ANOPLURORUM BRITANNIA. 147 



it on the Bar-toiled Godwit (Limosa rufa) ; a third was 

 sent me by my brother, taken from a specimen of the Ruff' 

 (Machetes pugnax). 



48. NIRMUS OBSCURUS ? 



Plate X. Fig. 6. 



Obscure chestnut, shining, smooth, and pubescent ; cly- 

 peus much produced ; head with two semicircular black 

 bands before the antennae, and two longitudinal impressed 

 lines at the occiput, the first seven segments of the abdomen 

 with the lateral margin pitchy black. 



Nirmus obscurus? Bnrmeister Handbuch ii. pt. ii. p. 427. spe. 1.? 



Head very long, conical ; clypeus much produced and 

 narrow, vertex concave, lateral margin two impressed lines 

 at the occiput, and semicircular fascia in front, pitchy black, 

 temporal angles rotundate and finely setose ; antennae long 

 and filiform ; trabeculse very short ; prothorax small, sub- 

 oval ; metathorax the width of the head, anteriorly rotun- 

 date, posterior margin angular and produced in the centre, 

 setose ; abdomen sub-lenticular, deep chestnut ; sutures pale, 

 the first seven segments with a black erose lateral margin ; 

 legs fulvous. Length |. 



This species is the most extensively dispersed of any Nir- 

 mus with which I am acquainted. It has been found on the 

 Sanderling ( Calidris arenaria), Dunlin (Tringa variabilis), 

 Little Stint (Tringa minuta), Curlew (Numenius arquata), 

 Black-tailed and Bar-tailed Godwits ( Limosa melanura and 

 rufa), Scaup Duck (Fuligula marila), by Mr. Thompson at 

 Belfast. On the Black Tern (Sterna nigra), Green Sand- 

 piper (Totanus Ochropus), Common Sandpiper (Totanus 

 Hypoleucos), by the Rev. L. Jenyns and Mr. Tweedy, and 

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



L 2 



