Fluke—Syrphidae of Wisconsin . 
227 
Male: Eyes bare, arista bare, pile dusky or whitish, 
no bristles on thorax or abdomen. Thorax shining metal¬ 
lic blue. Abdomen shining, except second segment and 
an hour-glass spot on the third segment. Face black- 
shining, covered with whitish pollen. Antennae reddish, 
arista darker. Tegulae whitish with light brownish hairs. 
Wings tinged with brown. Legs black except knees, base 
of tibiae, slightly at tip of tibiae, which are yellowish 
brown; tarsi brown. 
20. G. comosa Loew. One male, Madison, May 10, 1917; one male 
and three females, Madison, May 11, 1919. Figure 20. 
21. C. species. Two males caught at Madison, June 14, 1918, I 
am unable to place. They have the eyes bare, bristles on 
the margin of the scutellum, arista nearly bare, antennae 
rather dark, and tibiae largely yellow. 
22. C. cyanescens Loew. Milwaukee and Dane Counties. Early 
June. Figure 21. Males show the opaque black cross¬ 
band on the second abdominal segment; one male meas¬ 
ures 7 mm. in length. 
23. C. pallipes Loew. Two males, Jefferson County, September 
27, 1917; taken on flowers of goldenrod near a wooded 
area. 
24. C. tristis Loew. One female, Jefferson County, September 27, 
1917. I have referred this specimen to tristis rather than 
to pallipes as the humeri are without any light coloration. 
Baccha Fabricius 
X. Third joint of antennae elongate-oval, obtusely pointed; face 
very prominent ... .. clavata 
Third joint short-oval, obtusely rounded, face not prominent.. 2 
2. Wings subcinerescent; all the veins, except the last segment 
of the fourth, broadly clouded with brownish, confluent 
near the costa ... . lugens 
Wings hyaline with only a broad median cross-band reaching 
to the fourth posterior cell.......... ..... 8 
8. Scutellum and posterior part of the thoracic dorsum shining 
golden; abdominal bands yellowish red, broadly inter¬ 
rupted. .................................... fascipennis 
Scutellum translucent, yellowish brown, with a metallic reflec¬ 
tion; abdominal bands blood-red and only subinter¬ 
rupted ......... lemur 
