82 COLLEMBOLA OF MINNESOTA 



Cyphodeirus albinus Nic. 

 PI. VIII, Figs, 9-1 1. 



1783. Crystalpoduren O. Fabricius, Danske Vidensk. Selsk. p. 303. 



1842. Cyphodeirus albinus. Nicolet, Hist, des Podurelles. p. 67 PI. 



VII, 7 



1844. Lepidocyrtus albinos. Gervais, Hist. Nat. Ins. Walckenaer. Vol. III. 



1867. Lepidocyrtus albinos. Lubbock, Notes on the Thys. Pt. III. p. 301. 



1871. Cyphoderus albinus. Tullberg, Fort. ofv. Sv. Podur. p. 150. 



1872. Cyphoderus albinus. Tullberg. Sver. Podur. p. 38. PI. VI, 12-21. 



1873. Beckia albinos. Lubbock, Monogr. Coll. and Thys. p. 49. PI. XXIV. 

 1890. Cyphoderus albinus. Uzel, Thys. Bohem. p. 49. 



1893. Cyphoderus albinus. Schott, Palsearct. Coll. p. 44. 



1895. Cyphoderus albinus. Reuter, Finl. Coll. p. 16. 



1896. Cyphoderus albinos. Schaffer, Coll. v. Hamburg, p. 199. 



1896. Tullbergia immaculata. Lie-Pettersen, Norg. Coll. p. 16. PI. II, 1-4. 



Described by Nicolet as "Oblong, entirely white, Ant. I 

 and III short and obconiform in shape; Ant. II and IV much 

 larger and oblong. Body slightly hairy and very brilliant. In- 

 sect very agile, about i mm. long. Inhabits worm-eaten trunks 

 where it lives socially (on il vit en rassemblement nombreux), 

 and under mosses of forests where it lives solitary. Very com- 

 mon, especially in Autumn and in early winter." 



Aside from the very short description given by Tullberg: 

 "Undique albus. Ocelli nulii. Unguiculus superior uno dente 

 magno armatus. Long, i mm.," we look in vain for a helpful 

 characterization of this species until 1896, when O. J. Lie- 

 Pettersen, in his "Norges Collembola," attempted to base his 

 new genus, Tullbergia, on this species. His figures agree 

 pretty closely with those of Nicolet and Tullberg. Thae latter 

 has, however, overlooked the smaller tooth on the superior 

 claw, quite likely on account of insufficient material, as he speaks 

 of it as found "sparsamt." His figure of the claw indicates that 

 he did not get a true profile view, as it seems unusually narrow. 

 When the claw is thus tipped to one side, the lesser tooth is only 

 with difficulty visible. Not improbably, too, different localities 

 may produce individuals differing slightly in their minute char- 

 acters. As to the presence of clavate hairs on the tibia, there 

 seems to be some doubt ; Tullberg's figure shows a hair with 

 very slightly swollen tip, while Lie-Pettersen states that they 

 are not present. The figure given by the latter really shows 



