56 



MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



The subcostal vein of the hind wings unites with the first radial branch to form a single vein 

 («c-[-?"i). The short spur froui the subcostal of the hind wings is shown by Enderlein to be the 

 costal vein. I may say that I had supposed that this short spur might possibly be the costal, 

 but Enderlein has now proved it to be such. All the cross veins, according to Enderlein. mor- 

 phologically (genetically) should be regarded as longitudinal veins. He also shows that the 

 enlargement of the wing takes place onto- and phylogenetically chiefly in the middle zone of the 

 pupal or rudimentarj- wing. 



The numbering of the veins, then, in this and the following parts of this monograph will be 

 according to the system of Redtenbacher, Corastock, and Needham as modiiied by Enderlein, and 

 it is to be hoped that this system will be generally adopted by lepidopterists. 



costa 



Fig. 5. Nomenclature and numbering of the veins of the fore and hind wings i)f Eades intprriaUs. 



XVII. CLASSIFICATION AND LIFE HISTORIES OF THE CERATOCAMPIN.ffi. 

 Family CERATOCAMPID^ Harris (enlarged). 



Satumiidu; auct. in part. 



Ceratocampidn' Harris, Report insects inj. veg. Mass., p. 287. 1841. 

 Ceratocampadii' Packard, Proc. Ent. Soc. Phil. Ill, p 381. Nov,, 1864. 

 Ceratocampid.r Kirby, Syn. Cat. Lep, Het. I, p. 739. 1892. 



Neimocgen and Uyar, Journ. N. Y. Ent. Soc. II, p. 147. Dec, 1894. 

 Cithi-roniidiv Dyar, Journ. N. Y. Ent. See. II, p. 174. Dec, 1894. 

 Sphingicamjnda: Packard, Psyche, p. 280. Dec, 1901. 



Family Characters. — Head .small, but larger than in the Saturniida?, not prominent; inAdelo- 

 cephala, nearly concealed from above l)y the overhanging thora.x. Front of the head either 

 distinctly triangular in the most typical forms (Adelocephala, Syssphinx. Eacles) or very narrow 

 (Arsenura), or moderately wide, with a vestiture either closely cropped, or shaggy, or with the 

 hairs long, uneven, and partly shading the eyes. When denuded, the front is formed by 



