200 RLVISION OF MAMESTEA SMITH. 



Groups renigera, olivacea, and laiidahilis agree iu small size, short, 

 rather obtuse primaries aud general form of genitalia. The reniform 

 is usually narrow, pale or white marked, and somewhat constricted 

 mediall3% 



In group renigera the harpes are produced into a long curved hook, 

 and the clasper is nearly as long as the hook of the harpes. 



In the oUvacea group the harpes have the tip rounded, lappet-like, 

 and the clasper is shorter cylindrical. 



la group laudahilis the harpes have a long, narrow piece set at an 

 angle to base, and this is obliquely truncate at tip. The clasper is 

 short, thick, and beak-like. 



There is a considerable similarity in the maculation of the species of 

 the three groups, especially noticeable between the renigera and olivacea 

 forms, and each of the groups forms a small aggregation of closely 

 related and sometimes very variable forms. 



Group A:annulata is based on a small species, similar to the preceding 

 in wing form; but the ordinary spots are subequal, white ringed, the 

 transverse lines are obsolete, and there is a long black basal dash looped 

 at the end to form the claviform. 



Group innexa is also based on a single, rather peculiar species, first 

 described as a FerigraiJlia by Mr. Grote. It is a reddish pearl gray in 

 color, and has pale transverse lines. The primaries are narrow and 

 have a depressed costa and somewhat i)romiuent apices. 



Group i^ensilis contains rather narrow-wioged forms, with acute or 

 rectangular apices and oblique outer margin. The species are of some 

 shade of gray, very variable, and two of them uncomfortably close in 

 superficial appearance, though perfectly distinct structurally. 



Altogether we have an assemblage which differs more at its extremes 

 than do the forms as a whole from a number of other genera. 



In tabular form the group scheme separates as follows : 



1. Anteume of g serrated aud furnished with lateral tufts of bristles ..Div. A. 



Auteuu.TB of <? simple, merely ciliated laterally Div.B. 2 



2. S. t. line with a prominent W-mark Group.. w-maculata. 



S. t. line without such a mark 3 



3. Large red or black-brown species, hind angles of primaries not re- 



tracted Group . . VINDEMIALIS. 



Large or moderate sized species, never evenly red brown, primaries nar- 

 rower, hind angles distinctly retracted Group.. latex. 



Moderate or rather small species with trigonate primaries, apices marked, 

 hind angles not retracted 4 



Moderate sized species with broad primaries, obtuse apices, and rounded 



outer margin '5 



Small, stout, stumpy winged species, the costa not depressed 6 



Small species, less robust, narrow winged, with determinate or somewhat 

 produced apices, hind angles not retreating 9 



4. Maculation white, often blotcliy ; harpes abruptly bent at outer 



third Group . . adjuncta . 



Maculation not blotchy; colors usually luteous, resembling f/v/o/ii, geni- 

 talia various Group., defessa. 



5. Wings varying iu width, costa sometimes quite strongly arched. .Group. .legitima. 



