22 Second Report on Econoimc Zoology. 



Benidii), and by Dr. Burineister on the Domestic Swan {Cygmm 

 olor). 



Another smaller species (Trinoton squalklus, Denny) also occurs 

 on the Domestic Goose and on the White-fronted Goose {Anser 

 alhifrons) and on the Shoveller {Anas chjjpeata). 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 tibire fringed with long hairs. 

 Length 1^ lines. It is undoubtedly the same species that Nitzsch 

 described as Trinoton lituratnm. Piaget records it also from 

 Dendrocygna arborea, and I believe it has also been found on the 

 SmeM', 



A Lipeurus {Lii^eurus jejunus, 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 1^ 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 Lipeiirus 

 found on fowls and pigeons. 



Another Lipcurus (Z, anseris) 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 [Hsematopinus iirius, Nitzsch). 



Specimens of lice, Hmmatopinvs 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 theu" 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. 



