224 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE XVIIL 



Blepharocera jordani, sp. nov. 

 Fig. I. Head of male. 



Blepharocera osten-sackeni, sp. nov. 

 Fig. 2. Head of male. 



Bibiocephala doanei Kellogg. 

 Fig. 3. Head of male. 



Bibiocephala elegantulus von Roder. 



Fig. 4. Head of female. 

 Fig. 5. Head of male. 



Bibiocephala comstocki, sp. nov. 



Fig. 6. Head of female. 

 Fig. 7. Head of male. 



