392 



CALIFORNIA ACADEMY OF SCIENCES 



[Proc. 4th Ser. 



55. 56, 57. Pipiza macrofemoralis, male, hind femora, antenna and head 



58. Cnemodon pisticoides, male, cross section ofjjthird segment; a, rugose base; b, cannate 



end of segment. 



59. Cnemodon carinata, male; a, carinate venter of third segment; b, carinate base of fourth 



segment. 



60. Cnemodon venteris, male, cross section of fourth segment. 



61. Cnemodon ontarioensis, male, cross section of fourth segment. 

 6?. Cnemodon myerma, male, cross section of fourth segment. 



63. Cnemodon venteris, male, antenna. 64. Cnemodon venteris, female, antenna. 



05. Cnemodon venteris, male; a, hind trochanteral process. 



66. Cnemodon myenna, male; a and b as in 65. 



67. Cnemodon ontarioensis, female, antenna. 



68. Cnemodon ontarioensis, male, antenna. 



69. Cnemodon myerma, antenna, male and female. 



79 n?f a Pi^P'' 083 - antenna. 71. Pipiza nigripilosa, hind femora. 



a, I A, /4. Fipiza femorahs, antennae of two extremes and head of male 



