ANOPLURORUM BRITANNIA. 145 



transverse, rotundate, channelled ; metathorax sub-trape- 

 zoidal, posterior margin acuminate and setose, a pitchy 

 cuneiform humeral patch on each side; abdomen slender, 

 sub-claviform, each segment with a pitchy black lateral 

 margin, the median line obscure chestnut, sutures pale; 

 legs rather thick, fulvous. Lenth f P 1. 



Found on the Whimbrel (Numenius phseopus) at Truro, 

 by Mr. Tweedy, on the Pigmy Curlew (Tringa subarquata) 

 at Carlisle, by Mr. Heysham, and in Norfolk by my brother. 



46. NIRMUS HOLOPHAEUS. (Louse of the Ruff.) 



Plate X. Fig. 10. 



Chestnut, shining and smooth ; clypeus obtuse ; abdomen 

 cylindrical ; sutural annuli pale ; legs thick. 



Nirmus holophaeus. Burmeister Handbuch ii. pt. ii. p. 427. sp. 3 



Head conical, with a deep fuscous triangular patch on 

 each side before the antennae, and two depressed lines at 

 the occiput; antennae filiform, the second joint the longest; 

 prothorax sub- quadrangular, lateral margin rotundate, de- 

 pressed on each side anteriorly, centre with a depressed 

 line ; metathorax the width of the head, subquadrate, an- 

 terior margin somewhat rotundate, with a fuscous humeral 

 spot on each side, produced in the centre, and angular ; 

 abdomen elongate, sub-cylindrical, apex obtusely ovate, 

 each segment with broad transverse deep chestnut band, 

 sutural margins prominent; legs thick, posterior sub- 

 angular. Length 1. 



I have found this species upon the Ruff (Machetes pugnax) 

 in Yorkshire, and my brother has sent me specimens from 

 the same bird killed in Norfolk. Dr. Burmeister, besides 

 the Ruff, mentions the Pigmy Curlew and the Turnstone 



L 



