1902.] 241 



B. glabrirostris, and, contrary to what I have observed in the many examples of 

 the latter which have come under my notice, the pale spot beyond the middle of 

 the third interstice is not continued across the third interstice. 



It appears doubtful whether the British species of this genus are, even now, 

 thoroughly known ; I took at Ranworth on July 24th, 1890, a specimen with excavated 

 presternum, third tarsal joint nearly twice as wide as the second, and the antennse 

 inserted at. the middle of the rostrum, which otherwise resembles B. alismatis, 

 Marsh., so closely that it stood in my series of the latter for a long time ; but for 

 the widened third joint of the tarsi this specimen might, having regard to the 

 variability in facies exhibited by the species of this genus, pass muster as B. 

 tempestivus, Herbst. — Id. : July 3CWA, 1902. 



Some water beetles of the Esher district. — As during the present year I have 

 had several opportunities of working the ponds of the Esher district, and have 

 turned up several unexpected species, a short account of my captures may be of 

 interest. Among the Ualiplidce nothing of importance was found, but Pelobius 

 tardus occurred plentifully in one or two places. Several Bidessus geminus were 

 taken out of a muddy pool, with a few Ceelambus iinpresso-punctalus, and one C. 

 conftuens and several C. versicolor were captured in a neighbouring pond. Ceelambus 

 incequalis was common. 



The best species of Rydroporus taken were H. obscurus, umbrosus and tristis, 

 the last two being, I believe, common in Scotland. Agabus Sturmi and nebu/osus 

 occurred freely. Ilybius fuliginosus and ater were plentiful, and a few /. fenestrates 

 were taken ; but the best species of this genus was I. amescens, which was in some 

 abundance in two ponds. Cope/atus agilis and llhantus exoletus were common, and 

 two Rhantus bistriatus were secured. Colymbeles fuscus and Aci/ius sulcatus were 

 abundant, and in one small pond I was delighted to find a number of Hydaticus 

 seminiger ; sixteen specimens were captured with one net in about an hour. 



This pond bears a close resemblance to those in which Mr. W. E. Sharpe takes 

 the insect, being thick and muddy without weed, and, as in Mr. Sharp's locality, 

 Copelatus agilis and Ceelambus impresso-punctatus occur with it. The species was 

 immature on September 6th. Dytiscus punctulatus and marginalis occurred in the 

 same pond, but D. circumjlexus was not found at all, although comparatively plen- 

 tiful in other localities near London. The common Oyrinus natator was abundant, 

 and in March a long series of G. minulus was taken ; they were swimming on 

 shallow water among sphagnum. The latter was not to be found this September, 

 although carefully searched for ; it has not, I believe, been previously recorded from 

 the south of England.— Stanley W. Kemp, SU, Oxford Gardens, Notting Hill, W. : 

 September l&th, 1902. 



Leemostenus complanatus, Dej., a British insect.— Mr. Champion's surmise in 

 the note on this insect in the last issue of this Magazine (p. 210) that it would 

 probably be found mixed with P. terricola in British collections proves correct in 

 my case. I at once carefully re-examined the supposed exponents of I', terricola 

 in my cabinet, and found of the eight that three were undoubtedly L. complanatus ; 

 these three were all taken together under bricks in a granary yard at Strood in 

 June, 1899. The differences between the two insects are quite striking, when 



