MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 141 



Pupa. — The (.'hrv.salis is, iiccordiiig to Buniieister, iniich like thiit of E. Imperialism but it is 

 less tiian half as large and the spines on the surface of the l)0(ly are tiner. 

 Geographical disfrihutiou. —Bvazil (Boisduval, Burmeistcr). 

 Food 2)lant. — Not mentioned by Burmeister. 



CITHEROIN^I^V PHOKONTG^ (Crairiei-). 



Phal^enn-Attdoi^ phoronea Cramer, Papillons Exot., Ill, p. 77-78, Taf. 239, A-C. (1780?), 1782. 



I'halwna-Alhiri,^ l,i,ir,,nn Dhury, Illustrations Exot. Ent. Ill, Tab. 3, tig. 1, ?. 1780. No. 1601. 



CHInr,',,!,! i,hnn.,n,i Ih-EBNER, Verz. bekannt. Schmett., p. 153. 1818-1822. 



Cossn.-i hiijcuvn. \Ve.st\vood edit. Drury, Illustr. Exot. Ent., Ill, p. 3, PI. 3, fig. 1, ?. 1837. 



Eades phoronea Walker, Cat. Lep. Het. Br. Mus., VI, p. 1375. 1855. 



Citheronia phoronea Grote and Robinson, Annals L}'ceum Nat. Hist., VIII, p. 30, 36. Oct., 1866. 



Ceratocampa phoronea Boisduv.\l, Annales Soc. Ent. France (4), VIII, (i. 310. 1868.— Birmeister, Descr. 



Pliys. K(5publique Argentine. Larva, Atlas, p. 44, PI. xix, fig. 1. I871t. 

 Citheronia phoronea Kirby, Syn. Cat. Lep. Het, I, p. 743. 1892. 

 Citheronia aroa ^cnxis, Journ. N. Y. Ent. Soc, IV, p. 59 ( <J ). June, 1896. 



Laria. 



PI. XVI, fig. 1. 



Biirnieixtn; H., Des^cr. Phys. Rep. Argentine, p. 44. Atlas, p. 44, PL xix, tig. 1. 1879. 



[mail". — Boisduval describes the female as resembling 0. i.rion, hut of larger size. Its fore 

 wings are reddish brown, becoming violaceous toward the apex and on the costa; di.scal .spot large, 

 yellowish gray, marked with four small blackish spots, and beyond an oblique transverse band 

 formed of clouded yellow spots, the two anterior of which are larger and oval. Beyond on the 

 violaceous margin is a zigzag yellowish line, and at the base of the wing a bright yellow spot. 

 The hind wings are reddish, tinged with violaceous, with the costal edge marked with yellowish, 

 an anal spot, and a submarginal sinuous clear yellow line. The thorax is yellow, with the collar 

 and a broad median spot of a violet-brown. Abdomen rust red, with yellow wings. The male 

 is smaller, and only differs in the hind wings being yellow with a ferruginous band, and a trans- 

 verse wavy violet-brown line. This .species is very rare in our collections. 



The following description is drawn up from a S in the Neumoegen collection of the Brooklyn 

 In.stitute: 



It ditiers from C. laocoon {€'. ixion) in the much longer and sharper fore wings, the 

 outer edge of which is much more obli([ue. The hind wings are not quite .so rounded at the 

 apex. The coloration is very diti'erent and the head and thorax are dark red-brown, as on the 

 fore wings; patagia pale ocherous, extending on the fore wings along the axillary vein (VI); a 

 curved di.scal mark situated in a large yellowish cloud; an oblique extradi.scal row of eight 

 yellow spots obscured by I'eddish brown; a submarginal irregularly scalloped line as in the female. 



Hind wings yellow-ocher and red, ocherous at base and in the middle of the hinder edge, 

 and a submarginal scalloped yellow line as in the 9 . The abdomen is ringed with yellow. 



Beneath, more yellow-ocher than above. Discal pati'hes distinct, extradiscal and su})marginal 

 lines distinct. Hind wings nearly all yellow. 



Expanse of fore wings, S ln3 nmi.; length of one fore wing, S 47 mm.; breadth of one fore 

 wing, S 20 mm.; length of a hind wing, S ^7 mm.; breadth of a hind wing, S 21mm. 



Citheronia aroa Schaus is veiy closely allied to ('. jthoroioa, ^\\(\.\ am inclined to regard 

 it as a local variety. It diHers from my Rio 9 specimens, judging bv Druce's figure, in the broad 

 extradiscal ocher l)and being in the middle and hinder part of the wings broken up into .separate 

 spots, while the hind wings have a ground color of ocherous, not brick-red as m phoroma. The 

 colors of the body are identical in the two forms. 



Larva. — Burmeister gives a figure which we copj-, and describes it as having on the tirst or 

 prothoracic segment "four" [two] large spines of a clear rose color, the two small lower ones 

 being scarcely visible. The following segments have six spines, liccoming successively smaller 

 going backward, the lateral ones each ending in a black tip bristling with short hairs; the two 



