ANOPLURORUM BRITANNIA. 75 



Head sub-triangular, anteriorly notched,, with an oblong 

 quadrate depression, and two diagonal dark brown bands 

 from the trabeculae to the occiput, base rotundate ; eyes 

 prominent ; trabeculse tolerably large, curved and acute ; 

 antennae rather slender, pale chestnut; prothorax conical, 

 posterior margin convex; metathorax transverse, rather 

 wider than the head, posterior margin deep chestnut and 

 angular ; abdomen broad, ovate, yellowish white, emar- 

 ginate, the first eight segments with an elongate, acute,, 

 tongue-shaped bright chestnut fascia on each side, spiracu- 

 lar apertures pale, lateral margin liver colour, last segment 

 chestnut ; legs thick ; anterior femora sub-angular. Length f . 



Common upon the Oyster-catcher (Haematopus Os- 

 tralegus). 



14. DOCOPHORUS RALLI. Denny. (Louse of the Water- 

 Rail.) 



Plate V. Fig. 6. 



Bright chestnut, yellow, shining and smooth ; head large, 

 triangular ; legs very thick ; abdomen obtusely ovate, with 

 a pale tawny margin. 



Head bright chestnut, yellow, elongate, triangular, ante- 

 riorly produced with an imperfect marginal line, two semi- 

 circular lines meeting and uniting in the centre, and two 

 dark chestnut diagonal narrow bands from the antennae to 

 the occiput; eyes very small and black; antennae short, 

 thick, and cylindrical ; trabeculse small ; prothorax trans- 

 verse ; metathorax small, about the width of the head, 

 lateral margin almost rectangular, posterior angular; ab- 

 domen yellow white, obtusely ovate, with a broad light 

 tawny-yellow lateral margin, sutures sinuated in the centre 



