THE PSEUDOSCORPION-FAUNA OF THE BRITISH ISLANDS. 123 



undertaken for the false-scorpions of any region. The British 

 fauna is believed to comprise eight species. They are not all 

 regarded as new ; but oddly they all receive new names, the 

 older names of Hermann and Latreille and " Chelifer jasciatus " 

 of Leach himself being reduced to synonyms. The classification 

 and nomenclature are as follows : 



Family Scorpionidea. 

 Genus Chelifer. 



Sp. 1. Chelifer Hermanni. 

 Sp. 2. Chelifer Latreillii. 

 Sp. 3. Chelifer Olfersii. 

 Sp. 4. Chelifer Geoffroyi. 

 Sp. 5. Chelifer museorum. 



Genus Ohisium. 

 Sp. 1. Ohisium orthodactylum. 

 Sp. 2. Ohisium museorum. 

 Sp. 3. Ohisium maritimum. 



These eight species are dealt with in synoptical fashion and 

 figured. The diagnoses, however, are meagre ; and the figures, 

 on copper plates by K. P. Nodder, are poor. Taken together 

 they are insufficient, except perhaps in the case of " Chelifer 

 museorum,^'' for the determination of the species. Thus it 

 happens that most of the names have been, by one author or 

 another, misapplied ; and in some cases the species intended, 

 having been redescribed, became widely known under other 

 names. The specimens on which the work was based, however, 

 are preserved in the British Museum (cf. Cambridge, 27). They 

 have been obligingly shown to m€ on several occasions — acknow- 

 ledgments must be made in this connection to Mr. R. I. Pocock, 

 Dr. W. T. Caiman, and Mr. A. S. Hirst — and detailed micro- 

 scopical examinations have been made of them. There are 

 eighteen specimens, representing the eight names above men- 

 tioned. They bear numbers corresponding to entries in the old 

 catalogue-book of Leach's collections, and one individual in 

 each case is indicated as the type. The specimens are dry, 

 i.e. set out on card, and while some are in poor condition, the 

 collection as a whole is well preserved. 



JouRN. Q. M. C, Series II.— No. 79. 10 



