LYCiENIDiE. 
203 
sporting in the sunshine, and pick out the kinds which are most 
desired. 
Still another of our native double-tailed insects belonging to this 
genus and inhabiting all the upper part of the eastern half of the 
country is Theda humuli. The upper side is sooty brown, sometimes 
blackish or bluish, particularly on the lower wings. The upper wings 
have no marks of any kind except the usual sex mark in the males. 
The lower wings have two delicate tails on each, the lower pair being 
much the longer. These are black, tipped with white. Between the 
base of the tails is a black spot, and above this a large, orange red 
crescent. Two or three dim bluish spots are located between this 
orange crescent and the inner angle of the wing. A narrow black 
line, edged internally with a faint whitish line, runs from the base 
of the upper tail to near the inner angle, where there is usually a 
Thecla humuli. 
faint orange spot. The eyes are brown, the front part of the head 
white, the thorax and upper part of the abdomen bluish black, the 
latter tipped with reddish brown. 
Thecla humuli. Under side. 
The under side of the wing is a delicate light grayish brown. 
The upper margin of the fore wing along the inner half is tinged 
with red, and two lines of blackish spots are placed on the outer third 
of the wing. The outer line is faint, and fades out completely at 
