18 INTRODUCTION. 



In both his memoirs M. Bourlet gives many details 

 concerning the external organisation and habits of the 

 CollemhoJa, but it is much to be regretted that he 

 was not more conversant with the literature of the 

 subject. 



Lucas^ places the Thysanuea between the Myeiapoda 

 and the Anoplura, adopts Templeton's genera Or- 

 chesella and AcJiorutes, and describes the following 

 species : — Orch. JiMcornis, Tem. ; 0. cinda, Tem. ; Or. 

 succincta, Guerin (which appears to consist of the 

 very dark specimens) ; Podura arborea, L. ; viatica, L. ; 

 plumhea, L. ; viUosa, L. ; annulata, Fab. ; aquatica, 

 L. ; nivalis, L. ; cinda, L. ; lignorum. Fab. ; pusilla, 

 L. ; vaga, L. ; amhulans, L. ; monura, Schrank ; fi7ne- 

 taria, L. ; nitida, Tem. ; nigromaculata, Tem. ; alho- 

 nn'da, Tem. ; cingida, Tem. ; fuliginosa, Tem. ; fas- 

 ciata. Say; hicolor, Say; iricolor, Say; Adiorutes 

 duhkis, Tem. ; muscorum, Tem. ; maritimus, Guer. ; 

 Smyntliurus signatus, Fab. ; viridis, Geof. ; polyiwdus, 

 L. ; ater, L. ; fuscus, Lacord. and Boisd. ; guttatus, 



Of the Lepismidoi he recognises three genera, MachiUs 

 with three species, Petrobius with one (our M. mariti- 

 onus), and Leplsma with eleven. 



In the 'Annales de la Societe Entomologique de 

 France' for 1842, M. Waga described" a TuewAcliorutes 

 under the name of A. bielanensis. This species does 

 not appear to have been as yet met with in "Western 

 Europe. 



The ' Transactions ' of the same society for the 

 following year contain a memoir by Mr. H. Lucas, 

 *' Sur les travaux qui depuis Latreille ont ete publics 

 sur I'ordre des Thysanures, et particulierement sur la 

 famille des Podurelles." ^ It does not contain any 



' ' Hist. Nat. des Crustaces, des Araclinides et des Myriapodes,' 1842. 



- " Description d'un insecte aptere qui se troiive en quantite aux 

 environs de Vai'sovie." Par M. Waga. ' Ann. Soc. Ent. France,' 1842, 

 p. 264. 



3 ' Ann. Soc. Ent. France,' 1843, p. 269. 



