DALYELL'S SCOTTISH HYDRACHNIDS 23 



anterior surface, black, considerably apart ; limbs with scanty 

 hairs ; colour greyish-brown, lighter on the middle of the back. 

 Taken in a small pond on Braid Hills." The paucity of hairs 

 on the limbs is suggestive of a species of Hygrobates. 



Hydrachna caudata and H. albator are undoubtedly Arrhemiri. 

 The figures show distinctly the generic subdivisions to which 

 each species belongs, but the absence of one or two details 

 does not allow of a closer verification of the specific names. 



Hydrachna geographica and H. maculata may correspond, the first 

 to Hydrachna geographica (Mull.), and the second to Limnesia 

 maculata (Herm.), though in the latter the colour is yellow 

 instead of red. 



Summarising the foregoing, the result appears to be as 

 follows : 



DALYELL'S SPECIES. EQUIVALENT IN PRESENT DAY NOMENCLATURE. 



H. cruenta . NON Hydrachna cruenta (Mull.), Krend. 



H. extendens . . Eylais extendens (Miill.). 



H. Crassipes . . Unionicola crassipes (Miill.). 



H. caudata . . ? Arrhenurus caudatus (Geer. ). 



H. papillator . . 1 ArrJienurus papillator (Miill.). 



H, albator . . t Arrhenurus albator (Miill.). 



H. geographica . ? Hydractma geographica (Miill.). 



H. maculata . . ? Limnesia maculata (Herm.). 

 H. varia. 



H. ferox. 

 H. sparsa. 

 H. spinifer. 

 H. punctata. 

 H. placida. 



Species named by Dalyell, the identification of 

 which is not possible. 



4 MEADOWBANK TERRACE, EDINBURGH. 



THE FALSE-SCORPIONS OF SCOTLAND. 



By ROBERT GODFREY, M.A. 

 (Concluded from p. 163, No. IT., July 1909.) 



Obisium museorum, Leach, 1817. 



O. museorum was first recorded for Scotland in 1 8 1 7 by Leach, 

 who adds to his original description of the species the remark, " In 

 montibus Caledoniae vulgatissime, in Anglia rarius." Leach was in 



