122 THE COMMONER BUTTERFLIES. 



tion with smaller meshes than usual, elevated at points of inter- 

 section ; abdomen scarcely wider than thorax, its hairs not more 

 than one fourth the length of the segments. Length f inch. 



So far as known, this butterfly inhabits only a narrow 

 strip across the Eastern United States, being rarely found 

 north of lat. 42° or south of 40°; but it is reported in the 

 extreme West beyond our district at widely remote spots, 

 even in the Canadian Rockies. It is an exceedingly lively 

 insect, especially the male, and the story of its life is very 

 similar to that of the last species. It hibernates in the 

 Qgg state, feeds on oak, biting holes in the leaves, and flies 

 from July to September. As in T. calanus, eggs have been 

 known to hatch the same season. 



THECLA ACADICA— THE ACADIAN HAIR-STREAK. 



(Thecla calif ornica, Thecla souhegan, Thecla borus, Thecla cygnus.) 



Butterfly. — Fore wings of male with a discal stigma; hind 

 wings with a long thread-like tail. Upper surface lustrous dark 

 slate-brown, with an orange lunule on outer margin of hind 

 wings. Under surface pearl-gray with a white-edged narrow 

 bar at end of cell, an extramesial series of white-edged, round, 

 occasionally oval, black spots, and the usual marginal markings 

 of the genus, here more conspicuous, more continuous, and with 

 more orange than usual. Expanse 1| inches. 



Caterpillar. — Onisciform. Head minute, pale greenish brown. 

 Body naked, pilose, tapering considerably behind, grass-green, 

 with many oblique yellowish stripes on the sides. Length f inch. 



Chrysalis. — Dull yellowish brown, spotted with blackish brown, 

 and with a dark dorsal stripe; reticulation with larger meshes than 

 usual, elevated at intersection; abdomen scarcely wider than 

 thorax, its hairs but little more than a fourth the length of 

 the segments. Length | inch. 



The distribution of this butterfly in the East is similar to 

 that of the preceding species excej^t that the belt is removed 

 a little further north, the butterfly being found a short 

 distance only on either side of the Canadian border; it is 



