32 PROCEEDINGS OF THE NATIONAL MUSEUM. 



In group loheliae the harpes are very slender and long and the claspers 

 are broad and entirely separated from them, except at the base. The 

 individual clasper is long, broad, becoming scooi> shaped toward the 

 end, and at the upper angle of this scoop a finger of varying length and 

 curvature is developed. In many cases another finger-like process 

 arises from the middle of the upper margin and projects at right angles 

 to it. This structure is accompanied by much less trigonate primaries 

 than was found in the previous group. They widen more abruptly on 

 the inner margin, which is more nearly parallel with the costa, and the 

 outer margin is much shorter, more bulging centrally, and meeting the 

 costa in almost a right angle. 



Almost all the species in which this structure is typical have a more 

 or less obvious basal dash, a distinct dash usually forming a psi oppo- 

 site the anal angle, often a dash opposite the cell and sometimes a 

 black line connecting the ordinary si)ots. The vestiture in such cases 

 is smooth and even. The first obvious superficial change is in the 

 character of the vestiture, which becomes roughened, while the scales 

 on the primaries tend to become elevated. The typical markings 

 become obscured and the male organs emphasize the departure by 

 changing the form of the scoop of the clasper into a flat plate, then to 

 a more cylindrical, spear or beak shaped process, while the superior 

 process becomes in some cases dominant. In another direction, while 

 the maculation is at first powdery the vestiture remains normal, and 

 indeed becomes much more smooth and even, while the dashes and psi 

 marks are reduced and become much less prominent. 



It is in this group that the greatest difficulties in arranging the 

 species are experienced, because of these several branchings, which 

 will not fit into any linear series. 



Group persuasa is an offshoot from the previous group through 

 hrumosa. The clasper is broad, flattened, chitinous, united superiorly 

 to the inferior mat-gin of the harpe, furnished at the upper angle of tip 

 with a longer or shorter, more or less curved corneous process, and at 

 the middle of the upper margin with a finger-like, upright process. 

 All the species agree in these characters. 



Suj)erficially the group is characterized by moderately trigonate 

 primaries, though they tend to vary, but all the maculation is obscured 

 and tends to become blotchy, A prominent, pale, round orbicular, with 

 a central dusky spot, is a characteristic feature and sometimes the only 

 contrasting mark. The vestiture is extremely rough in most of the 

 species. 



Group namamelis is characterized by the comparatively small, beak- 

 like clasper, which arises from an oblique thickening on the harpes and 

 near their center. Superficially these species are characterized by the 

 arched costa of the primaries, which broadens them near the base and 

 makes the inner and costal margins almost equal in length, the outer 

 margin being short and the apices almost rounded. Here also the vesti- 

 ture is distinctly roughened in most of the species. 



