256 



XORTH AMERICAN DIPTERA 



Syiphidae V. — 65, Copestylum marginatum; 66. Citibaena ; 67, Nausigaster punctulata; 

 68, Leucozona americanum ; 69. Pyrophaena granditarsis; TO, Pyrophsena granditarsis, abdomen; 

 71, Baccha fuscipennis ; 72, Sphrerophoria cylindrica, abdomen: 73, 74. Pyropha!na granditarsis, 

 front and middle tibia? and tarsi; 75, Copestylum marginatum; 76. Ornidia obesa; 77. Volu- 

 cella bombylans ; 78. Citibaena; 79, Nausigaster; 80. Paragus tibialis; 81, Leucozona ameri- 

 canum; 82, Chrysotoxum; 83, Doros a^qualis; 84, 85, Eupeodes volucris, c abdomen and jieni- 

 talia ; 86. 87, Scava pyrastri; 88, Sphserophoria cylindrica; 89. 90. Toxomerus geminatus, hind 

 leg and head. 



