274 Air. W. F. de Vismes Kane on 



moderately elongate, not compressed, pilose; basal joint of 

 the posterior short, second and fifth of about equal leno'th. 

 Front coxce large, prominent, and contiguous; the middle 

 pair widely separated. Sternal lamina large and plane, 

 tapering from the base of the metasternum to beyond the 

 middle coxse. Mesosternal process vertical and short, its 

 suture curvate. 



Tliis is nearly allied to Hi/drostygnus, but may be readily 

 distinguished therefrom by the large prominent coxse. The 

 antennas differ and the club is shorter and broader, and the 

 maxillary palpi are less slender. 



Thomosis guanicola, sp. n. 



Ohlong-oval, nude, moderately nitid, nigro-piceous ; legs 

 and lateral margins pitchy red ; palpi and antennte usually 

 testaceous ; body closely and moderately finely punctured. 



Head not half the width of the thorax, longer than broad, 

 subconical. Thorax almost twice as broad as it is long, 

 regularly curvedly narrowed towards the front, lateral margins 

 well developed. Scutellum triangular. Elytra with ten 

 series of distinct but not coarse punctures on each ; the 

 sutural at the apex almost form striae. 



Underside nigrescent, mostly densely and finely sculptured, 

 with short, inconspicuous, dark ashy pubescence. Abdomen 

 with five segment>, the three central nearly equal, the basal 

 subcarinate along the middle. 



Length 3^, breadth If lines. 



Bounty Islands. 



Found by Mr. L. Coekayne feeding on deposits of guano. 



Aucldand, New Zealand, 

 27th August, 1903. 



XL. — Niphargus Kochianus, Batp^ in an Irish Lake and 

 N. subterraneus, Leach, in Kent. By W. F. de Vismes 

 Kane, M.R.LA. 



[Plate Mil.] 



The following notes on the occurrence of one of these blind 

 crustaceans in the open waters of Lough Mask will be of 

 value, especially as in many respects they tend to confirm cer- 

 tain opinions held by Fore), Humbert, and others in connexion 

 with allied species of Amphipoda. Several genera and many 



