4918 Insects. 



we must look for new water-beetles. Dr. Power, Mr. Babington, and 

 others have well searched the Fens of Cambridgeshire ; portions of 

 Yorkshire were diligently investigated by the late Mr. Rudd ; and I 

 devoted much of my time in my youth to explore the marshes and 

 broads of Norfolk, especially those of Horning and Wroxham. From 

 my success in the Lake districts of England in 1827, I would strongly 

 recommend a good examination of the Lakes of Cumberland and 

 Westmoreland, not neglecting the brooks and rills around Ambleside. 



As regards the mode of collecting water-beetles, Mr. Clark's instruc- 

 tions are so complete that I need not enter upon my own practice, 

 except to say that the rejectamenta left by floods in the early spring, 

 and sometimes collected on the surface of still waters and eddies near 

 mill-pools or in the angles of rivers, produce a rich harvest of water- 

 beetles, Carabidae, Staphylinidae, &c. In setting specimens for col- 

 lections I would recommend an example of each species to be placed 

 on its back, as the under sides often exhibit peculiar characters of 

 structure and sculpture which have been neglected in this famity, 

 where I believe they will be found more than usually characteristic. 

 As the elytra of these beetles are so smooth that they are easily 

 detached when affixed on their backs, a drop or two of nitric acid 

 may be added to the gum to make it more tenacious, which is the 

 basis of the powerful liquid glue of Paris called " Colle forte." 



As Mr. Clark invites criticism and solicits information, I will now 

 proceed to contribute what I think may forward his object. 



Such vague indications of localities as " Norfolk, Suffolk, &c," so 

 frequently occurring in our entomological works being useless to the 

 collector, I will subjoin what I can supply from my catalogues, con- 

 fining my remarks to the rarer species. It may be useful to state 

 that all such notices relating to the above counties which are inserted 

 in the ' Manual' and ' Illustrations' of Stephens were obtained from 

 Mr. Burrell's ' Catalogue of Insects found in Norfolk,' from myself 

 previous to 1824, and from Mr. Kirby's MSS. Mr. Burrell explored 

 the neighbourhood of Letheringsett, near Holt ; Mr. Kirby's collecting 

 was confined principally to Barham, Martlesham Heath and the 

 country on that side of Ipswich ; and my own researches extended 

 eventually over the greater portion of the two eastern counties. Much 

 uncertainty must exist as to the localities registered by Mr. Stephens, 

 from the fact that the specimens in his cabinet are, to a great extent, 

 incorrectly named ; they often do not agree with the descriptions ; a 

 very considerable number in the more extensive genera, which bear 

 the names of Gyllenhal and other continental authors, are merely 



