MEMOIRS OF THE NATIONAL ACADEMY OK SCIENCES. 141 



Pitpit. — The fhrvsiilis is, accordinij to Burnicistcr, miifli like that of E. iinperlalis, but it is 

 less than half as large and the spines on the surface of the body are Oner. 

 Geographical distrihution. — Brazil (Boisduval, Burnieister). 

 Food plant. — Not in(Mition(>d l>v Bunneister. 



C'I'ri-IERO>ri^V IJHORONE^ (Crainer). 



PhaLrna-Attacus phoronca Cramer, Papillons Exot, HI, p. 77-78, Taf. 2:?9, A-C. (1780?), 1782. 



Phakifiia-Atla'ttx hioroon Dki-ry, Illustrations Exot. Ent. Ill, Tab. 3, tig. 1, J. 1780. No. 1601. 



Ciiheronia phoroiwa Hiebxer, Verz. bekannt. Scliniett., p. 153. 1818-1822. 



Cossus laomon Westwood edit. Drury, Ulustr. Exot. Ent., Ill, p. 3, PI. 3, fig. 1, J. 1837. 



Eacles j^horonea W.^lker, Cat. Lep. Het. Br. Mug., VI, p. 137.5. 18.55. 



Citheronia phoronca Grote ami I\obin.son, Annals Lj'ceum Nat. Hist., VIII, p. .30, 36. Oct., 1866. 



Ceratocanipa phoronea Boisduv.vl, Annales Soc. Ent. France (4), VIII, p. 310. 1868. — Bi'rmeister, Descr. 



Phys. Kepublique Argentine. Larva, Atlas, p. 44, PI. xix, fig. 1. 1879. 

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

 Citheronia area ScH.\es, Journ. N. Y. Ent. Soc, IV, p. .59 ( $ ). June, 1896. 



Ldnv. 



PI. XVI, fig. 1. 



Burmeister, H., Descr. Phys. Rep. Argentine, p. 44. Atlas, p. 44, PI. xix, fig. 1. 1879. 



Imago. — Boisduval describes the female as resembling C. iiuon, but of larger size. Its fore 

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

 yellowish gray, marked with four small blackish spots, and 1)eyond an oblique transverse band 

 formed of clouded ^-ellow 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 suijmarginal 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 lieing 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 

 Institute: 



It differs from C. htocoon ((.'. i.r!<in) in the much longer and sharper fore, wings, the 

 outer edge of which is much more obliciue. The hind wings are not quite so rounded at the 

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

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

 curved discal mark situated in a lai'ge yellowish cloud; an ol)lique extradiscal row of eight 

 yellow spots obscured by reddish brown; a sul)marginal irregularly scalloped line as in the female. 



Hind wings 3'ellow-ocher and red, ocherous at base and in the middle of the hinder edge, 

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



Beneath, more yellow-oeher than al)ove. Discal patches distinct, extradiscal and submarginal 

 lines distinct. Hind wings nearly all yellow. 



Expanse of fore wings, i 1(»3 mm.; length of one fore wilig, S 47 nmi.; ))readth of one fore 

 wing, S 20 mm.; length of a hind wing, $ '27 mm.; Ijreadth of a hind wing, <? lil mm. 



OitJi<rron!a aroa Schaus is veiy closely allied to ('. jdiorotita^ and I am inclined to regard 

 it as a local variety. It differs from my Rio $ specimens, judging b}' Druce's figure, in the broad 

 extradiscal ocher band 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 \i\ phi>i'(ni,,i. The 

 colors of the body are identical in the two forms. 



Larva. — Burnieister gives a iigure which we cop\-, and describes it as having on the rirst or 

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

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

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



