138 GEOMETEID^:. 



Family GEOMETRIES. 



A large family of moths, almost always of slender build, and of 

 semidiurnal or crepuscular habits, dominant at the present day. 

 Proboscis present or rarely absent. Legs and tarsi slender, 

 elongate, and naked, or slightly clothed with hair. Pore wing with 

 vein 1 a forming a fork with 1 6, 1 c absent ; vein 5 from or from 

 above middle of the discocellulars, 7 rising from 8, 9 *. Hind wing 

 with the frenulum usually present, but absent in a few genera ; 



Fig. 76. Larva of Abraxas leucostola. \. 

 (From Hmpsn. 111. Het. ix, pi. 176, fig. 19.) 



vein 1 a very short, apparently absent in some forms ; vein 1 h 

 running to anal angle ; 1 c absent ; 8 with a well-developed pre- 

 costal spur. 



Larvce with the three anterior pairs of abdominal claspers totally 

 aborted, and progressing by bringing the posterior somites close to 

 the thoracic, looping the medial somites. In a few ancestral forms, 

 of the subfamily (Enochromince especially, there is a tendency to 

 develop additional prolegs and to a more ordinary mode of pro- 

 gression. 



Key to the Subfamilies. 



A. Hind wing with vein 5 obsolete, and with 



no production of the outer margin at the 



termination of the fold that represents it t. 1. Boarmiince. 



B. Hind wing with vein 5 fully developed J. 



a. Hind wing with vein 5 rising much nearer 



6 than 4 6. Oeometrince. 



b. Hind wing with vein 5 from or from below 



middle of discocellulars . 



a'. Hind wing with vein 8 connected with 



7 by an oblique bar near base 3. Orthostixince. 



b'. Hind wing with vein 8 anastomosing 



with 7 at base, then rapidly diverging. 5. Addaliince. 



c'. Hind wing with vein 8 free and approx- 

 imated to 7 to near middle of cell . . 2. (Enochromince. 



d'. Hind wing with vein 8 anastomosing 

 with 7 to beyond middle of cell, or 

 connected with it by a bar beyond 

 middle of cell 4. Larentiince. 



* Except in Cataclysma. 



t Except in Boarmia isometra. 



| Except in Microloba, $ . 



Except in Sarcinodes and Akx. 



