Fluke—Syrphidae of Wisconsin. 
235 
specimens have a very decided brown stripe on the face; 
all of the large specimens and even the males of the 
smaller ones have the bands distinctly attenuated. 
55. 8. torvus 0. S. Dane and Milwaukee Counties. Early spring 
and summer. May easily be told from all other species 
of the genus Syrphus in Wisconsin by the pilosity of the 
eyes. 
56. 8. protritus 0. S. Seven females and two males from Dane 
and Dunn Counties. July to October. 
57. 8. americanus Wied. Common throughout the State from 
May to October. 
58. S. species no. 3. Dane and Manitowoc Counties. May to 
October. 
59. 8. kndbi Shannon. Dane County. June to August. Figure 
44. Several males and two females, mostly bred speci¬ 
mens. 
60. 8. xanthostomus Will. One female, Dane County, May 26, 
1918. Figure 45. 
61. S. grossulariae Meig. Milwaukee, Dane, Jefferson, and Vilas 
Counties. 
Allograpta Osten Sacken 
62. A. obliqua Say. Common in almost every part of the State. 
Xanthogramma Schiner 
1. Dorsum of thorax before the scutellum with two coalescent 
light yellow spots; wings with a brown anterior margin 
... aequalis 
Dorsum of thorax without yellow spots on the hind margin; 
wings not brown in front... 2 
2. Hind femora pure yellow without any dark ring about the 
middle, pleurae with distinct bright yellow spots of 
ground color . flavipes 
Hind femora nearly always dark or with a brown ring near 
the middle, pleurae with indistinct bright yellow spots of 
ground color . 3 
3. Yellow band on second abdominal segment separated from the 
lateral margins by a distinct black interval... 4 
Yellow band on second segment reaches the side margins. 6 
