Collembola and Thysanura of the Edinhurgh District. 261 



district in kitchens, bakehouses, and other places where a 

 certain amount of artificial heat is rarely wholly wanting ; 

 but in our experience it is less frequent in dwelling-houses 

 now than formerly. Abroad it occurs over the greater part 

 of Europe and in North Africa, etc. 



Local data.— In a bakehouse, Newington, Edinburgh, 1881 ; in cottage, 

 Grange, Edinburgh, 1896 ; Morningside Dairy, under sacks in engine-house, 

 abundant, Nov. 1896 ; kitchen in Buckingham Terrace, Edinburgh, April 

 1898 (Dr Sprague) ; in dwelling-house, Penicuik, many years ago ; Aberlady, 

 Sept. 1886 ; St Andrews, Aug. 1895 (from Mr J. W. Young) ; etc. 



[Thermobia domestica (Pack.). 



Thermolia furnorum (Eov.). 



In the beginning of 1877 Mr James Simpson found a 

 Lepismid in large numbers in the engine-room of a biscuit 

 factory, then in Earl Grey Street, Edinburgh, and sent 

 specimens to the late Dr Buchanan - White, who, being 

 unable to name them, published a diagnosis (as " Lepisma 



? ") in the February 1877 number of the Scottish 



Naturalist (vol. iv. p. 46). In April a fuller note by Mr 

 Simpson was communicated to the Royal Physical Society, 

 and afterwards printed in the Proceedings (Vol. IV. p. 187). 

 As Mr R. M'Lachlan has pointed out in the Entomologist's 

 Monthly Magazine for 1895 (p. 75), there is no doubt that 

 the insects in question belonged to the above-named foreign 

 species, whose discovery about ovens in bakehouses in Lon- 

 don and Cambridge formed the subject of several interesting 

 notes in the 1894 volume of the magazine just mentioned. 

 Mr Simpson tells us he does not now possess any specimens 

 of the Edinburgh Lepismid, a microscopic slide of scales, 

 which he has kindly sent us, being the only relic he has ; 

 and we have been unable to discover whether the creature 

 still exists in Edinburgh. 



Thermohia domestica may be known from Lepisma sac- 

 charina by its larger size and variegated appearance, as well 

 as by the structural difference in having 6 -segmented instead 

 of 5-segmented maxillary palpi. It has been recorded from 

 the United States, Italy, and Holland ; and if it be identical 

 with the Lepisma parisiensis of Nicolet, its occurrence in 



