112 Journal New York Ent. Soc. [Vol. ii. 



Family NOTODONTID.-?^:.* 



SynoJ^sis of subfamilies and genera. 



Outer margin of primaries excavate below apex; accessory cell on a 



long stalk Apatelodinae. 



Outer margin entire, or at most moderately excavate between the 

 termination of the nervules. 

 Antennae of cf bipectinated to the tip or simple . . Notodoiltinae. 



Antennas of (^ with distinct pectinations. 

 Primaries with an accessory cell. 



A tufted tooth on internal margin of primaries . . Notodonta. 

 Internal margin entire. 



Pectinations of antenna; long. 



Thorax with large cential tuft ..... Nadata. 



Thorax untufted Hyparpax. 



Pectinations moderate or short. 



Costa of primaries straight, apex rectangular . Symmerista. 

 Costa convex, apex rounded ..... Nerice. 

 Primaries without accessory cell. (Rarely a small one in one Centra.) 

 Internal margin entire. 

 Vein 5 of secondaries distinct ..... Cerura. 



Vein 5 of secondaries weak or absent. 



Tip of abdomen with a brush-like tuft . . Melalopha. 



Tip of abdomen simple. 



Size small Gluphisia. 



Size larger Eumelia. 



A tufted tooth on internal margin of primaries . . . Pheosia, 

 AntenncE of (^ simple, without distinct pectinations. 

 A tufted tooth on internal margin of primaries. 



Accessory cell absent Lophodotlta. 



Accessory cell present Lophopteryx. 



Internal margin entire. 



Accessory cell present Datana. 



Accessory cell absent ....... Nystalea. 



Antennce of (^ pectinated for basal two-thirds or more, the tips 



bare Heterocampinae. 



A slight tooth on internal margin of primaries . . . lanassa. 



Internal margin entiie. 

 Accessory cell present. 

 Antennae of 9 simple. 



Antennae of (^ pectinated for basal three-fourths or less. 

 A vertical tuft on the head; black spots above internal 



angle of primaries . , . . Dasylophia. 



Head without a distinct erect tuft. 

 Terminal abdominal hairs gathered into a more or 



less conspicuously bifid tuft . . Schizura. 



* For a fuller treatment of this family see Trans. Am. Ent. Soc, Vol. XXI, 

 pp. 179-208. 



