1918] Johnson—Notes on the Species of the Genus Dioctria 103 
noted a more extended distribution of some of the species and also 
the fact that two of the names used are preoccupied. In calling 
Mr. Banks’ attention to this he said that he did not have access to 
the catalogues at the time and desired me to correct these in con- 
nection with my notes. 
Dioctria brevis Banks. 
This species has been taken by the writer at Mt. Tom, Mass., 
July 14, 1905; Delaware Water Gap, N. J., July 11, 1898, and 
Aquia Creek, Va., May 24, 1896. 
Dioctria banksi nom. nov. 
D. longicornis Banks, Psycun, xxiv, 118, 1917, not Meigen, 
1820. Four specimens of this species were collected near Long 
Branch, N. J., June 9, 1913. A specimen from Philadelphia, Pa., 
(June 22, 1893), is also in my collection. 
Dioctria sackeni Williston. 
A specimen of what is undoubtedly the female of this species was 
taken by the writer near Ricketts, North Mt., Pa., June 9, 1898, 
at the same time and place that a male was also captured. It has 
the bright yellow tomentum of the face, front and thorax, and the 
yellow legs of the male, but the wings are uniformly hyaline with a 
slight yellowish tinge near the base. 
Dioctria media Banks. 
A single specimen of this species from Seattle, Wash., collected 
years ago by the late Professor O. B. Johnson is in my collection. 
Dioctria henshawi nom. nov. 
D. flavipes Banks, Psycur, xxtv, 119, 1917, not Meigen, 1804. 
The name flavipes being preoccupied in this genus, the species is 
dedicated to Mr. Samuel Henshaw who collected the type at 
Yakima, Wash., July 2, 1882. 
