INSECTA. 677 



THE ORDER MYRIAPODA. (P. 482— 48G.) 



The classification as well as the characters of this tribe of insects has advanced towards perfection with rapid 

 steps since the days of Latreille ; although Naturalists are still as much at variance with respect to their real 

 relations. Thus, whilst M. Brandt adopts the views of Latreille, and even M. Gervais (Hist Nat. Ins. Apt., Ill, 

 p. 54), seems inclined to prefer regarding them as vermiform insects rather than as forming a separate class, 

 equal in value to the Insecta, Arachnida and Crustacea, Mr. Newport, taking up the views of Strauss, (Cons, 

 gener. sur I'anat. des an. art. p. 16) and some earlier authors, considers them as most nearly allied to the An- 

 nelida, placing the sub-kingdom Articulata at the head of the Invertebrata, commencing with the Hexapod 

 insects, followed by the Spiders, Crustacea, Myriapoda, Annelida, and the remainder of the Articulata, (Trans. 

 Linn. Soc, XIX, 271.) 



The three authors above-mentioned, Brandt, Newport, and Gervais, have especially studied these insects. 

 Newport has retained the binary division and names Chilognatha and Cliilopoda of Latreille, but Gervais has 

 adopted the views of the Baron Walckenaer, and employed the name of Diplopoda for that of Chilognatha. 

 The arrangement of Mr. Newport of the class given in the Linnoean Transactions is as follows: — 

 Order I. — Chilopoda Latr ; Syngnatha Leach. 



Tribe 1. Schizotarsia; Fam. 1. Cermatiidse, 1 genus. 

 Tribe 2. Holotarsia ; Fam. 2. Lithobiidae, 2 genera. 



Fam. 3. Scolopendridse, 8 genera. 

 Fam. 4. Geophilidas, 5 genera. 

 Order II. — [Diplopoda Walckenaer] ; Chilognatha Latreille, Newport. 

 Tribe 3. Pentazonia ; Fam. 5. Glomeridse, 3 genera. 

 Tribe 4. Monozonia ; Fam. 6. Polyxenidse 1 genus. 



Fam. 7. Polydesmidse, G genera. 

 Tribe 5 Bizonia ; Fam. 8. Julidae, 8 genera. 



Fam. 9. Polyzonidae, 2 genera. 

 Fam. 10. Siphonophoridse, 1 genus. 

 The works of the authors above mentioned, must be referred to not only for descriptions of the 300 known spe- 

 cies of the order, but also for many valuable observations on their structure, anatomy, and development from the 

 egg state, as well as a memoir by M. Waga, on the Myriapoda of the environs of Warsaw ; various detached 

 memoirs by M. Lucas ; the article Myriapoda by R. Jones, in Dr. Todd's Cyclopaedia of Anatomy and Physiology. 

 Also a memoir on the genus Scutigera Lam. (Cei-matia lUiger), published by R. Templeton, in the Transactions 

 of the Entomological Society of London, Vol. Ill ; and a memoir by Mikan, on the luli of South America, 

 published in the Isis for 1834. 



In the Supplement to the 4th Volume of the Histoire Naturelle des Insectes Apteres, the Baron Walckenaer 

 has introduced a new mode of discriminating the difficult species of the genera Heteristoma and Scolopendra, by 

 the number of joints in the Antennae, varying from twenty-five to eleven. 



THE ORDER THYSANURA. (P. 486— 4S8) 



The researches of the Abbe Bourlet on the Thysanurae of the North of France, and of M. Nicolet on those of 

 Neufcbatel in Switzerland, must be consulted. The former have been published in the Memoirs of the Societies 

 of Lille, (1839), and of Douai, (1843), and the Revue Zoologique, 184.5 ; and the latter in the Memoires de la Societe 

 Ilelvet. des Sci. Natur, 1842, and in the Annales of the French Entomological Society for 1847. These works, 

 (except the last), with various detached articles on the suliject, have been employed by M. Gervais in his work on 

 these insects, introduced into the 3rd Volume of the Hist. Nat des Apteres, in which the genus Podura is divided 

 into eiglit groups or sub-genera, several of which have received synonymical names by the different authors 

 above named. Several other genera are added in M. Nicolet's last memoir. 



The Lepismenae have received the addition of two singular genera, Nicoletea and Campodea, both having the 

 body destitute of scales, and very much resembling the larvae of Staphylinidoe. 



The relations of this order have also been the subject of consideration ; Burmeister ranging them next to the 

 Orthoptera, whilst Gervais regards the Lepismidae as Neuropterous insects stopped in their development. 



THE ORDER PARASITA. (P. 488.) 



The fine Monograph of Mr. Denny upon the British species of Parasita, has materially increased our knowledge 

 of these insects ; a great number of species being for the first time described and beautifully figured in the 

 twenty-six plates with which the work is illustrated. The species are here arranged according to Nitzsch's dis. 

 tribution, as published in Germar's Magazine, one sub-genus only being added for the reception of the species 

 found on the common Swift, and named Nitzschia Burmeisteri. Burmeister's articles on this order in his Genera 

 Insectorum, must be consulted, as well as a valuable article on the structure of the mouth of the Pediculi, in the 

 Linnaea Entomologica by the same writer. 



THE ORDER SUCTORIA. (P. 489.) 

 A summary of the species of Pulex has been given by (Jervais, in the 3rd Volume of the Histoire Naturelle des 



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