INTRODUCTION. 13 



Podura plumbea = Tomocerus plumbeus. 



iiitida Templetonia crystallina, 



nigromaculata Degeeria annulata. 

 albocincta ,, albocincta? 



cingula Orchesella cincta. 



fiTliginosa Isotoma avborea. 

 stagnorum ,, palustris. 



Achorutes dubiiis Acliorutes dubius. 



„ muscoriim Anoura niuscorum. 



Smyntliurus viridis Papirins Saundersii. 



„ atra Smyntliurus fuscus. 



„ signata Papii-ius nigromaculatus. 



His P. cingula is, I tliink, founded on a young speci- 

 men of 0. cincta. His 8. viridis is not the species so 

 named by Fabricius and other authors, but Papirins 

 ornatus. So also his S. signata is not the 8. signata of 

 old authors, but my Papirius nigromaculatus. 



Mr. Westwood has prefaced Mr. Templeton's paper 

 by some valuable introductory remarks. He points out 

 the interesting character of the group, both from its 

 structural peculiarities and also " from the rank which 

 they hold amongst annulose beings, being one of those 

 qucestiones vexatce which it is most desirable should be 

 set at rest." 



Burmeister,^ in 1835, placed the Thysanuea between 

 the Liotheidce and Blattidm. He gives for the Poduridce 

 the following characters : — " Antennse corpore breviores, 

 filiformes ; oculi compositi nuUi ; partes oris abscon- 

 ditse, palpi 4 brevissimi, inarticulati, dentati, setigeri ; 

 tarsi 1 — 2 articulati." 



He adopted the genera Achorutes, Podura, Orchesella, 

 and Smynthurus, adding, as already mentioned, a fifth, 

 " Ziptira,^^ for the species without a spring tail. This 

 was a decided improvement. He also proposed the 

 name Choreutes for the species of Podura with long 

 antennse, at the head of which he placed Linngeus's P. 

 plumhea. This name has not been adopted by subse- 

 quent writers, having been already used for a genus of 



In the 'Comptes Rendus ' for 1836' M. Guerin 



' ' Handbucb der Entomologie.' 



- ' Comptes Rendus de I'Acad. des Sciences,' 1836, vol. ii, p. 595. 



