90 
Psyche 
[June 
rudimentary and is entirely absent in two specimens, while in two 
others the vein forming the outer part of the discal cell is wanting. 
It seems therefore apparent that the synonomy of this species 
should stand as follows:— 
Actina viridis (Say). 
Beris viridis Say, Long’s Exped., App., 368, 1824. 
Beris quadridentata Walker, List Dipt., I, 127, 1848. 
Actina viridis Aldrich, Cat’L, 174, 1905 
Hemiberis quadridentata Enderlein, Mitteilungen Zool. 
Mus. Berlin, 10: 209, 1920. 
Allactina viridis Curran, Can. Ent., 56: 24, 1924. 
The species is widely distributed. I have before me 65 
specimens collected from Codroy, Newfoundland, to St. Paul, 
Minn., and south to the Black Mts., N. C. The only noticeable 
variation is in those from the more northern locaiities, especially 
in the males. Specimens from East Cape Anticosta Island, 
collected July 7, 1881 by Mr Samuel Henshaw, are slightly 
smaller and have the legs dark. All of the femora are brownish- 
black, only the extreme basal part of the tibiae are yellow, the 
tarsi are also dark except the posterior metatarsi, which are also 
brownish toward the outer end The female, however, has only 
the tips of the femora, the outer two-thirds of the tibiae and the 
tarsi (except the posterior metatarsi) dark brown. I propose the 
varietal name of obscuripes or the six specimens from Anticosta 
Island. Holy type and three paratypes in the Museum of Com- 
parative Zoology. Allotype and one paratype in the Museum of 
the Boston Society of Natural History. Two males from Low 
Bush, Lake Abittibi, Ontario, June 11, 1925 (N. K. Bigelow), 
have the femora blackish, except for narrow basal and apical 
bands of yellow. A third male, however, from the same locality 
has the femora yellow. 
