SCIENCE-GOSSIP. 



SOME BKITISH DIVING BEETLES. 



By E. J. Burgess Son-. F.RMet.Soc, F.B.S.- 



(Concluded from page 293.) 



rTIHE wings (fig. 7) of both sexes of Dytisciis are when forty-five miles distant from land, and it not 

 -*- well developed and of ample proportions, infrequently happens during the summer and earl \ 

 which enable the insects to change their habitation autumn evenings that a water-beetle, probably 



I'h, 



IIIUTISII DYTISCI. Drain, h„ A'. ./. ///■ 



Sopp. 



s. Dytiscus punctulatvs Fab. Female, showing black under side. 9. D. circurnflexus Fab. 

 Male. lo. D. circumjtextis Fab. Male, showing markings on under side. 11. D. circumcinctus 

 A lir. Female, showing narrow border round eyes. V2. />. punctulatus Fab. Female. 

 13. D. lapponicus Gyll. Male, under side with lateral markings. 14. W. dimMiatus Berg. Male. 



at will. This they do towards dusk or after night- mistaking the light for the reflection of moonlight 



fall, in common with many other of the Dytiscidae. on water, flics into a house through an open door 



Darwin, in his "Origin of Species," makes mention or window. The insects usually ascend a water- 



of a Colymletes flying on board H.M.S. "Beagle"' plant or other elevation from which to start on 



