82 
Psyche 
[April 
This specimen has attached to it two Mallophaga, one on each 
side of the abdomen just back of the posterior edge of the first 
segment; in the dried specimen they extend beyond the end of 
the fly’s abdomen, with the ends of the Mallophaga touching 
each other. It is an interesting example of phoresy and shows 
how many of the Mallophaga are probably distributed. 1 
On Aug. 29, 1921, Mr. A. B. Fuller obtained two specimens 
from the Savannah Sparrow (Passer cuius sandwichensis savanna ) 
at Essex, Mass. One of the flies had attached to it a pupa, 
black and polished in appearance, but when enlarged twenty- 
five diameters it shows an irregular mosaic-like pattern. 
At one end there is a slight contraction, forming four or five 
slight nodes. Its length is 2.5 mm., while the total length of 
the dried fly is 4 mm. In a recent “Annotated List of the Dip- 
tera or Oregon,” by Cole and Lovett (Proc. Cal. Acad. Sci., 
1921, 4th ser., XI, 344), this species is recorded from “Upper 
Alsea Valley, Benton Co., on Steller’s Jay.” Coquillett records 
it from Washington D. C., to California. 
Except for size, I see little to separate this species from the 
European 0. avicularia Linn., and it is probably what Van der 
Whip had before him when he recorded the latter from Wiscon- 
sin (Tijdsch. v. Ent., XII, 80, 1869). As Coquillett suggests 
(Ent. News, XVIII, 290, 1907), it may represent one holarctic 
species. The 0. avicularia also frequents many species of birds, 
including hawks, owls, woodpeckers, herons, ravens, jays, par- 
tridges, peacocks, crossbills, sparrows, skylarks etc. 
Olfersia albipennis Say. 
It is a question whether 0. albipennis and what we are calling 
0. ardece are not one and the same species, but whether it is the 
same as the European species is still another question. When 
the light strikes the wings at a certain angle, especially when 
they overlap each other, they are often decidedly whitish in 
color, hence Say’s name. As it is an older name than 0. ardece, 
tThis specimen was recorded by Nathan Banks in Psyche, Vol. 27, p. 20, 1920, and by W. 
L. McAtee in Ent. News, Vol. 33, p. 20, 1922. The bird however was not mentioned. 
