Fios. 139-184.— Genital stipites of 139-140, Bembix arcuata; 141, B. U-screpta; 142-143, B. cinerea; 144-145 

 B. hinei; 146-147, B. NUBILIPENNIS; 148-149, B. amoENa; 150-151, B. sayi; 152-153, B. belfraGEI; 154, 

 B. STENEBDOMa; 155-156, B. foxi; 157-158, B. spinolae; 159-160, B. spinolae, showing variation; 161- 

 162, B. cameroni; 163-164, B. comata; 165, B. comata, showing variation; 166-167, B. primaaestate; 



168, B. PRIMAAESTATE, SHOWING VARIATION; 169-170, B. SIMILANS; 171-172, B. PRUINOSA; 173-174, B. BEUTEN- 



mulleri; 175-176, B. occidentaus; 177-178, B. troglodytes; 179-180, B. melanaspis; 181-182, B. texana, 



188-184, B. HELIANTHOPOLIS. 



149 



