106 



THE ENTOMOLOGIST'S RECORD. 



In concluding these few notes I must acknowledge the assistance 

 I have received from my friends Mr. John Gardner and Mr. B. A. 

 Bower, and others in the naming of the more obscure species. 



Records of Local Coleoptera. II. — Hydrodephaga. 



By G. W. NICHOLSON, M.D., F.E.S. 

 I propose next to deal with the water-beetles. As, however, I must 

 confess to having hitherto neglected these, except on my visits to the 

 Cambfidgeshire fens, the present list will prove but a meagre one. I 

 do not propose to enumerate the majorit}^ of my Wicken captures, 

 since, although I have found nearly all the local rarities, these are well 

 known to occur there. 



A. Haliplid.e : — Brychiiis devatiis, Pz., Shelford, Cambs.; Idali/iliiH 

 ohlujnus, Er., Gravesend ; Aldeburgh, Suffolk; JH. amfiuis, Steph., 

 Epping Forest ; H. nmcronatiis, Steph., I have on several occasions 

 taken a single specimen in drains on Burwell Fen, but never at 

 Wicken; H. fi.nviatilis, Aube, Hartley Wintney, Hants. ; H. striatns, 

 Sharp, Gravesend ; H. inimaculatus, Gerh., Godmanchester, Hunts.; 

 Gravesend, by far the commonest species of the genus ; H. wehnrkei, 

 Gerh., Wicken Fen and Bishop Stortford ; Cneinidotus impressuK, F., 

 Gravesend. Mr. Balfour Browne has confirmed the difficult species of 

 Halipliis. 



B. Dytiscid^e : — Hi/droporus flavipes, 01., Hartley Wintney ; H. 

 oblonf/ns, Steph., Balrath, Co. Meath; H. umhrostis, GylL, Wicken Fen; 

 Aijabiis canspersHs, Marsh. ; exceedingly common at Gravesend; A. 

 abbien'atKs, F. Mr. Dollman very kindly gave me a plan of where he 

 had captured this species at Soham {Knt. Mo. Maf/., 191B, xlix., 14). 

 When I visited the spot, however, on May 15th, 1912, it was dried out. 

 It was with much pleasure, therefore, that, a few days later, I netted 

 a couple of specimens in a small pond on Wicken Fen. Plata)r,bits 

 viaciilatiis, L., I once took a specimen in flood-refuse on the towpath at 

 Kew ; llijbii(s fenestratHx, F., Bishop Stortford, Herts.; Rhantun, (/rapii, 

 GylL, Pulborough ; II. pnlveroHHn, Steph., Wicken and Burwell Fens; 

 R. notatus, Berg., very common at Gravesend ; Di/tiscns circunifiexitf, 

 F., Gravesend. 



On the Shedding of the Cornuti in Pyrausta aurata, Sc. 



(With four plates.) 

 By T. A. CHAPMAN, M.D. 



In the Eiito»iolofiist's Record for 1910, at p. 63, I gave an account 

 of certain remarkable structures in Peridea trepida, which are trans- 

 ferred from the male to the female in pairing, and referred to various 

 other species in which similar occurrences in a less extreme form take 

 place. 



Some of these are well known to various observers, but I do not 

 know of any actual record of them in any English publication. I take 

 courage therefore to report one of these, which I investigated some 

 years ago. The species I have selected is Pyrausta aurata {puniccalis). 

 There are one or two other species of the genus in which the same 

 facts may be observed. These are within the genus L'yrausta as 

 restricted by Stainton and Barrett. In the species included, beyond 



