Fluke—Syrphidae of Wisconsin. 
241 
10. iScutellum with more or less black pile on the dorsum, thorax 
usually with indistinct oqaque black stripes; fourth seg¬ 
ment of abdomen with a rounded opaque spot.. dimidiatus 
Scutellum without black pile, entirely yellow, thorax entirely 
shining; fourth segment of abdomen shining, no opaque 
markings . latifrons 
11. Thickly pilose species, thorax deep opaque black. bastardi 
Thinly pilose species, thorax with brownish vittae. 12 
12. Basal two-thirds of basal joint of middle tarsi light-colored.... 
. arbustorum 
Middle metatarsi wholly black. meigenii 
88. E. tenax Linn. Grant, Pierce, Milwaukee, Washington, 
Douglas, and Dane Counties. Mid-summer to November. 
Figure 61. 
89. E. aeneus Scopoli. Two specimens from Milwaukee and Dane 
Counties. 
90. E. dimidiatus Wied. Cosmopolitan throughout the season. 
91. E. saxorum Wied. One female from Milwaukee County. 
92. E. latifrons. Loew. Dane, Pierce, and Milwaukee Counties. 
Late summer and fall. Scarce. 
93. E. meigenii Wied. Cosmopolitan from early spring to late 
fall. Figures 62, 63. 
94. E. arbustorum Linn. Cosmopolitan in the southern part of 
Wisconsin. Early spring to late fall. Figures 64, 65, 66. 
95. E. bastardii Macq. Common from very early spring to late 
fall, in nearly every part of the State. 
96. E. flavipes Walk. Milwaukee, Washington, Burnett, Iron, 
Douglas, Jefferson, Winnebago, and Dane Counties. 
August and September only. Figure 67. 
97. E. compact us Walk. Two males from Tomah, Wis., April 6 
and 24, 1910. 
98. E. transversus Wied. Cosmopolitan. June to mid-October. 
99. E. vinetorum Fabr. Two specimens from Milwaukee County. 
Tropidia Meigen 
100. T. quadrat a Say. Vernon, Buffalo, Milwaukee, Washington, 
Ashland, Manitowoc, Dane, and Jefferson Counties. June 
to October. Figure 68. 
16—S. A. L. 
