ANOPLURORUM BRITANNIA. 167 



3. LIPEURUS GYRICORNIS. Denny. (Louse of the 



Common Tern.) 



Plate XV. Fig. 1. 



Chestnut, smooth and shining ; head sub-cordate ; an- 

 tennae longer than the head, the first joint very long and 

 twisted ; abdomen obscure chestnut, the sutures pale. 



Head and thorax light chestnut, the former sub-cordate ; 

 vertex concave, lateral margin pitchy ; clypeus .deeply 

 emarginate, labium produced; eyes small, prominent and 

 black ; antennae pale, longer than the head, the first joint 

 very long, somewhat flattened and twisted, second about 

 one-third the size of the former and conical, third still 

 less and cylindrical, and only very slightly recurved, fourth 

 and fifth very small ; prothorax transverse, anterior part 

 narrowed and rotundate, centre with a broad channel, base 

 convex ; metathorax quadrate, slightly sinuated at the shoul- 

 ders, lateral margin with a pitchy fascia, base truncate ; 

 abdomen elongate ovate, dark chestnut, sutures pale ochra- 

 ceous ; legs rather thick, pale chestnut ; anterior femora 

 large, margin involute. Length 1 . 



I have seen only a single specimen of this species which 

 I took from the Common Tern (Sterna Hirundo). Its re- 

 markable antennae easily distinguishes it from all the other 

 species, in consequence of which, believing it undescribed, 

 I have named it in allusion to the twisted appearance of 

 the large antennae. 



4. LIPEURUS QUADRIPUSTULATUS. (Louse of the Golden 

 and Cinereous Eagles.) 



Plate XVI. 



Elongate, pale fulvous-yellow, shining and pubescent ; 

 abdomen with pitchy-brown bands, marked on each side 

 with a fulvous spot, surrounded with black, the first, sixth, 



