SARCOrilAGA AND ALI.IES 175 



8. Prescutellars absent; forceps nearly straight, in 



profile with a notch behind near base (very 

 widespread ) 



Xo. 87. hcemorrlioidalis Fall. 

 Prescutellars present 9. 



9. Middle tibia? villous, no ant acr 10. 

 Middle tibii\3 not villous. 1.5. 



10. Only one row of black hairs behind the eye; ro- 



bust tropical species with golden head and 

 beard, and yellow pollen on sides of thorax 

 and abdomen (W. I. and south) 



No. 88. wiedemanni n. sp. 



More than one row of black hairs behind the eve ; 



a group of slender, blackish western species, 



head gray 11. 



11. Anterior clasper short, with sharp, curved point 



and a sudden widening on outer side half- 

 w^ay to base (Colo., N. M.) 



No. 90. elongata n. sp. 

 Anterior clasper much longer, with rounded or 

 forked tip, and not abruptly wider on outer 

 side on basal half 12. 



12. Penis with five or six slender processes at 



apex 13. 



Penis ending in a more globose or platelike 



structure • 14. 



13. Forceps bent forward on hind edge near tip with 



a rather distinct angle; front lobes of distal 

 segment of penis in the form of shining 

 blackish plates (Idaho) 



No. 89. thai una n. sp. 



Forceps evenly curved forward in profile; front 



lobes of distal segment of penis in the form 



of a delicate pale membrane or fringe (Ida., 



Wash.) No. 91. occidcntalis n. sp. 



14. Penis with two pairs of very large longitudinal 



plates on the front side, and the apex 

 fringed with yellowish pul)escence (Idaho) 



No. 92. juUaetfa n. sp. 



