HYDROPHILID.^. 35 



Since the above was written the insect has been found in tlie 

 following localities : Greystones, Co. Wicklow (Carpenter) ; Dalkey, Co. 

 Dublin (Halbert) ; Dunfanaghy and Bunbeg, Co. Donegal, Bangor, Co. 

 Down, and Larne, Co. Antrim, and Douglas Hall, Kirkcudbiightshire 

 (F. Balfour- Browne) ; Llanstephen, Carmarthenshire (Kidson Taylor); 

 Rame Head, Plymouth district (Keys) ; Falmouth, Gerrans Bay, Corn- 

 wall, and St. Mary's, Scilly Isles (Champion) ; IST. Somerset ; Seaview, 

 Isle of Wight (Dollman and Donisthorpe) ; Saunton and Croyde, 

 Devon (Champion). 



Mr. E. A. Newbery (Ent. Mo. Mag. xliii. (2 Ser. xviii.) 1907, 173) 

 introduces 0. vii'idis, Peyron (Ann. Soc. Ent. Fr. 1858, 404) as new 

 to Britain, the only difference apparently between this insect and 

 0. margvpallens, Latr. (Gen. i. 70) being that the latter has the 

 metasternum entirely dull and alutaceous whereas in 0. virklis it is 

 smooth and shining in the middle. There is considerable doubt with 

 regard to the synonymy of 0. m.argipallens ; the insect so named by 

 some of the older writers (Marsham, Sturm, <tc.) appears to be synony- 

 mous with 0. marinus, while the 0. viridis of Peyron seems to be one 

 of the varieties of 0. margipaUens, Muls. (Palpic. 5-8). Ganglbauer 

 (Die Kjifer von Mitteleurop, 193-194) leaves out 0. margipaUens alto- 

 gether, and places part of the insects so named under 0. ma7-inus and 

 part under 0. viridis. - It does not seem quite evident why Latreille's 

 name should be sunk, unless it be to avoid confusion, and, at all events, 

 there does not seem at present to be sufficient reason to consider that 

 0. viridis and 0. margipaUens are distinct species. 



HYDR^NA, Kugelann. 

 H. britteni, Joy (Ent. Mo. Mag. xliii. (2 Ser. xviii.) 1907, 

 79). Rather elongate, pitchy or reddish-brown, with head pitchy- 

 black ; head shining, somewhat diffusely and strongly punctured ; 

 antennfB reddish-testaceous, club darker ; maxillary palpi reddish- 

 testaceous, tips of the last joint black, differing in the sexes ; in the 

 male the first and second joints are swollen at the apex, the third 

 arcuate, gradually broader for three-quarters of its length and then 

 abruptly cone-shaped to the tip, having a small smooth tubercle on the 

 inner or convex side at the junction of these two parts ; in the female 

 all the joints are simple, the last rather short, narrow, and broader in 

 the middle ; thorax transverse, somewhat obsoletely impressed at sides 

 and base, disc shining and diffusely punctured, punctuation thick 

 near the margins ; sides of thorax dilated in middle in a rounded 

 obtuse angle, contracted in a straight line to base, posterior angles 

 distinct, but obtuse, opposite 8th or 9th row of punctures on elytra ; 

 elytra subparallel, not dilated behind, broadest about middle, with nine 

 or ten rows of closely-set square punctures between the svature and 

 humeral angle, sutural angles separately rounded ; legs reddish- 

 testaceous. L. 14-2 mm. 



