[86 CONNE< riCUT GEOL. AND NAT. BIST. SURVEY. [Bull. 



Didea Macquart. 

 fasciata Macquart. Syn. X. A. Syrph., 89. (A.B.C.) 



Syrphus Fabricius. 



amalopis Osten Sacken. Syn. X. A. Syrph., 69. (SAV.W.) 



americanus Wiedmann. Ibid., 82. 



arcuatus Fallen. Ibid., 68. 



grossulariae Meigen. lesueurii. Syn. X. A. Syrph., 80. 



latifasciatus Macquart. abbreviates Zetterstedt. Ibid., 81. 



perplexus ( >sburn. Jour. X. Y. Ent. Sue, xviii, 155. 



ribesii Linnaeus. Syn. N. A. Syrph., 77. 



torvus ( Isten Sacken. Ibid., 7<j. 



xanthostomus Williston. Ibid., 86 



Allograpta ( )sten Sacken. 



obliqua Say. Syn. X. A. Syrph., 96. 



Xanthogramma Schiner. 



aequalis Loew. Syn. X. A. Syrph., 95. (A.B.C.) 

 emarginata Say. Ibid., 93. (A.B.C.) 

 felix Osten Sacken. Ibid., 91. (SAV.W.) 

 flavipes Loew. Ibid., 94. 



Mesogramma Loew. 



geminata Say. Mesograpta. Syn. N. A. Syrph., 102. 

 marginata Say. Mesograpta. Ibid., 100. 

 polita Say. Mesograpta. Ibid., 98. 



Sphaerophoria St. Fargeau and Serville. 

 cylindrica Say. Syn. X. A. Syrph., 105. 



Sphegina Meigen. 

 campanulata Robertson. Can. Ent., xxxiii, 284. (C.W.J.) 

 keeniana Williston. Syn. N. A. Syrph., 113. (C.W.J.) 

 lobata Loew. Ibid., 115. (C.W.J.) 

 rufiventris Loew. Ibid., 114. (H.W.W.) 



Neoascia Williston. 



distincta Williston. Syn. N. A. Syrph., 112. (C.W.J.) 

 globosa Walker. Ibid., III. 



Rhingia Scopoli. 

 nasica Say. Syn. X. A. Syrph., 130. 



