106 THE BRITISH WOODLICE. 



are explored in which no collecting has been done, we may 

 briefly indicate the results which we obtained in the county in 

 question. 



It was not long before a species new to Britain — to wit, 

 Porcellio rat zeburgii — was found (74). This discovery was men- 

 tioned by Mr. Stebbing in the Victoria County History of Essex 

 (p. 71), and he prophesied that most of the British species then 

 would be met with in the county. We may safely claim to have 

 shown that his prediction was true, for we have been able to 

 record in the preceding pages no less than sixteen other species, 

 as will be seen from the following lists : — 



WOODLICE RECORDED EROM ESSEX. 

 Ligia oceanica 10. Porcellio pictus 



Ligidium hypnonim 11. Porcellio ditatatus 



Trichoniscus pusillus 1 2. Porcellio laevis 



Trichoniscus rose us 13. Porcellio rat zeburgii 



Haplophthalmns danicus 14. Metoponorthus pruinosus 



Oniscus aselhis 15. Cylisticus convex us 



Philoscia muscorum 16. Armadillidium nasatum 



Platyarthrus hoffmannseggii 17. Armadillidium vulgare 

 Porcellio scaler 



Of these Ligidium hypnorum calls for special mention, as it 

 had not been found in this country since Mr. Stebbing discovered 

 it in Surrey in 1873. Several of the Porcellios and Cylisticus 

 convexus have been met with in but few places, and the same may 

 be said of Armadillidium nasatum. 



Of the British species not as yet found in,* Essex Trichoniscus 

 vividus has at present only been recorded from Ireland ; Philoscia 

 couchii and Armadillidium depressum have not been collected 

 except in the extreme south west of England, while 

 Metoponorthus cingendus has hitherto only been noticed in 

 Devonshire and Ireland. The other four species, with the 

 exception of Porcellio rathkei, which is well distributed in west 

 Middlesex (and might have been expected to occur in Essex), 

 are still rare. In fact, for Trichoniscoides albidus but two British 

 localities are known ; for Haplophthalmns mengii three (two in 

 England and one in Ireland) ; while Armadillidium pulchelhim has 

 only been recorded from two or three places. 



In other counties quite as satisfactory results were obtained 

 as in Essex— a systematic search in Buckinghamshire brought to 



