182 B. NKUMOEGEN AND H. G. DYAR. 



Vein v' of secondaries arising apparently from discal cross-vein ; sub- 

 costa running close to radius beyond cell, or even joining it. 



DREPANID-S3. 



Branches of radius of primaries all free THYBIDjE. 



Cubitus of primaries apparently 3-brancbed. 

 Veins V3 and vii, arising independently. 



Body slender, wings fragile, finely scaled I GEOMETRID^. 



i BBEPHID^. 

 Body larger and robust. 

 Vein Vj of secondaries joined to radius before apex of cell. 



CYMATOPHORID^. 



Vein V, joined at or beyond end of cell NOTODONTID^. 



Veins V3 and viii coalesced at base DIOPTID^. 



Becondaries with a distinct inter-costal cell; wings usually elongate. 



SPHINGID^. 



Family NOTODONTID^. 



Synopsis of Subfamilies and Genera. 



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



APATELODIN^. 

 Outer margin entire, or at most moderately excavate between the terminations 

 of the nervules. 



Antennae of % bipectinated to the tip or simple NOTODONTIN^E. 



Antenufe of % with distinct pectinations. 

 Primaries with an accessory cell. 



A tufted tooth on internal margin of primaries Kotodouta. 



Internal margin entire. 



Pectinations of antennae long. 



Thorax with large central tuft IVadata. 



Thorax untufted H^parpax. 



Pectinations moderate or short. 



Costa of primaries straight, apex rectangular Symilierista. 



Costa convex, apex rounded Nerice. 



Primaries without accessory cell (rarely a small one in one Cerura). 

 Internal margin entire. 



Vein 5 (vz) of secondaries distinct Cerura. 



Vein 5 (V2) of secondaries weak or absent. 



Tip of abdomen with a brush-like tuft JflelHloplia. 



Tip of abdomen simple | Gliiphisia. 



A tufted tooth on internal margin of primaries Plieosia. 



Antennae of % simple, without distinct pectinations. 

 A tufted tooth on internal margin of primaries. 



Accessory cell absent LopliOflonta. 



Accessory cell present ■ Lophopteryx. 



Internal margin entire. 



Accessory cell present I>ataiia. 



Accessory cell absent l^ystalca. 



