ANNALES, XI.II (lOO?). 263 



ON SOME TERRESTRIAL ISOPOD CRUSTACEA 

 NEW TO THE FAUNA OF BELGIUM 



Ky Richard S. BAGNALL, F. E. S., 



(Wiulatou-oii-Tyue, Co. Durliam, Englaiid). 



Having had occasion to visit Belgium recently on business métiers 

 I was very fortunate and pleased lo make tiie acquaintance of 

 Dr. ScHOUTEDEN at Brussels, and under liis courteous guidance 1 

 was enabled to dévoie a couple of hours to collecting Thysanoptej'a 

 and ïsopoda in the hot-liouses of tiie Brussels Botanical Gardens on 

 Friday morning tlie 29'" of November, 1907. 1 aiso visited the 

 Antwerp Gardens for half-an-hour before dusk the following after- 

 noon. Thirleen species of woodiice were taken, and as five of thèse 

 were previously unknown to the Belgian Fauna they deserve, I 

 think, more than passing notice; hence the reason of this short 

 paper. The species now recorded as Belgian are Ligia oceanica L., 

 Ligidium hypnorum Cuvier, Uaplophllialmus Mengii Zaddach, 

 H. danicus B.-Lund, Trichoniscus pusillus Brandt, T. roseus 

 KocH, T. pygmœus G. 0. Sars, Philoscia muscorum Sgop., Onis- 

 cus asellus L., Platyarthrus Ho/fmannseggii Brandt, Metoponorlhus 

 pruinosus Brandt, Porcellio Rathkei Brandt, P. dilatatus Brandt, 

 P. pictus Brandt, F. scaber L., P. lœvis Latr., Cylisticus cou- 

 vexus Hartmann, Armadillidium viilgare Latr., A. nasatum 

 B.-Lund, A. pictum Brandt, A. pulchellum Zencker and A. sul- 

 catum M. -Edwards. 



TRIGHONISGID^. 



L — Genus TRICHONISCUS Brandt. 



The species of this genus are as a rule found in colonies and if 

 spécial attention were paid lo the Trichoniscidœ many inleresting 

 species would certainly be found in Belgium. T. Stehbingi Patience 

 and T. spinosus Patience hâve been described this year (1907) by 



