144 NORTH AMERICAN BUTTERFLIES. 



366. THECLA IRUS Godt. 



Pearly Butterfly. 

 Similar to T. augustus, but differs in having more prominent teeth 

 to the hind wing, Fig. 41, c, and the dark line crossing wings is white 

 bordered on the outside, and the outer half of hind wing is overwashed 

 with whitish. Expands 1.00 to 1.25. Habitat, Atlantic and Western 

 States. Occurs in May. 



367. THECLA MOSSII, II. Edw. 



Moss' Butterfly. 

 Differs from the tj'pe in having no teeth to hind wings, m being 

 brighter chestnut brown above, with fringes wholly white, not alternate- 

 ly white and brown, and in being more reddish brown beneath. The 

 marginal spots are large, distinct, and bright chestnut brown, six in num- 

 ber, each surmounted by a small black crescent. Basal portion of the 

 hind wing dark brown. Habitat, Vancouver's Island. 



368. THECLA HENRICI Gr-Rob 



Henry's Butterfly. 

 Similar to T. iris but differs in having the sex mark on fore wings 

 only twice as long as wide, not three times as in irus. The outer portion 

 of hind wing is rusty colored and the teeth are shorter and the first be- 

 yond the inner angle do not curve outward. Expands .05 to 1.10. 

 Found in West Virginia. 



36!). THECLA In^IPHON Hub. 



Black and White Butterfly. 

 Similar to T. irus, but differs in having the line on fore wing bent 

 outward in the middle. On hind wing there is a band of rusty checkers 

 crossing outer portion in a brown field, and the basal portion of wing is 

 checkered with rusty, and crossed by a black line. Females are rusty 

 in middle of wings above, leaving the border and base only brown. Ex- 

 pands 1.00 to 1.25. Found in Atlantic and Western States, Colorado, 

 Ontario, Quebec, and Nova Scotia, Occurs in May. 



370. THECLA AFFINIS Edw. 



Green Hair-streak. 

 Size, small. No tails. Glossy reddish brown, with upper and out- 

 er margin of fore wings blackish, fringed with white. Beneath, uniform 

 bright green, excepting on lower border of fore wing, where it is pale 

 brownish gray. No spots on either surface. Expands about 1.00. 

 Found in Utah. 



