820 A. E. Verrill — 77ie Bermuda Islands. 



segment centered with pale yellow; abdomen crossed by 8 to 10 pale 

 } r ellow 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 mm . 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, pi. xiii, 

 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, pi. 

 lxvi, fig. V. 



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. [DocopJiorus incisus Kell., op. cit., p. 474, 

 pi. lxv, fig. 3, 1897.) 



A few specimens probabty 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 l mm . They 



