1925] Pectinate Antennae in the Geometridce ( Lepidoptera ) 109 
on both series on Bupalus, Crocallis and Euctenurapteryx. 
Old-world genera. 
Chemerina , Cleogene, Dasydia, Epione, Bupalus, Euctenura- 
pteryx (maculicaudaria ) , Crocallis. The last genus on most 
characters is an outlier of series I. 
Series III. Pectinations scaled, cones apical. 
This is far the smallest, and in antennal structure the most 
homogeneous of the four series, but the genitalic structure as 
well as the appearance seems to indicate it is not homogeneous. 
Gnophos is particularly troublesome, as with a great variety of 
antennal type the genitalia are homogeneous, while Plataea, 
which has practically the antenna of G. dilucidaria, has wholly 
different genitalia. 
Bases of pectinations conspicuously transversely rugose, and 
often swollen. 
Pectinations basal on segments. 
Over 40 segments. . . Gnophos , Patcea, Pherne 
Under 40 segments Glaucina, Coenocharis 
Pectinations subapical. 
Segments under 40, pectinations short . Carphoides, Barnesia 
Segments over 40, pectinations long Pterotcea 
Bases of pectinations smooth or nearly so. 
Antenna pectinate to apex. 
Lightly chitinized; segments stout Ennomos 
Heavily chitinized; segments very slender Aspilates 
Antenna with a long simple apex. ... (a few aberrant Nipterias) 
Series IV : Pectinations scaled, cones basal. 
There are two main types involved in this group, one rep- 
resented by Cabera and Apicia (Caberodes), in which the cre- 
master of the pupa has eight hooks, and the other by the Cleora 
group with a bifid cremaster. There is a corresponding difference 
in the appearance of the moth and of the antennae, and the groups 
are no doubt natural, although at present impossible to define. 
Ametris, commonly put with the (Enochrominae, seems to belong 
