^"[soT^] PROCEEDINGS OF THE NATIONAL MUSEUM. 199 



marked or serrate, laterally bristle- tufted ia the male. In B, tbe male 

 antennne are simple, or at most ciliated. The division, as has been in- 

 dicated, is an arbitrary one, and in A, the species as a whole have no 

 close habital bond of union ; yet in the large pale species, discaliSj 

 closely allied as it is to nimhosa and imbri/ero, barely comes within the 

 definition of the group, while leucogramma for instance is completely 

 isolated and agrees with itself only ! No allied species are disassoci- 

 ated, however, and though perhaps not ideally the best, yet the divi- 

 sions are jiractical at least. 



Division A contains comparatively few spocies and no groupings are 

 necessary. 



In Division B the species are numerous, and it is possible to separate 

 them into groups, which in most cases associate closely allied forms. 



Group W-maculata is described in its name, though there is no species 

 so dubbed. The species are all identified at a glance by the prominent 

 W mark of the s. t. line, which is usually white and contrasting, vary- 

 ing somewhat in the length of the angles, but always nearly or quite 

 crossing the terminal space. I should very much have liked to name 

 this group W-album ; but unfortunately the species has no white W, 

 and, after all, Gueuee called his species Ualhum, and meant what he 

 saiO, for, as he describes it, the reniform is inferiorly outlined in white, 

 making a U. Walker changed it to V album and Mr. Grote made it 

 W- album, effectually obscuring the meaning conveyed in the name as 

 originally imposed. 



Group vindemialis contains a few species of large size and red or black- 

 brown color, the hind augle of primaries not retracted. The body is 

 robust, with dense woolly clothing, and they should be quite readily 

 referred. 



Group latex also contains species of at least moderate size, never red 

 or black-brown, narrower winged, the hind angle of primaries distinctly 

 retracted. Lubens has bioader wings than the type of the group and 

 is different in maculation, but can not be referred elsewhere on account 

 of the distinct retraction of the hind angle. 



Group adjuncta contains rather small or only moderate-sized species, 

 with blotchy white markings on a dark ground. There is a uniformity 

 of genital structure, the harpes being abruptly bent at outer third. 



Group defessa is negatively characterized and its species have no 

 6-ommon bond of union. They are robust, the type with a resemblance 

 to trifolii, with rather broad trigonate primaries, distinct apices, and 

 oblique outer margin. The S genitalia have no common character. 

 The species are moderate in size and have no characters which would 

 refer them to any other group. 



Group legitima is characterized by moderately robust body and broad, 

 comparatively short primaries, which have the apices obtuse and the 

 outer margin rounded. Two rather well marked subgroups are indi- 

 cated, of one of which legitima is typical, and of the other of which 

 goodeUi form the type. 



