Sept., 1910.] Smith : North American Agroperina. 147 



forming only a fairly obvious basal tuft on thorax and loose basal 

 tufts on abdomen in the male. In the female there is no distinct 

 dorsal tufting on the abdomen. 



The antennae of the male have the joints marked and the ciliations 

 arranged toward the centre, but not in definite tufts. In this connec- 

 tion it may be said that the antcnnal differences noticeable between 

 allied species are often more apparent than real. In examining a 

 long series of specimens otherwise closely resembling each other and 

 from the same locality, it becomes apparent that the ciliations quickly 

 become broken and thinned out. A perfectly fresh, new example will 

 have the ciliations longer than the width of the segments and quite 

 apparently grouped in a loose central tuft, so that the member appears 

 " bristle tufted." A flown specimen, obviously the same, will have 

 the fringes broken, part of them lost and so thinned out that they lose 

 the tufted appearance and so seem more evenly arranged as well as 

 more scanty and shorter. The actual form of the antennal segment, 

 however, forms a good discriminating character in many instances. 



The male genitalia of pendina are nearer to those of indela than 

 to those of lincosa. The form of the clasper is very similar, and so 

 is the general form of the harpes. But the ladle-like expansion is 

 decidedly broader, and the shape of the penis-sheath is materially 

 dift'erent. Comparison of the figures given will demonstrate these 

 dift'erences which are more easily seen than described. 



Arranged in tabular form the species may be separated as follows, 

 using Hampson's general grouping and characters. 



Synoptic Table of Agroperina. 



1. Primaries with a small white lunule on outer edge of reniform 2 



Primaries without such a lunule 4 



2. Primaries with a white lunule in center of reniform 3 



Primaries without such a lunule lateritia 



3. Primaries purplish red-brown cogitata 



Primaries purplish red-brown, suffused with black-brown dubitans 



4. Primaries fulvous yellow tinged with rufous ; maculation purplish or black- 



ish, conspicuous, broken, giving the wing a mottled appearance helva 



Primaries even in color, markings continuous, not contrasting or con- 

 spicuous 5 



5. Primaries grayish white, irrorated with rufous hitosa 



Primaries luteous to fulvous yellow and red brown 6 



