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.^ 



On Aug. 29, 1921, Mr. A. B. Fuller obtained two specimens 

 from the Savannah Sparrow {Passerculus 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 

 Wulp 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. Wlien 

 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, 



iThis 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. 



