Vlll INTRODUCTION. 



Both tlie periodical publications on British Entomology so 

 often commended in our pages are continued with regularity 

 and with wonted utility and beauty. We recommend Mr. 

 Swainson's " Discourse on the Study of Natural History " 

 (lately published in " Lardner's Cyclopsedia ") to the attention 

 of entomologists ; it is well worthy their perusal. Among 

 the entomological works announced for publication, we may 

 mention " A Grammar of Entomology," by Mr. Newman ; 

 a similar work proposed by Mr. G. R. Gray ; a volume on 

 Genera, by Mr. Westwood ; '' An Essay on the British 

 Fossorial Hymenoptera," by Mr. Shuckhard ; a second edition 

 of Dr. Bevan's " Honey Bee ;" and also of Mr. Samouelle's 

 " Entomologist's Useful Compendium," &c. &Cv On the 

 continent, Leon Dufour's " Recherches sur les Hemipteres," 

 and Pictet's admirable " Recherches sur les Phryganides," 

 deserve our highest praise. Perty " On the Insects collected 

 in Brazil by Spix and Martins ;" Klug's " Symbolae Physicae, 

 or an Account of the Insects collected in Northern Africa and 

 Occidental Asia by Hemprich and Ehrenberg ;" and the Atlas 

 to the " Voyage de la Coquille," are all splendidly illustrated 

 folio works. Professor Gravenhorst, so justly celebrated for 

 his '^ Ichneumonologia Europaea," is about to publish descrip- 

 tions of the Staphilinites. Nees ab Essenbeck has issued a 

 second edition of his " Ichneumones Adsciti." Lastly, some 

 valuable observations on the Tenthrediuites and the Histeri- 

 tites, with characters of many genera and species before unde- 

 scribed, will be found in Klug's work on the Insects in the 

 Royal Museum at Berlin. 



We may add, that the increased, and still increasing, circu- 

 lation of the Entomological Magazine, renders its continuance 

 a matter of certainty. It was not projected as a source of 

 profit, nor has it hitherto yielded any ; what little may accrue 

 will be instantly expended in the colouring of plates, the 

 engraving of wood-cuts, or any other manner that may be 

 deemed acceptable to our Subscribers. 



