278 



THE STUDY OF IiVSECTS. 



nized by the following combination of characters : Vein V, 

 of the hind wings does not arise much nearer to vein V, 



than to vein V 3 (as it 

 does in the Geomet- 

 ridae), veins II and III 

 of the hind wings are 

 closely approximate 

 but do not coalesce along 

 the second fourth, 

 more or less, of the 

 discal cell (Fig. 327), 

 and veins III and V, 

 of the hind wings do 

 not coalesce beyond 

 the apex of the discal 

 cell. This last char- 

 acter does not apply 

 to the family as a 

 whole, but merely to 

 those that retain vein 

 V 2 of the hind wings; 



FIG. 327. Wings of Carifeta angustioratn. jj-j some of tllOSC ill 



which this vein is lost, the coalescence of veins III and V, 

 is carried beyond the apex of the cell. 



This is by far the largest of the families of the Geome- 

 trina and contains the greater number of our larger species. 

 The following will serve as 

 illustrations of it : 



The Notched-wing Ge- 

 ometer, Ennomos magnarius 

 (En'no-mos mag-na'ri-us), is 

 one of the largest of our 

 Geometrids. The larva is 

 a common looper upon 

 maple, chestnut, and birch 

 trees, and measures about two and one third inches in length 



VII 



XI 



VIIj 



FIG. 328. Ennomos magnarius. 



