408 A. E. Verrill— The Bermuda Islands. 820 
segment centered with pale yellow; abdomen crossed by 8 to 10 pale 
yellow bars, alternating with wider black ones with nearly parallel 
sides, and usually having a small yellow spot at the lateral ends ; 
sometimes the black bars are so wide that the yellow ones become 
narrow lines or partly disappear ; under surface dark brown; head 
yellowish with dark brown markings, which usually form two or — 
three distinct small spots on each side. Young are paler brown. 
Length, 4.5™™. Identified by Professor Kellogg. 
It is a very common and widely diffused species, found on various 
species of ducks, geese, loons, and other aquatic birds. Our speci- 
mens differ only in being rather darker in color than usual ; and in 
having the black and yellow abdominal bars nearly straight and 
parallel, the black bars being scarcely expanded laterally. See 
Kellogg, New Mallophaga, i, Proc. Calif. Acad., vi, p. 152, pl. xii, 
fig. 4, 1896. 
It is remarkable that this species, which chiefly infests ducks, 
should occur on the Tropic-bird, for all the ducks that visit Bermuda 
in winter depart before the arrival of the Tropic-bird in spring. 
Moreover the latter breeds in holes in the cliffs and does not frequent 
the marshes where the ducks occur. Probably these parasites were 
transferred from ducks at some former period, or in some other 
country, where the conditions were different. Possibly the Tropic- 
bird may associate more or less with ducks during its winter 
migrations. 
Bird-louse of Cardinal. (Docophorus communis Nitz.) Kellogg, 
New Mallophaga, i, Proc. Calif. Acad. Science, vi, p. 486, pl. 
Ibn, ies, Ze 
Several specimens of this species were found on a Cardinal by 
A. H. Verrill. They agree in general with Kellogg’s figure of this 
species, but the thorax is rather shorter and broader, due perhaps to 
drying. This species has been found on many kinds of passerine 
birds both in Europe and America. Kellogg records it from the 
N. American Cardinal and many other birds. 
Bird-louse of Bluebird. (Docophorus incisus Kell., op. cit., p. 474, 
pl. Ixv, fig. 3, 1897.) 
A few specimens probably referable to this species were found on 
the Bermuda Bluebird by A. H. Verrill. They were perhaps 
immature and are distorted by drying. Length about 1™™. They 
