Carpenter and PmiAAPH^-Collemhola of SfiUhergen. 13 



Xenylla TuUberg. 

 Xenylla humicola (Fab.). 



This species, ranging from the Arctic regions to Europe, the Azore.s, and 

 North America, was first described from Greenland specimens. It is found 

 both on Spitsbergen and Bear Island, but it is apparently much scarcer than 

 Aclwrutes viaticus. All the Spitsbergen specimens are from Prince Charles 

 Foreland (one in moss on scree-slope at 300 feet, mouth of Glen Mackenzie, 

 6th July, 1921 ; two under stones on low hill near coast, 10th July, 1921). 

 Bear Island : south-west (four specimens under stones near Elassia Lake, 

 12th Juiae, 1921); Walrus Bay (five specimens among flowers oi Saxifraga 

 oppositifolia, 14th June, 1921); south centre of island (four specimens under 

 plants and stones on green hillock on barren, shattered Tetradium limestone, 

 14th June, 1921). 



Xenylla hiomcola was first recorded from Bear Island by TuUberg 

 (1876, p. 89), and from Spitsbergen by Schaffer (1900, p. 242), and by 

 Skorikow (1900, p. 202), who gives Anderson's Bay in Barents Land as the 

 locality. It has a wide Arctic, European, and North American distribution. 



Onychiurus Gervais. 



Lipura Burm. 

 Aphorwa MacGill. 

 Onychiurus armatus (Tullb.) var. arcticus TuUb. 

 This is another widely distributed insect, which occurs both on Spits- 

 bergen and Bear Island. Spitsbergen : Klaas Billen Bay (twelve specimens 

 among moss and Carex on edge of salt marsh, near Bruce City, 13th August, 

 1921); Gips Valley (among shingle under stones on raised beach near coast, 

 26th June, 1921). Bear Island: south inland region (eleven specimens by 

 shaking plants in a rich sheltered nook among rocks, 14th June, 1921); 

 Walrus Bay (four specimens, 15th June, 1921 ; one under stones on top of 

 low hill, 22nd June, 1921). 



Linnaniemi (1912, p. 87) is doubtless justified in regarding Tullberg's 

 Lipura ardica, described (1876, p. 39) from Spitsbergen specimens, as a 

 variety of the European Onychiurus armatus. Wahlgren (1899, p. 337) 

 records both typical armatus and arcticus from Bear Island, as well as 

 0. neglectus (Schiitfer), which is doubtfully distinct. The majority of the 

 specimens in the present collection are from 2'5 to 3 mm. in length, con- 

 siderably larger than typical European armatus, but not quite equal in size 

 to the Spitsbergen forms (4 mm. long) described by TuUberg. Skorikow 

 (1900, p. 201) records the species from Horn Sound (towards the southern 

 extremity of the West Island) and from Stans Foreland (Edge Island) ; he 



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