INSECTA. 675 



published a valuable memoir on the Anatomy ot this group, m tne twelfth volume of Annals of Natural History. 

 The extensive tribe of ilites, Acarides (p. 469), has received great additions, especially by Koch and Gervais, 

 the latter of whom has arranged the numerous genera of which it is now composed into seven groups, having for 

 their types, the genera Bdella, Trombidion, Hydrachna, Gamasus, Ixodes, Tyroglyphus and Oribates. The 

 BdeUides have been revised by Van Heyden and Koch ; the water Mites, Hydrachnse, Gamasi and Oribatides 

 by Koch (Uebersicht, &c., Part III). And a valuable memoir on the Anatomy of the Acari, has been published 

 by Dujardin. (Ann. Sc. Nat. third series, Vol. III.) 



A singular discussion has been published in the Annals of the French Entomological Society, Vol. VIII, rela- 

 tive to a species of Oribates, regarded by M. Robineau Desvoidy as a Coleopterous insect, to which he gave the 

 name of Xenillus clypeator. Another species of Mite has also been the subject of much discussion, it having been 

 asserted by Mr. Weekes that it was developed by the means of galvanic action. 



Several other species of great singularity have lately been described, which have also attracted much attention 

 from their infesting the bodies of man and the higher animals ; the Acarus foUiculorum found within the pores 

 of the nose, discovered by M. Simon, has been generically named Simonea by Gervais ; Entozoon by Erasmus 

 Wilson ; and Demodcx by Professor Owen. A second species has been described by Mr. Tulk, found upon a dog. 



Another very singular animal described by Doyere, under the name of Tardigradus, found upon the ochre- 

 colouied slime covering the eggs of frogs, and capable of being brought to life again, after being completely dried 

 up, and which was long regarded as one of the Infusory Zoophytes, has more recently been considered as a very 

 degraded type of the present tribe. 



INSECTA IN GENERAL. (P. 471—472.) 

 .Since the publication of the former edition of this translation, a great number of Entomological 

 worlcs have been published, in many of which the classification of the orders of insects laid down by 

 Latreille, has been departed from ;* the greater portion of these works, however, are treatises more 

 or less extended, upon the various natural families or higher groups of insects, elaborated with great 

 care ; and which, in consequence of the vast additions to our collections received from distant coun- 

 tries, for the most part previously unvisited by the collector of insects, would render a complete re- 

 vision of the work before us necessary, modifications in the arrangement of almost every group, often 

 to a very great extent, having been proposed. It will be impossible of course, in a short supplement 

 like the present, to do more than direct the attention of the student to the chief of these works, no- 

 ticing where possible, and as concisely as can be, the more material alterations which have been 

 proposed. 



Of these recently published works, several of the most valuable consist of treatises which have 

 appeared in the pages of periodical works expressly devoted to Entomology. These are the Transac- 

 tions of the Entomological Societies of London and France; the Entomologische Zeitung of the 

 Stettin Entomological Society ; the Zeitschrift fur die Entomologie of Dr. Germar; the Linnsa Ento- 

 mologica ; and the Entomologist, edited by Newman ; besides the more general periodicals, such as 

 the Annals of Natural History; the Annales des Sciences Naturelles ; the Revue Zoologique; the 

 Zoologist; the Bulletin of the Natural History Society of Moscow; the Transactions of the Boston 

 Society of Natural History; and the Linnaean Society of London; as well as of various Continental 

 and American Societies and Academies. 



Other works expressly devoted to the insects of various orders in general, or confined to separate 

 localities, are also especially to be mentioned, amongst these are the insects of the Voyage of D'Or- 

 bigny, undertaken by order of the French Government, described by Brulle and Blanchard. The 

 insects of the Canary Islands, by Webb and Berthelot ; the insects of Algeria, collected and de- 

 scribed by Lucas, and also published in the great French National Work on that country ; the Ar- 

 cana Entomologica, and the Cabinet of Oriental Entomology, published by the author of the present 

 supplement ; the insects of the Voyage of the Erebus and Terror, described by Mr. A. White ; and 

 the Indian insects collected by M. Delessert, described by Gue'rin Meneville. 



The continuation of the great work of Panzer on the insects of Germany, by Koch and Herrich 

 Schafi'er, contains representations of a vast number of new species, and many new forms, especially 

 among the more obscure tribes of insects. The insects of Van Diemen's Land and other parts of Aus- 

 tralia, have been described by Erichson in his Archives ; Dr. Germar in the Linnsea Entomologica ; and 



» This is singularly the case in a work on the natural arrangement of insects, by Swainson and Shuckard, 

 pubhshed in the Cabinet Cyclopaedia, to review which, would be a waste of labour. The same may be said with 

 respect to the septenary system developed in Mr. Newman's Introduction to the History of Insects and System 

 of Nature. 



