78 
Psyche 
[June 
Synonymy.— That the flies here called L. fusca are spe- 
cifically distinct from L. americana can hardly be doubted. 
A specimen without locality, received from the Zoological 
Institute of Halle a.S. (through Dr. Vult Ziehen), had been 
named " fusca Macquart” by the late A. Bau and this identi- 
fication appears to be correct. Macquart’s species could not 
possibly be recognized from the original description. For- 
tunately, Speiser has fully redescribed the type (from the 
Bigot Collection, now in the possession of Mr. J. E. Collin), 
and his account tallies well with the specimens listed above. 
I am inclined to regard Olfersia wolcotti (type in the 
Dept, of Zoology, University of Nebraska at Lincoln, Ne- 
braska), as a synonym of L. fusca. Swenk’s brief descrip- 
tion agrees with my specimens, except for his statement 
that the frons is "not wider than the breadth of an eye.” 
In all my specimens of L. fusca, the frons is distinctly, 
though often only very slightly, wider than an eye. 
Falcoz (1930) lists as synonyms of L. fusca both Olfersia 
macquartii Rondani and (with doubt) 0 . angustifrons v.d. 
Wulp. With regard to angustifrons , I follow Swenk, who 
places it among the smaller species and I have seen several 
specimens from Central America that agree in every re- 
spect with the original description. It appears to be a per- 
fectly valid species. It is more difficult to decide what to do 
with 0 . macquartii (location of type unknown). Rondani 
received it from Macquart under the name “fusca” (but it 
was not Macquart’s type, although it came from the same 
locality) , and claimed that it did not agree with the origi- 
nal description of that species. Speiser (1902), in his dis- 
cussion of the type of 0 . fusca , regards macquartii as dis- 
tinct, but he points out only one difference: “Scheitel . . . 
in der Mitte des Vorderrandes mit einem seichten gruben- 
formig tiefen Einschnitt (Abweichung gegeniiber 0. mac- 
quartii Rond.).” This, however, is erroneous, since Ron- 
dani states in his description: "area verticale antice in 
medio incisa.” Rondani’s type does not appear to have 
been studied again. 
As indicated below, Olfersia raptatorum Lutz, Neiva and 
da Costa Lima is probably also a synonym of L. fusca . 
Ornithomya fusca "Macquart” Percheron, 1838, in 
