272 
HERBERT OSBORN. 
dominal segments bear lateral whitish fasciae bordeied with 
black. 
The species which seems most abundant of all is the 
Menopon pallidum (Fig. 13, Plate II). 
The annoyance that this species causes poultry is probably 
equal to that of all the other species combined, for it occurs 
in great abundance and almost every fowl examined will be 
found infested. Then, too, it passes readily to other specie* 
of birds, and many instances are recorded where horses kepi 
near hen roosts have been very seriously troubled by them 
Some of these accounts seem hardly credible, taken in con: 
nection with the habits of the insect, and we are inclined td 
think that the worst cases, at least, may have been due to itch 
mites on the poultry and the migration of them to the horses 
though in such case we should expect the fowls themselvej 
to show more serious injury. It is, at any rate, important td 
keep lousy chickens away from horses. 
The louse is pretty easily distinguished from other com 
mon species infesting the hen by its light color and its giea| 
activity, running with celerity among the feathers and from 
them upon the hands of persons holding fowls. It is from 11| 
iy/ millimeters in length, rather slender, and of a light strad 
yellow color 
Remedies for this species must aim to reach the hidin' 
places of the lice on the roosts and in the cracks of the wall 
of the hen house as well as to destroy those on the low 
Thorough fumigation and whitewashing, with careful attei. 
tion to cleanliness, will do much to keep them in checl 
Pyrethrum, kerosene, etc., may be used direct upon the fowl 
and if they are liberally supplied with wood ashes and roa 
dust they will do much to protect themselves. 
Duck Lice. 
Trinoton luridum , Nitzsch. (Plate II, Fig. 14). 
Redi seems to have been the first to give mention of th| 
very common species, it being figured in the Expen. PL Xj 
as the louse of the teal. It is also figured by x\lbin (P • 4 
.under the same common name as quoted by Denny. Nitzs<; 
described it in 1818 under the name given above, and tJ 
