cael 
SUBORDER MALLOPHAGA. 201 
referred to by Linneus, Albin, Olfers, and others, but the description 
by Nitzsch may be taken as the first strictly technical description that 
would separate it certainly from related forms. Deuny records it as 
taken from the white-fronted goose, the brent, the wild goose, and the 
bean goose, and Piaget adds the gray goose, Canada goose, domestic 
goose, and the egypticus. 
It is evident, therefore, that it is generally distributed upon members 
of the goose family. 
We have not had specimens in hand, but it is described as slender, 
pale yellow-white, with a pitchy margin, the first eight segments of the 
abdomen with quadrangular bands, and the legs dusky above. 
THE TURKEY LOUSE. 
(Lipeurus polytrapezius Nitzsch. ) 
This, like the variabilis, appears to have been one of the earliest 
species to receive recognition, as Linnus cites Redi (Exper., t. I], fig. 
2) with the name Pediculus accipitris, while he himself uses the name 
Pediculus meleagridis, and gives a brief description, which probably 
refers to this species. Authors have 
quite generally, however, followed the 
name given by Nitzsch, as above. It 
has doubtless been common wherever 
this fowl has been kept and is one of the 
familiar species. 
It is of rather large size, 3 to 35 mm. 
(an eighth of an inch) in length, of an 
elongated form, having a pale, yellowish 
white color, and with a black margin 
around the body. The abdomen is long, 
and all the segments but the last are 
marked with agrayish brown trapezoidal 
spoton each side. According to Denny: 
Their mode of progression is rather singular, 
as well as rapid. They slide, as it were, side- 
wise extremely quick from one side of the fiber 
of a feather to the other, and move equally 
well in a forward or retrograde direction, which, 
together with their flat, polished bodies, ren- 
ders them extremely difficult to catch or hold. 
Ihave observed that where two or more genera infest one bird, they have each their 
favorite localities; for, while the Goniodes stylifer will be found on the breast and 
neck of the bird, the Lipeurus polytrapezius will be congregated in numbers on the 
webs and shafts of the primary wing feathers. 
Fic. 123.—Lipeurus polytrapezius — en- 
larged (after Piaget). 
Very common on turkeys, and I have specimens from the wild turkey 
as well. 
