22 Second Report on Economic Zoology. 
BewicKi), and by Dr. Burmeister on the Domestic Swan ( Cygnus 
olor). 
Another smaller species ( Trinoton squalidus, Denny) also occurs 
on the Domestic Goose and on the White-fronted Goose ( Anser 
albifrons) and on the Shoveller (. Anas clypeata). This last-named 
louse is much smaller than the former. In colour it is pale 
yellowish-grey, with smooth shiny coat, black head with four dark 
lateral spots on it, black lines on the thorax and a dull brown band 
near the apex of the femora, and the tibiae fringed with long hairs. 
Length li lines. It is undoubtedly the same species that Nitzsch 
described as Trinoton lituratum. Piaget records it also from 
Bendrocyyna arborea, and I believe it has also been found on the 
Smew. 
A Lipeurus (Lip cur us jcjunus, Nitzsch) is also found on the 
Goose. This long, narrow louse is pale yellowish-white with a 
dark margin, the first eight segments with quadrangular bands ; legs 
dusky. Length 1 to 1J lines. It is generally distributed amongst 
the goose tribe both wild and domesticated. I have not seen this 
species, but I presume it works in a similar way to the Lipeurus 
found on fowls and pigeons. 
Another Lipeurus (L. ctnseris) has been described, but I know 
nothing of it. Piaget, however, retains it as a distinct species. 
The specimens were taken on Domestic Geese. 
Pig Lice (Hsemcitojnnus urius , Nitzsch). 
Specimens of lice, LLsemcttopinus urius , of Nitzsch, affecting pigs, 
were received from Mr. Mitchell, of Laddingford Manor, Yalding. It 
is the largest of the lice belonging to the Pediculinse. The pig is 
often attacked and inconvenienced by this pest. The skin becomes 
marked by red papules, and becomes inflamed and diseased. They 
cause intense irritation, unrest, and frequently check growth in young 
pigs to an alarming extent. In many cases young porkers have 
succumbed to their attack. 
The head and abdomen are dull yellowish -grey, the thorax 
reddish-brown, the legs pale brown, and the abdomen has dark 
markings, variable in shade ; the head is long and narrow. The 
female when ungorged is about 5 mm. long, but some sent in a very 
distended condition were as much as 6 mm. in length. 
There is nothing like creolin for such parasites, 10 to 15 per cent, 
in water, two or three dressings of which are necessary. Paraffin 
was tried, but the lice appeared again. 
