﻿Collemhola and Thysanura from the Forth Area, 197 



/. arhorea, L. ( = sensihilis, Tallb.). — Examples with the 

 typical three-toothed mucro were abundant among sphagnum 

 and other moss near Thornton (Fife) in Dec. 1905. 



Isotoma minuta, TuUb. — During the winter of 1905-1906 

 the people of Edinburgh were much alarmed by the presence 

 of small insects, erroneously referred to as " "Water-fleas," in 

 many of the hydrants and cisterns in the city. Specimens 

 were sent by the Sanitary Inspector to Dr K. H. Traquair, 

 who at once recognised them as Collembola, and referred 

 them to me for specific determination.^ The commonest 

 form by far, both in the cisterns and in the hydrant boxes, 

 was the white and blind Isotoma fimetaria (L.), Tullb. In 

 one phial, however, there were about a score of a smaller, 

 purplish species (scarcely 1 mm. in 

 length), agreeing in all essential points 

 with the descriptions of Isotoma minuta, 

 Tullb. They were taken from the sur- 

 face of the water in a cistern in Brunts- 

 field Avenue, Edinburgh, on 20th Dec. 

 1905. The foot and mucro ( x about 

 500) are here shown. The species does not appear to have 

 been previously detected in the British Isles. From one of 

 the hydrants a few examples of Templetonia nitida (Tempi.) 

 were obtained. 



TuUberg ^ found Isotoma minuta in great abundance in a 

 sawdust heap in Gotland, Sweden. Schaffer^ says, "Von 

 dieser Art habe ich in Februar 1896 viele Exemplare im 

 Keimkasten der SamenkontroUstation in Hamburg beo- 

 bachtet." Axelson,^ writing in 1900, says, "Diese vorher 

 nicht in Finland gefundene Art, scheint ziemlich allgemein 

 unter Blumentopfen in wohnzimmern and Treibhausern 

 vorzukommen." 



Anurophorits laricis, Mc. — Carribber, Linlithgowshire, 

 March, 1902; Cullalo, Fife, Feb. 1903; Isle of May, April 

 1908. 



1 Of. Sanitary Inspector's Report, March 1906. 



2 "Sveriges Podurider," 1872, p. 48. 



^ "Collembola der Umgebung von Hamburg," 1896, p. 183. 

 ^ " Neue Collembolen-Formen aus Finnland," 1900, p. 9 (Meddelanden of 

 Societas pro Fauna et Flora Fennica, h. 26). 



