MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 61 



associated witli the Saturniidiv, also the Eurasian ivenus Alalia and the Indian <,'enus Salassa from 

 the Saturniidiv and associate them witii the Ceratoeampina>. 



The group, as we are now disposed to limit it, is divided into several suiidivisions of nearly 

 equal rank. 



We conclude, then, that the protosphinj^ine group for which we have retained the name 

 Ceratocampidw is represented by the following subfamilies, though wo would add that they may 

 ultimately be regarded as of family rank: 



1. C'eratocainpimt' (Adelocephala, Syssphinx, Anisota, Eacles, Citheronia). 



2. Agliinx (Arsenura, Rhescyntis, Dj'sdiemonia, Copiopteryx, Aglia, Cercophana, etc.). 



3. Bioiiviiiiv (Runtva, Lobol)una^a, Im])rasia, Gynanisa, Cirina, Usta, Nudaurelia. Anthiyiua, 

 Melanocera, Cinal)ra, Aurivillius, etc.). The genera Cjrtogoue, Eudremonia, and others appear 

 to be t3'pes of additional subfamilies. 



SYNOPSIS OF THE GENERA. 



Imago. 



S Antennie with joints 1-17 or 18 doubly pectinated; 9 antennie simply pectinated or simple; thorax full and over- 



hanginj; the head; maxilhe slightly developed; body and wings sphinx-like Adelocephala 



Head (denuded), narrower than in Adelocephela; clypeus produced into a knob-like protuberance; body and wings 



sphinx-like Syssphinx 



S Antennie with joints 1-15 doubly pectinated; in 9 simple; palpi short and feeble; maxilhc either wholly or nearly 



aborted; hind wings of $ triangular; costal edge much curved Aniaota 



$ Antenn;e broadly pectinated; fore wings wide, apex subacute; outer edge less oblique than in Citheronia; hind 



wings rounded ; palpi 2-jointed Eacles 



Fore wings subacute at tip; hind wings rounded, but apex more produced than in Eacles Citheronia 



Larva. 



Prothoracic segment with either spines or rounded tubercles; second and third thoracic dorsal and subdorsal spines 

 but little longer than those of abdominal segments 1 to 7; caudal horn long, recurved Adelocephala 



Like those of Adelocephala, but the thoracic spines and caudal horn short and conical; none on abdominal segments 

 1 to ~, Syssphinx 



No fused caudal horn; two sejiarate tubercles i jiresent on eighth abdominal segment; a median spine on segment 9; 

 body striped longitudinally Anisota 



Spines short and stout; no long prothoracic spines Eacles 



Spines all very long; long prothoracic horns Citheronia 



Pupa. 



A. !Maxill« very short, the two together scarcely longer than broad. 



Cremaster very long, deeply forked; surface rugose Adelocephala 



Cremaster very long, deeply forked; surface smoother Anisota 



B. Maxilla? long. 



A long stout cremaster Eacles 



Cremaster vestigial, reduced to a small bilobed tubercle, shorter than broad Citheronia 



Habits. — Pupa subterranean; the larva spinning no cocoon. 



Geographical didrihution. — Contined to Neoga?a, from which a few species have migra^d 

 into eastern America north of Mexico, and east of longitude 100. (See tig. 6 and maps I-IX.) 



ADKLOCEPHALA. Heri-ioh-SchaefFer. 



Plate XIX, etc. 



Dryocampa Harris, Rep. ins. Mass., p. 293. 1841. 



Sphliigirampa Walsh, Proc. Bost. Soc. Nat. Hist. IX, p. 290. 1864. 



ylcWoeeyj/iafa Herr.-Schaeffer, Aussereurop. Schmett. I, pp. 60, 78. 1855. (Nodescr. ) 



Othorene Boisdcval, ,\nnales Soc. Ent. Belgique, XV, p. 82. 1872. 



Adelocephala Boisov\ Ah, Annales Soc. Ent. Belgique, XV, p. 85. 1872. 



Jewett, Papilio, II, p. 38. March, 1882. 



KiRBV, Syn. Cat. Lep. Het., I, p. 741. 1892. 



Druce, Biologia Centr. Amer. Lep. Het., I, p. 170. 1885. 

 Sphingicampia Kirby, Syn. Cat. Lep. Het., I, p. 740. 1892. 



Neumogen and Dyer, Journ. N. Y. Ent. Soc, II, p. 148. Dec, 1894. 

 Adelocephala and Sy»s])hin.v (in part) Dver, Proc. Ent. Soc. Wash., IV, p. 427. May 13, 1901. 



