus approaching Eacles more than the other species examined. 



Coloration: Ground color, tending to be brown-orange, orange-red on the veins, with yellow 

 .spots, or lilac-brown predominates {><ej>ulcral!s and iiie,r!can<i)\ no definite discal spots: in .some 

 .species a submarginal red or yellow zigzag line. 



Genitalia (Pis. LIX, tig. 8'/; LX, figs, i, -la-'lil): Suranal plate, narrow, style-like {I'eijdHs), 

 or broad and triangular {sej)ulc/'i(lis)\ two pairs of claspers; the lower pair distinct from the 

 upper, hook-like, curved upward, divided at the end; upper claspers, seen sidewise. large, broad, 

 oval; from above, narrow, oval, with no terminal projection or hook. Penis, style-like. 



The genital armature of the male is characterized by the broad, oval claspers. the large 

 harpcs, the short penis-guard (y/), and the long, acute penis (fig. 2J. j>.) 



Egg. — Flattened, oval cylindrical; shell thin, parchment like, obscurely and very miinitely 

 .sculptured, with hexagonal pits. (See p. 132.) 



Larm. — A pair of long dorsal prothoracic horns in addition to those on the second and thii-d 

 thoracic segments; the latter very large, usualh' longer than the bodv is thick; caudal horn long, 

 nearly half as much so as the thoracic horns; a shorter median horn on the ninth abdominal 

 segment. The other dorsal and lateral abdominal spines longer than in any other genus except 

 Adelocephala; suranal plate rugose, but not granulated, difiering in this n^spect frt)m Eacles; 

 bearing two short low stout spines one on each side of the middle. 



Young larva, before molting, with long spinous thoi'acic horns ending in bull)ous expansions, 

 bearing a lateral terminal rod on each side; the caudal horn with a similar ending; the other 

 spines long and nranching. differing from Eacles in the bulbous endings and the spinulose shafts 

 of the horns. 



Pupa. — Body very thick, rounded in front; end of abdomen very blunt, cremastcr reduced 

 to a vestige ending in two small rounded tubercles; body smooth with no spines; maxilla' long, 

 though slightly shorter than in Eacles. It should be observed that Burmeister represents the 

 pupa of C. 2>i'lneipal!H with a large, well-developed, forked cremaster. (PI. xx. fiy. <> on 

 PI. XVII.) 



