226 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 30 Ser. 



EXPLANATION OF PLATE XIX. 



(Only the primary or true venation shown; the secondary venation, or 

 lines of folding, omitted.) 



Blepharocera fasciata Loew. 

 Fig. I. Wing (after Loew). 



Blepharocera osten-sackeni, sp. nov. 

 Fig. 2. Wing (from specimen). 



Blepharocera jordani, sp. nov. 

 Fig. 3. Wing (from specimen). 



Bibiocephala doanei Kellogg. 

 Fig. 4. Wing (from specimen). 



Bibiocephala elegantulus von Roder. 

 Fig. 5. Wing (from specimen). 



Bibiocephala corns tocki, sp. nov. 

 Fig. 6. Wing (from specimen). 



Bibiocephala grandis Osten-Sacken. 

 Fig. 7. Wing (after Osten-sacken). 



Philorus bilobata Loew. 

 Fig. 8. Wing (after Loew). 



Philorus yosemite Osten-Sacken. 

 Fig. 9. Wing (Diagram made from description of Osten-Sacken). 



