70 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



Loheliae is the largest of this series in average expanse and much the 

 best marked. All the black dashes and dagger marks are fully devel- 

 oped, and tlie basal streak is heavy and crosses the transverse anterior 

 line in most instances. The ground color is. on the whole, only a little 

 darker than in laetijica. 



Furcifera is a decidedly darker, bluish-gray sjiecies, and distinctly 

 smaller in average size. Yet a hxrge fnrci/rra may fully equal a small 

 loheliae, and in that case the darker ground color of the present sijecies 

 and the darker, smoky secondaries may be relied upon. As a rule the 

 basal streak, though as prominent as in loheliae, does not cross the inner 

 transverse anterior line, and the dagger mark opposite the cell is less 

 prominent and rarely crosses the transverse posterior line. Though on 

 superficial characters there may be occasionally a doubt as between 

 loheliae and fur ci /'era, the male claspers of the former have always a 

 long finger-like process from the n])per margin, of which those of fur- 

 cifera show no trace. 



Ha.sfa is very closely allied to furcifera, and the species are mixed in 

 almost all collections. With a scries of both species at hand separa- 

 tion is easy; with a few specimens only there may be doubt. Hasta 

 as a whole is of a clearer ashen-gray ground color, to which the smoky 

 shadings give a peculiar mottled appearance which is not present in 

 furcifera. In the latter species the secondaries are in the male dis- 

 tinctly smoky, while in hasta they are almost white, with only a slight 

 smoky yellowish tinge. In the female the difi'erence is less obvious, 

 but also present. The male genitalia are practically alike in the two 

 species. 



Manitoba is a very distinct species, continuing in the direction in 

 which hasta diverges from furcifera. The ])rimaries are yet clearer 

 ash gray, the mottling tends a little to the strigate tyi)e, and the 

 secondaries in tlie male are white, with only a very narrow, soiled 

 outer edge. 



Thoracica is yet paler, the transverse anterior line is almost lost, 

 and the strigate character of the marking is obvious. Besides the 

 discoloration of the thoracic disk, there is a vague yellowish shading 

 in the primaries. A ])rominent black streak extends from the costa 

 obliquely outward between the ordinary spots, which are very close 

 together and not at all well defined. 



Strigulata forms the end of this line, with very pale blue-gray strigate 

 primaries, in which nearly all the tranverse maculation is obsolete, and 

 pure white secondaries in both sexes. The discolored thoracic tuft is 

 small and sometimes almost obsolete; but the relationship to thoracica 

 is evident. 



IJthospila, with its strigate, dark, smoky, blue-gray primaries, is 

 unique and not easily mistakable. The transverse maculation is prac- 

 tically obsolete, the ordinary spots are bnrely traceable, and there are 

 no obvious streaks or dagger marks. Altogether the species is inter- 



