256 Proceedings of the Boyal Physical Society. 



same month, one under bark ; Ratho, March 1898, half a dozen in moss 

 ofif wall ; Craigentinny Meadows, on pieces of wood, Feb. 1899, common ; 

 Otterston Loch, March, a few floating on surface of the water. 



Achorutes manubrialis, Tullb. 



Only recognised as yet in a single locality, as mentioned 

 below. We know of no other record of the species for the 

 British Isles except that of Brook (1), who found it in 

 Thanet in October 1880. Abroad it is recorded from 

 Sweden, Finland, Germany, and South America. 



Local data.— Morton, near Edinburgh, 8th and 10th March 1899, a few 

 on the under sides of stones lying on earth by the roadside. 



Achorutes rufescens (Nic). 

 [Plate V. Fig. 8 ; Plate VIII. Figs. 19-22.] 



We have, as yet, found this form in but two localities in 

 the district : from its small size it is, however, easily over- 

 looked. Lubbock (7) records it from England, but does not 

 figure it. 



Apparently a rare species of discontinuous range. Eecorded 

 only from Sweden (by TuUberg, but queried by Schott), 

 Switzerland, and Great Britain. 



Local data.-— Braid Hermitage, one specimen among dead leaves, 15th 

 Oct. 1896 ; Longniddry, fairly common on rotting cabbage leaves, 28th 

 Sept. 1897. 



Genus Trisena, Tullberg. 



Trissna mirabilis, Tullb. 



[Plate VIII. Fig. 23.] 



It is a source of no little satisfaction to us to be able to 

 include this most interesting form in our list. Tullberg, 

 who first described the species (16), found his specimens 

 under pieces of wood in a cattle-yard, and among cast-up 

 seaweed in Sweden, and it has since been got by Brook (1) 

 under boards in a garden in England. We know of no other 

 records. Our specimens — about a score — were found float- 

 ing, to all appearance in a helpless condition, on the surface 

 of a stagnant ditch leading from a small marsh on the 



