250 NATURE-STUDY REVIEW [13:6— Sept., 1917 



2 . With no band of yellow surrounding eye-spots on 



front wing. 



Dull Eyed Grayling. 



3. The eye-spots on front wing each surrounded by 



yellow ring or set in yellow patch. 



Hybrid Grayling. 

 CCC. With two equal spots on front wing. Expanse i>^ 

 inches. With two eye-spots on hind wings and some- 

 times a sm,aller one. 



Little Wood Satyr. 

 CCCC. With four small e^^e-spots in a row on front wings. 

 With five small eye-spots along margin of hind wing. 



The Eyed Brown. 

 BB. Small butterflies with thread-like tails or with short pro- 

 jections on hind wings. 



The Hair Streaks. 

 BBB. Small butterflies without projections on hind wings. 

 With rather heavy bodies and antennae bent at the tip. 



The Skippers. 

 AAAAAAA. Butterflies blue or marked conspicuously with blue. 

 B. Small butterflies mostly blue. 

 C. Without tails to hind wings. 



I. Lower sides of wings pale ash gray. Expanse 

 about one inch. The Spring Azure. 



CC. With tail-like prolongation to hind wings. 



Hair Streaks. 

 BB . Large black butterflies without tails to hind wings, marked 

 with double row of blue spots near border of hind wings. 



The Banded Purple. 

 BBB. Large butterflies with tails to hind wings. 



1. Black butterflies, sheen on hind wings blue or 



greenish blue. Blue Swallowtail. 



Green-clouded Swallowtail. 



2. Black btitterflies with blue spots on hind wings. 



Glaucus form of Tiger Swallowtail. 

 Black Swallowtail, female. 

 BBBB. Black butterfly with slight tail Hke prolongation on 

 hind wings. With yellow border and row of blue 

 spots inside of it. 



Mourning Cloak. 



