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1522 be steamed, or even boiled, at no very great cost. — Henry Bull; Godalming, September 18th, 1846.

[I must plead guilty to editorial negligence, in printing Mr. Walker's paper with- out reading it: I am certain that gentleman would, at my suggestion, have explained or omitted the apparently startling propositions he has made : hops are several years before they arrive at perfection, and then remain in full vigour, twenty, thirty, and even forty years. The poles like the hops, are also, but not equally enduring, and their an- nual renewal would defeat the end of cultivation, viz. profit. — E. Newman].

List of British Dragon-flies, as corrected hy M. de Selys Longchamps. — In reprinting the following paper by M. de Selys Longchamps, I have omitted a number of sy- nonyms which seem of no interest, particularly in those species which were previously well-known by the names assigned to them by M. de Selys.

1. Libellula 4-maculata, L. and Stephens. M. de Selys states that the L. praenu- bila of Newman is a variety.

2. L. depressa, L. and Stephens.

3. L. fulva, Müller = L. conspurcata and L. bimaculata of Stephens.

4. L. cancellata, L. and Stephens.

5. L. cærulescens, Fab. and Stephens.

6. L. sanguinea, Müller = L. rufostigma of Newman, and L. rufostigma, L. ba- salis, and L. angustipennis of Stephens.

7. L. flaveola, L.

8. L. Fonscolombii, De Selys. A single specimen of this insect, previously un- noticed as British, is in the cabinet of Mr. Stephens.

? 9. L. vulgata, L. M. de Selys has not seen this insect in any British cabinet, but a single female specimen, taken at Hull, and in the cabinet of Mr. Dale, is referred to it with doubt.

10. L. striolata, Charpentier = L. vulgata of Stephens.

ILL. meridoinalis, De Selys. Two specimens of this insect, previously un- noticed as British, have occurred in the south of England, one is in the cabinet of Mr. Evans, of London, and the other in that of Mr. Wailes, of Newcastle.

12. L. scotica, Leach and Stephens. L. pallidistigma of Stephens, is an immature specimen.

13. L. dubia. Van der Linden = L. rubicunda of Curtis.

? 14. Cordulia metallica, Van der Linden. M. de Selys has not seen this species, and doubts its existence as British.

15. C arctica, Zetterstedt. The capture of a single specimen of this insect in Scotland, by Mr. Weaver, is noticed in a previous number of the ' Zoologist,' (Zool. 750) ; it is there called C. alpestris.

16. C. ænea, L. and Stephens.

17. C. Curtisii, Dale and Stephens.

18. Gomphus vulgatissimus, L. and Stephens.

19. Gomphus flavipes, Charpentier and Stephens.

20. G. forcipatus, L. A single female specimen of this insect, previously unknown as British, is in Mr. Stephen's collection.

21. Cordulegaster annulatus, Latrielle and Stephens.

22. Æschna pratensis, Müller = Æ. vernalis of Van der Linden and Stephens : it is also the Æ. teretiuscula of Leach.

23. Æ. mixta, Latreille = Æ. affinis of Stephens.