FEATHER-LICE OF DUCKS, ETC. 123 

Fig. 99.—Biting-louse of Fig. 100.—Biting-louse of ducks, etc. 
ducks, etc. Greatly enlarged. Greatly enlarged. Original. 
Original. 
abdomen, which in the latter, is broken up into little squarish 
patches. (Fig. 99.) 
Lipeurus anseris Gurlt. 
This species is also stated to occur upon the domesti- 
cated goose. 
Lipeurus jejunus Nitzsch. 
This slender pale yellowish-white parasite, with a black 
margin and four-sided bands upon the first eight segments, 
and with dark legs,is also found upon our domestic and wild 
goose. 
Ornithobius cygni Denny. 
This handsome feather-louse occurs in large numbers up- 
on wild and domestic swans. It is a large species, measur- 
ing about 4mm. in length, with a slender and flattened body. 
