178 MONOGRAPHIA 



lateral margin, base truncate; abdomen nearly filiform, the 

 lateral margin of the first eight segments with a broad 

 quadrangular black band ; stigmatic orifices pale ; legs 

 very pale, long, and thick, the upper margin dark brown ; 

 tarsi fulvous. Length $ 1 ? 1|. 



I have considerable doubts whether this and the preced- 

 ing species are specifically distinct, although they are con- 

 sidered so by most authors. I have received it from the 

 Rev. L. Jenyns, taken on the White-fronted Goose (Anser 

 albifrons), Mr. Thompson on the Brent (Bernicla tor- 

 quata), Mr. Selby on the Wild Goose (Anser ferus), and 

 Mr Heysham on the Bean Goose (Anser Segetum). 



14 LIPEURUS STELLABIS. Denny. (Louse of the Bittern.) 

 Plate XV. Fig. 3. 



Pale yellow; abdomen acutely ovate, the fourth, fifth, 

 sixth, and seventh segments with a dusky band, and two 

 black spots. 



Head elongate, sub-triangular, pale fulvous-yellow, with 

 an impressed line from the clypeus to the vertex, ending in 

 a foveolse, and two oblique lines from the antennae to the 

 occiput, a narrow fuscous band passing down the lateral 

 margin ; eyes small and pale ; antennae long and slender, 

 in the male the first and second joints long and cylindrical, 

 third very short, abruptly hooked, last two slender and 

 equal ; prothorax transverse, channelled, lateral margin 

 dusky, base rotundate ; metathorax as wide as the head, 

 quadrate, with a dusky band on each side, base truncate ; 

 abdomen elongate, and acutely ovate, pale ashy- white, 

 with a yellow shade, the fourth, fifth, sixth, and seventh 

 segments with a dusky band at the sutural margin, and two 

 black spots on each ; legs pale, yellow-white; anterior femora 

 enlarged, superior margin involute. Length 1 to H. 



