ANOPLURORUM BRITANNIA. 233 



the occiput to the eyes; clypeus pale, with a somewhat 

 bilobed whitish spot on each side, margined with black, base 

 with a row of deep punctures ; eyes large, pale fuscous ; 

 prothorax somewhat obcordate, with a pale reflexed lateral 

 margin three-fourths of its length, fringed with strong bris- 

 tles, centre channelled, anterior part with a transverse im- 

 pressed line, and four punctures, base rotundate and retuse, 

 lateral margin with a pitchy-black fascia; mesothorax trans- 

 verse, punctured, basal margin rotundate and pale fulvous, 

 lateral margin slightly sinuated, pitchy; metathorax large, 

 punctured on the sides, angles obtuse, basal margin broad, 

 pale fulvous, with a pitchy-black band extending diagonally 

 across the humeral portion, centre channelled; abdomen 

 large, ovate, convex, depressed in the centre, lateral margin 

 and sutures pale, each segment, excepting the last two, with 

 a dark pitchy dorsal band, terminating in a pitchy-black 

 bifurcation on each side ; legs strong and hairy, the supe- 

 rior margin with an annulus at the apex of the femora, pitchy 

 black, the anterior femora nearly orbicular, curved back- 

 ward, the margin inflected, posterior femora sub-dentate 

 inferiorly ; tibiae densely fringed with long hairs. Length 

 3 lines. 



This species, which is one of the largest of the Family 

 inhabiting this country, is a very common parasite on the 

 Domestic Goose, and may frequently be seen running on 

 that bird with great velocity, either in a progressive or re- 

 trograde direction, and owing to its polished and somewhat 

 flat surface is difficult to retain when caught. I have never 

 found it on any other than the Domestic Goose, but Mr. 

 Thompson sent me specimens taken on the Larus Canus 

 and Cygnus Bewickii, and Dr. Burmeister mentions the 

 Tame Swan (Cygnus Olor). I have no doubt of this being 

 the T. Conspurcatum of Nitzsch, though it appears to be 

 larger than the German specimens. 



