52 THE entomologist's record. 



Ants in the Museum at South Kensington, incorporating with them 

 the late Edward Saunders' collection. 



I discovered a ^ of Pnnera pnnctatisHMia from Oxford, doing duty 

 as a S in the General Collection of ants ; this I transferred to the 

 British Collection (this is only the second known British specimen, the 

 other was taken by Mr. Britten in Cumberland, and is now in my own 

 collection), and I have also added over 600 specimens of my own 

 captures. 



I have arranged and classified the ants according to our present 

 knowledge on the subject, the collection now being a nearly complete 

 and very fine one. It should prove of great use to all British students 

 who wish to study our ants, or name their captures. 



The Water=Beetles of Wood Walton Fen. 



By H. DONISTHORPE, F.Z.S., F.E.S. 

 Through the kindness of the Hon. N. Charles Eothschild 1 was 

 able to pay three visits (once in July and twice in August) last year to 

 his fen in Huntingdonshire, for the purposes of collecting Coleoptera, 

 etc. On the last occasion I was joined by my friend Mr. Willoughby 

 Ellis. A considerable part of the time was spent in fashing for water- 

 beetles, when most of the lodes and dykes were explored. The follow- 

 ing is a complete list of all the Hydradejihaga and HydrophiUdae which 

 were captured. I append a few notes to the rarer and more interesting 

 species. 



Hydradephaga. 



Haliplus con/inis SteTph., common. 

 „ fiavicallis Strm., scarce. 

 ,, variegatiis Strm., common. 

 ,, ruficollh DeG., common. 

 ,, wehnckei Gerh., scarce. 

 „ immaculatus Gerh., scarce. 

 I have to thank my friend, Mr. W. E. Sharp, for kind assistance in 

 identifying the rnficollis group. Most of these species appear to be 

 confined to particular dykes. Large numbers of Halipli were taken, 

 and the scarcity or otherwise of these captures is of course only based 

 on the results. 



LaccophilKs obsciirus Pz., common. 

 Hypliydrus ovatns L., common. 

 Coelambns versicolor ScbalL, common 

 ,, inaequalis F., common. 



,, decoratua GylL, common, but local. This is a local 



species in Britain. 



Coelandnis confI)(ensF., common. 

 Deronectes assimilis Pk., common. 

 ,, depressus F., common. 



„ 12i-pustiilatiis F., common. 



Hydroporas picttis F., common. 



,, yranidarig L., common. A rather local species. 



,, lepidus 01., common. 



„ haletisis F., common in one ditch. This is a very local 



Fen species. 



