80 



GENUS XIPHANDRIUM IN NORTH AMERICA 



6. Hind femoru and their tibiae almost wholly yellow; outer hypopygial 



lamellae as in figure 6. (Arizona.) trlangulatum new species 



Hind femora blaek at tip; hind tibiae wholly deep black 7 



7. Inner hypopygial appendages club-shaped. (Pennsylvania.) 



xipheres Wheeler 

 Inner appendages more shovcl-shapcd (about as in figures 3 and <Sj S 



8. Inner hypopygial appendages (figure 3) with a horn-like protuberance 



near the middle of their length. (Nevada, Oregon. Alaska.) 



f emoratum var. pollex new variety 



Inner ap])endages without such a protuberance; hypo])vgium as in figure 1, 



(Nevada, Alaska.) femoratum new species 



Explanatiou of Jiguren of Xiphandrium 

 V\g. 1, fcinordluni new species, hypopygium of male. ]''ig. 2, htngicornc 

 new species, hypoi)ygium of male. Fig. 3, fotionituin variety pollex new 

 variety, inner apjiendages of the hypopygium of male. Fig. I, /< iHoralnDi 

 new species, outer lamella cf the hypopygium of male. Fig. 5, fcniuK uin new 

 species, hypopygium of male. Fig. G, triatu/ulatiini new species, outer hypoj)yg- 

 ial lamella of male. Fig. 7, fonincuni variety diibium new variet.y, outer 

 hyi)0[)ygial lamella of male. Fig. 8, Jciaiii'-tun. variety dubiuin new variety, 

 inner appendages of the hypopygium of male. Figs. 9 and 10, aldricki new 

 species, a|>pendage; of the male liypopygium. 



