1913] 
Graenicher, Wisconsin Diptera. 
181 
P. tibialis Fallen. Genoa in Vernon Co., Rutledge in Grant Co., 
and Two Rivers in Manitowoc Co. 
Chilosia. 
C. sororcula Williston. Two Rivers in Manitowoc Co. 
Baccha. 
B. fascipennis Wiedemann. 1 male from Dane Co. in Prof. Wm. 
S. Marshall’s collection. It has “the face and front metallic green, 
the tubercle and a lunule above the antennae enclosing a small black 
spot yellow,” the same, as two males from Connecticut referred to by 
Prof. Williston (Synopsis N. Am. Syrphidae, p. 121). 
B. lemur Osten-Sacken. A female taken by Prof. Wm. S. Marshall 
at Tenderfoot Lake, Vilas Co., in July 1912. Length over 13 mm. Face 
entirely yellowish. There are two yellowish spots, one above the base 
of each antennae, which are nearly united above, leaving a distinct 
black spot between them. This character is mentioned in the descrip¬ 
tion of B. fascipennis (Synopsis N. Am. Syrphidae, p. 120), but not in 
that of B. lemur. The red cross-bands at the bases of the third 
and fourth abdominal segments are slightly interrupted. This species 
has been recorded from California, Nevada, Wyoming, and Colorado. 
Pyrophaena. 
P. rosarum Fabricius. This boreal species occurs in the northern 
half of our state, and seems to be rather rare. 1 male and 1 female 
were taken by Prof. Wan. S. Marshall at Trout Lake, Vilas Co., in August, 
1912. The male has two large yellow spots on the 3rd abdominal seg¬ 
ment. which are barely separated in the middle. In addition to these 
there are two smaller spots on segment 4, and in this respect the speci¬ 
men agrees with the male from Elkhart Lake, Sheboygan Co., referred 
to in Can. Ent. Vol. 42, p. 28 (1910). In the female specimen the usual 
two spots on segment 3 are united to a single one. There are no mark¬ 
ings on segment 4, but an indistinct U-shaped median spot on seg¬ 
ment 2. 
Platychirus. 
P. hyperboreus Staeger. Oostburg in Sheboygan Co.; Two Rivers 
in Manitowoc Co.; Tenderfoot Lake and Trout Lake in Vilas Co. 
P. peltatus Meigen. Fifield in Price Co. and Tenderfoot Lake in 
Vilas Co. 
P. quadratus Say. Dane Co. and Genoa in Vernon Co. 
Melanostoma. 
M. mellinum Linne. Dane Co. and Two Rivers in Manitowoc Co. 
