288 AMERICAN LEPIDOPTERA. 



or purple brown color, with silvery-white or yellowish, shining, 

 marginal spots. The second group has the forewing grayish-fuscous 

 to brown or dark brown, with nunierous oblique costal strife, mostly 

 white, rarely yellowish and without any metallic lustre. The spe- 

 cies comprising this group resemble each other very much, are 

 closely related and difficult to distinguish. The principal charac- 

 ters to be relied upon are the markings of the labial palpi, colora- 

 tion of the head, the dark ciliary lines, the plical spots and last but 

 not least, the food plant. 



The following characters are common to all of the last group : 

 Maxillary palpi white, sometimes slightly dusted with fuscous ex- 

 ternally. Antennae fuscous or brown above, indistinctly annulate 

 with and beneath paler. Costal striae rarely definite in number, 

 generally ill defined, obscure and directed obliquely backward in 

 basal half of wing, the outer striae distinct, more or less perpendicu- 

 lar to the costal margin, the last stria as a rule forms a curved line 

 extending through both the costal and dorsal cilia ; immediately 

 behind this line and in the apex of the wing is a dark blackish 

 spot. Generally speaking the interstrial spaces are darker than the 

 color of the wing. In the fold are two spots or patches— plical 

 spots— rarely absent; the first of these is at one-fourth, the second 

 about the middle, these spots vary in size and form, but appear to 

 be fairly constant for each species. That part of the wing below 

 the fold — subplical space — is in almost all the species, more or less 

 mixed with white; basal part generally white. In the cilia, com- 

 mencing about what would correspond to the tornus, are three darker 

 lines, the first about the middle, the second nearer and the third on 

 the free ciliary margin ; this last line either extends entirely around 

 the apex, or it coalesces below the apex of the wing, with tlie second 

 line, and in this case the cilia are white on their free margin around 

 the apex ; generally there is a short fragmentary line below the 

 apex and between the first and second line. Anterior and middle 

 legs dark blackish-fuscous; femora spotted with white; end of tibiae 

 white; tarsi white, joints fuscous at apex ; hind legs whitish, tarsal 

 joints darker at the apex. Anal bush in the male generally a sordid 

 yellow. 



Generally the larva at first forms a nepticula like tract, which 

 widens into a blotch- mine. When full grown it leaves the mine and 

 forms a cocoon under the turned over edge of the leaf. According 



