ME:\IOmS OF THE :n^atioxal academy of sciei^ces. 
47 ' 
The iN'otodontklie of i^ortli America are in this Avork divided into seven subfamilies 5 of these- 
the GluphisimVj FygcvrinWy Ichthj/iirhuVy and N'otodonUnw occur both in Eurasia and iN'orth America, 
■while two of the seven, the Apatelodincv and HeterocampiniVy are peculiar to ^Torth America, and 
extend through Central into the eastern forest-clad tropical region of South America. 
Genera common to Eurasia and Xorth America, 
Lophopteryx. 
Gluphisia. 
Ichthyura. 
Lophodonta. 
Drymonia. 
Pheosia. 
Notodonta. 
^^erice. (China and Nepaul.) 
Cerura. 
Genera peculiar to Eorth A merica. 
Apatelodes. Ilyparpax. 
Datana. Euhyx)ari)ax. 
Nadata. Xylinodes. 
Ellida. Schizura. 
Dasylophia. Seirodonta. 
Symmerista. Heterocampa. 
Macrurocamx)a. 
Of this assemblage several genera extend into Central and South America (the Brazilian 
subregion), and, besides those enumerated, Xadata, Hy^jarpax, and Schizura will j)erhaps eventu- 
ally be found to exist in the Brazilian subregions. I have included Apatelodes, as it is so closely 
allied to Parathyius, and may be found to be identical Avith it. Cerura is of doubtful occurrence 
in South America. 
Genera common to No7:th and South America, 
Apatelodes. Heterocampa. 
Dasyloi^hia. Macrurocampa. 
Symmerista. 
It appears from these facts that our Xotodontians have originated in Xorth America, the 
species of those genera ranging into tropical South America having perhaps migrated from the 
northAvard, and their ancestors may have formed the Xotodontian fauna of Miocene and Pliocene 
Xorth America. 
Within the limits of the United States there are profound differences in the Arid Plateau 
province and the humid or eastern lu'ovince. 
American genera not occurring in the Campestrian subprovinccy including the Pacific Coast district 
{south of Oregon), 
Apatelodes. 
Datana (only 1 species). 
Lophodonta. 
Drymonia (occurs in Colorado). 
Ellida. 
Xerice. 
Dasylophia. 
Symmerista. 
Hyparpax. 
Xylinodes. 
Seirodonta. 
Heterocami)a. (Except H. plumosafrom 
Arizona.) 
Macrurocampa. 
Excepting three species of Schizura and Euhj^parpax, the entire group of Heterocampime 
is wanting in AA^estern America, and it is significant that the Heterocampime are entirely wanting 
in the Old AVorld, as is also the groui) Apatelodinw. 
Xow, confining our attention to the United States and British America, we will give a tabular 
view of the species of the forest-clad, humid, uoitheastern portion of Xorth America, adding in 
a parenthesis after the name of each species either (1) for the Appalachian subproviuce or (2) 
showing its residence in the Austroriparian subproviuce. Where a species ranges through both 
subprovinces both numbers are inserted. 
