THE FALSE-SCORPIONS OF THE WEST OF SCOTLAND 163 



Whyte and I obtained the moulting nests of the species between 

 the tightly-sewn pieces of harness leather. 



IDEORONCUS CAMBRIDGII (L. KocJi). Though as yet undetected on 

 the East coast, this is a widely distributed species on the West, 

 ranging from Balmacara, Ross-shire, through Argyll and Ayr, 

 to the Solway Firth. It occurs on several of the islands, as 

 on the Maiden Island and Kerrera at Oban, and on the Rough 

 Island in the Solway ; abounds on natural ground near the sea, 

 and ranges inland to Ben Cruachan and the western shore of 

 Loch Awe. In spite of its abundance, nothing is yet known 

 concerning its reproductive habits, and no evidence is yet 

 forthcoming of any nest-building habits in this species. 



OBISIUM MARITIMUM, Leach. The only Scottish locality for this 

 species yet known is at the head of Loch Fyne, near Shirvan, 

 where it was discovered by Mr. Henry Drummond Simpson 

 and myself in September 1904. It lives under stones below 

 high-water mark, and constructs nests for moulting and for 

 reproduction. 



OBISIUM MUSCORUM, Leach. Universally distributed from Strome 

 Ferry and the hills of Skye to the Solway Firth. I have 

 personally taken it in Ross, Skye, Argyll, and small islands off- 

 shore, Dumbarton, Lanark, Renfrew, Ayr, and Kirkcudbright. 



This species, like the two species of Chthonius hereafter 

 mentioned, constructs nests for the various purposes of moult- 

 ing, hibernating, and reproduction. 



CHTHONIUS TETRACHELATUS (Preyss}. Next to O. mitscorum the 

 present species is probably the most widely-distributed of our 

 Scottish False-scorpions. In the western counties, it has been 

 taken in Argyll, Renfrew, Ayr, and Kirkcudbright. Besides 

 haunting natural hillsides, this species occurs about farm- 

 steadings, and is frequently to be obtained about empty flower- 

 pots and old bricks in conservatories. My observations on 

 the nest-building habits of this species were first carried out in 

 Ayr and Argyll. 



CHTHONIUS RAYI, L. Koch. The most northerly haunt known for 

 this species in Scotland is at Balmacara, West Ross, where 

 Messrs Whyte and I took about two hundred specimens in the 

 autumn of 1906. It is recorded from Oban by Mr. Evans, 

 and was taken near Dalbeattie by Mr. Aird Whyte in January 

 1907. 



in FINLAY DRIVE, DENNISTOUN, 

 GLASGOW. 



