:memoirs of the national academy of sciences. 



117 



Eacle>: and C'dherouia Diux'E, Biologia Ceiitr. Amer. \a'\\. Ht-t., I, p. 169. 1SS6. 



Oemid/a BiiKMKisTEH, 1. c, ]>. 40. 1879. 



Citheronia Kirby, Syn. Cat. Lej). Het., I, p. 742. 1S92. 



Basilona Neumoegen and Dv.Mi, Jovirii. X. York Ent. Sor., II. p. lol. Dec, 1894. 



J&irfi-'.'i BEUTENMtiLLER, Bull. Aiucr. Mus. N. II., X, p. 442. 1S9S. 



BaxUona Dyar, List N. A. Lepiiinptera, p. 7ii. 1902. 



Imago. — The head ami .sliape of the front (undcnuileil) as in Citheronia. The front when 

 denuded (PI. XXXVI, fig. -i) distinctly triangular, widening- toward the vertex; eyes lai'ge and full. 

 Antenna? pectinated to the outer third, more widely hipectinated, and with a much larger numl)er 

 (25) of double pair.s of pectinations than in Citheronia (IS): in 9 .simple, with minute vestigial 

 pectinations, not so long and distinc-t as in Citheronia. Palpi very small and short, difficult to 

 .see, not reaching the front: when denuded seen to l>t^ without a third joint, the si^cond Iteing 



Fig. 14. Nomenclature and 



m\sf:rUilh 



obtuse at the end and a little longer than the biisal one (tig. 11). Ma.xilhe wh»Mi unrolled nearly 

 as lo|ig as the front of the head is wide (tig. -1). very slcndei- and longer than in Cithei-onia. 

 Thorax and abdomen .stout, sphingiform. 



Fore wings wide, the costal edge more arched toward the apex, which is s(|uarisli. subacute; 

 outer edge less oblique than in Citheronia, much shorter than the inner edge. Hind wings 

 more rounded, the outer edge very full and rounded, and the wings extend to the end of the 

 abdomen. In the $ the w-ings are broader, those of the hinder pair extending beyond the end 

 of the abdomen. 



Venation (tig. \\): Vein IIL (second subcostal) wanting, while in Citheronia it is present: \'ein 

 IVj does not arise as in Citheronia part way, usually about halfway, between the anterioi- discal 

 vein and the origin of III^, but at the outer end of the discal cell, directly in front of the discal 



