D JOHN B. SMITH. 



long, curved, semicylindrieal clasper with regular edges, starting 

 near the middle of the upper margin and curved so a* to reach the 

 inferior angle of the tip of the harpe. Two small, supplementary 

 claspers arise nearer the inferior margin, beyond the origin of the 

 larger structure. 



Stramerdosa is almost as large, with essentially the same mark- 

 ings, hut entirely different coloring. The ground is a pale clay 

 yellow, the costal region shaded with reddish to the t. p. line, while 

 the other shadings, especially the outer third of the median space, 

 aie distinctly olivaceous. The insect reminds me strongly of a 

 Cosmia. In a general way the male characters resemble those of 

 immanis, but the bent part of the harpe is much narrower, the tip 

 much smaller, with rounded angles, while the single clasper is much 

 stouter basally and has even edges. 



Obliqua is distinctly smaller, the median space is always darker 

 than the rest of the wing, and sets off the very oblique t. p. line and 

 its accompanying whitish shade. The outer margin of the prima- 

 ries is also more oblique than in the preceding, though not so much 

 as the t. p. line. The harpes in the male are much as in immanis, 

 but the tip is decidedly broader. There are two small, corneous 

 claspers, of which that nearest to base is beak-like, and that nearer 

 to the tij) is cylindrical, pointed and twisted. 



Medialis intensifies the contrasts of the preceding species; but 

 the male antennae are distinctly bristle tufted, the joints serrated 

 The ordinary markings are much less defined ; but essentially as in 

 obliqua. The harpes in the male narrow abruptly from below to 

 form a triangular tip, which ends almost squarely, and is fringed 

 with spinules, except at the lower angle. There is a beak-like 

 clasper with a broad base at the narrowest part; its point extending 

 to the end of the inferior angle of the tip of the harpe. Another 

 small, obtuse, cylindrical process arises nearer to the middle. 



Pallescens is yet more contrasting, but with a wash of white over 

 the whole primary, which gives a peculiar dead shade to the coloring. 

 The male an tenure are decidedly more strongly serrated, and the 

 bristle tufting is more obvious than in the preceding species. The 

 genitalia are much like those of medialis, but the clasper arises near 

 the middle of the harpes and extends to the lower angle of the tip. 

 It is very broad at base, semicylindrieal and with regular edges. A 

 small, cylindrical, somewhat club-shaped process arises within the 

 cavity at the base of the main clasper. 



