The Classification of Moths 



volume of his "Catalogue of the Lepidoptera Phalaenae," and in 

 the preparation of which he has been assisted by Dr. Dyar. 



KEY TO THE FAMILIES OF NORTH AMERICAN 

 HETEROCERA. 



Antennae not clubbed or dilated, or frenulum present when clubbed 



or dilated. Frenulum present when not otherwise indicated. . i 



i Hind wing with cell emitting not more than six veins ; wings unlike 



in shape 2 



Hind wing with cell emitting more than six veins; wings similar in 



shape 44 



2 Hind wing with vein ic absent 3 



Hind wing with vein ic present 22 



3 Fore wing with vein 5 nearer 4 than 6 4 



Fore wing with vein 5 from middle of discocellulars or nearer 6 



than 4 15 



4 Hind wing with vein 8 absent Fam. 4, SyntomidcB. 



Hind wing with Vein 8 present 5 



5 Hind wing with vein 8 remote from 7 6 



Hind wing with vein S touching or approximate to 7 beyond cell . . : 1 2 

 6 Hind wing with vein 8 anastomosing with cell to near or beyona 



middle 7 



Hind wing with vein G anastomosing with cell near base only 9 



Hind wing with vein 8 joined to cell by a bar. .Fam. 14, Liparidce. 



7 Ocelli present Fam. 6, ArctiidcB. 



Ocelli absent 8 



8 Fore wing with tufts of raised scales in the cell. .Fam. 20, Nolidce. 



Fore wing withoiit such tufts Fam. 5, Lithosiidce. 



9 Antennae with shaft more or less dilated toward tip 



Fam. 7 , Agaristidce. 



Antennae with sliaft not dilated 10 



10 Hind wing with veins 3 and 4 stalked Fam. 10, Pericopida. 



Hind wing with veins 3 and 4 not stalked 1 1 



ii Fore wing with costa and inner margin parallel, arched at base .... 



; . Fam. 9, Nycteolidae. 



Fore wing trigonatc Fam. 8, Noctu',d&. 



ia Hind wing with vein ia absent or not reaching anal angle 



Fam. 17, Platypterygidce. 



Hind wing with vein ia reaching anal angle 13 



13 Frenulum present Fam. 28, Thyrididce. 



Frenulum absent Fam. 15, Lasiocampidae. 



14 Hind wing with vein 8 diverging from cell from base 15 



Hind wing with vein 8 connected or approximate to cell 17 



15 Tongue absent; no tibial spurs; frenulum absent . . Fam. 2, Saturniida. 



Tongue and tibial spurs present; frenulum absent 



Fam. 3, Ceratocampidai. 



24 



