394 THE STUDY OF INSECTS. 



ha-le'sus). — This is the largest of our eastern hair-streaks, 

 the larger individuals expanding two inches. In the male 

 the greater part of the upper surface of the wings is bright 

 blue ; the discal stigma, the outer fourth of the fore wings, 

 the apex of the inner margin of the hind wings, and the 

 tails are black. In the female the outer half of the wings is 

 black. 



The species occurs in the southern half of the United 

 States and southward. It has been found as far north as 

 Illinois. The larva is said to feed on oak. 



The White- M Hair-streak, Etipsyche m-album (Eu-psy'- 

 che m-al'bum). — This is a smaller species, expanding about 

 one and one half inches. The upper surface of the disk 

 of the wings is a rich, glossy dark blue, with green reflec- 

 tions ; a broad outer border and costal margin are black. 

 The hind wing has two tails, and a bright dark orange 

 spot preceded by white at the anal angle. The under sur- 

 face is brownish gray, and on this surface both wings are 

 crossed by a common, narrow white stripe, which forms a 

 large W or reversed M on the hind wings. 



This species occurs in the southern half of the United 

 States. The larva feeds on oak and on Astrangnhis. 



Subfamily LEMONIIN^E (Le-mon-i-i'nae). 



The Lemoniids (Le-mo' ni-ids). 



This is a large subfamily; but the species are found 

 chiefly in South and Central America. In our fauna it is 

 represented only by a small number of rare butterflies. 



If we except one Floridian species (Eumenia atald), this 

 subfamily is represented in the Eastern United States by 

 only two species. In the far West eleven others are now 

 known. The eastern species are the Large Metal-mark, 

 CalepJielis borealis (Cal-e-phe'lis bo-re-a'lis), which expands 

 one inch or more, and the Small Metal-mark, CalepJielis 

 ccenius (C. cae'ni-us), which expands less than four fifths of an 

 inch. In both species there are on the outer half of the 

 wings two lines of shining lead-colored scales. 



