140 MExMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



CirilElKO^ri^ PRINCIPALIS ("Walkei). 



PL XIX, fig. 8 9. 



Eacles principalis Walker, Cat. Lep. Het. Br. Mus., VI, No. 8, p. 1376. 1855. 

 Ceratocampa principalis BoiSDrvAL, Annales Sor. Ent. France (4), VIII, p. 316. 1868. 



Citheroniii principidis Kikby, Syn. Cat. Lep. Het., I, p. 742. 1892. 



Larm. 



PI. XVII, litr. 4. 



Bimdnral, J. A., Annales Soc. Ent. France (4), VIII, j.. :!17. 1868. 



fSunneisler, Descr. Rep. Ai-gentine, L^p., Atla.?, PI. xx. lit,'. 4. pa|)a, tig. 6. 1879. 



Iiantjo. — 1 9 . Thorax, abdomen, and wiiig.s tawny or reddish orange-brown; tufts at the 

 base of the antennie, and two on top of the metathorax, ocher in color, a.s also two yellow spots 

 at the ba.se of the fore wings, one on the costal edge and the other at the ba.se of the cubitus 

 (Vein IV). Fore wings with the basal line distinct, situated much nearer the discal mark than the 

 base of the wing; it is dislocated on the cubitus or median vein, where it makes a right angle, and 

 extends to the costa, being parallel with the costal mark; it is brown, shadetl diffusely within with 

 gray. Discal mark a long, narrow, straight .streak, gra\', within edged with dark brown. A 

 distinct obliciue, tirm, not wav\y, extradiscal line extending from the outer third of the inner 

 edge to the outer sixtli of the costal edge; it is brown, edged externally with gray. On the 

 inside of the line is a row of five roundish spots; the two nearest the costa obscure deep orange; 

 the two next in the extradiscal cell and the other in the cell behind are hyaline, with a few 

 yellow .scales scattered over the surface and on the edges; the anterior one is roundish, the other 

 triangular; the anterior spot is about halfway between the discal mark and the outer edge. 

 Between the extradiscal line and the outer edge of the wing are two alternating rows of deep 

 orange-red irregular blotches. Fringe of both wings reddish brown. 



Hind wings like the anterior ones in color and marking, with no yellow, basal ami cxti-adiscal 

 lines as on fore wings, discal mark as on fore wings, and the two alternating rows of orange spots 

 ar(> present. 



Under side of wings paler, reddish brown; no distinct discal marks on the wings of either 

 pair; l)asal line wanting, but the extradi.scal forming a brown shade. The five spots within it 

 nearly as above, including two hyaline spots. The submarginal alternating rows of spots are 

 represented by a very irregular, zigzag brown line, edged within with dull yellow ocher on both 

 pairs of wings. For the venation .see PI. LVIII, figs. 3, 3f/. 



Expan.se of the fore w'ings, 9 114 mm.; length of one fore wing, 9 tliiuun.; breadtli of one 

 fore wing, 9 31nmi.; length of hind wing, 9 40 mm.; breadth of hind wing, 9 oO mm. 



This is a large .species with the fore wings narrower, more elongated, and pointed at the 

 apex thar; in C. phoronea var. There are no yellow spots on the wings; the hind wings are more 

 produced toward the apex. My specimen was compared with Walker's type in the British 

 Museutn., exactly agreeing with it. 



Fjiij, — The ^^^^^ taken from tlic alidomcn of a dried 9 are of the same shape, the shell 

 similar, witli apparently the same style of sculpturing as that of (\ r<(ialiK. The Qi^g only 

 differ.- in its smaller size. Length, 2.4 mm.; breadth, 2 nun. 



L'irrd. — Fig. 4. Arm(>d uitli six rows of spines, of which four on the second and third seg- 

 ments ai-e much longer than the others and curved backward; that on the eiglith abdominal 

 segment longer than the others, and like a (jueue. The prothoracic segment witli six spines, of 

 which the median two are half longer than the others (Boisduval). 



Judging by Burmeister's figure, it differs from the larva of C phoronea in the four dor.sal 

 thoracic spines being shorter, more pointed, while the dorsal and other abdoutinal spines are 

 longer than in that species. Moreover, it differs fi'om all the other species in the body lieing 

 barred ol)li(|uely, as in Sphinx larvie, with .seven stripes on each side, the upper part of each l)ar 

 being edged with brown. Anal legs and suruna! j)lnte \<'rv spiny. 



