390 



CALIFORNIA ACADEMY OF SCIENCES 



(Proc. 4th Ser. 



It* 



7.%- 



3 3 



3 */ 



a^ 



3 J- 



Cnemodon placida, female, antenna. 

 Cnemodon auripleura, female, antenna. 

 Cnemodon auripleura, male, antenna. 

 Cnemodon corvallis, female, antenna. 

 Cnemodon lovetti, male, antenna. 

 Heringia comutata, male, antenna. 



It 

 16a. Heringia salax, male, antenna. 22. 



17. Heringia canadensis, male, antenna. 23. 



18. Heringia intensica, male, antenna. 24. 



19. Cnemodon sinuosa, female, antenna. 25. 



20. Cnemodon placida, male, antenna. 26. 



21. Cnemodon rita, male, antenna. 27. 



28. Venter of Heringia: a-c, length of fourth segment; 



b-c, length of venter of fourth segment; 

 d, hypopygial segments; e, hypopygium; 

 f, membrane; ft, chitinous ventral plate. 



29. Pipiaa oregona, upper portion of head, showing narrowly contiguous eyes. 



30. Pipiia nigripilosa, head of female. 34. Cnemodon corvallis, wing. 



31. Cnemodon sinuosa, head of female. 35. Cnemodon intermedia, female, wing 



32. Heringia canadensis wing 36. Pipua femoralis, wing. 



33. Cnemodon sinuosa.wing. 37. Pipiza luteitaris, hind femora. 



