COLLEMBOLA OF MINNESOTA 97 



sembles, both being entirely white and eyeless. Schott found this 

 spcies in California and, in referring to Packard's record of L. 

 fimetaria, he says: "Ohne Zweifel meint Packard mit L. fimetaria 

 obige Art wenn er in seiner Beschreibung sagt : "It may be 

 known from L. ambulans, with which at first it may easily be 

 confounded, by wanting the hooks at the end of the abdomen." 

 I have taken but few specimens of this species. They were 

 found in damp places, on the under side of stones, and were 

 not very active. 



Aphorura ambulans (L., Nicolet). . 



PI. XII, Figs. 3-7. 



1758. Podura ambulans. Linne, Syst. Nat. Ed. X. p. 609. 



1847. Anurophorus ambulans. Nicolet, Essai Classif. I'Ord. Thys. p. 384. 



PI. VI, 14. 



1862. Lipura ambulans. Lubbock, Notes on the Thys. Pt. II. p. 600. 



1869. Lipura ambulans. Tullberg, Skand. Podur. af. Underf. Lipur. p. 17. 



1871. Lipura ambulans. Tullberg, Fort. ofv. Sver. Podur. p. 154. 



1872. Lipura ambulans. Tullberg, Sver. Podur. p. 55. PI. XI, 16-29. 



1873. Lipura ambulans. Packard, Thys. Essex Co., Mass. p. 29. 



1873. Lipura ambulans. Lubbock, Monogr. Coll. and Thys. p. 189 PI. 



XLIII. 

 1893. Lipura ambulans. Schott, Palsearct. Coll. p. 87. 



1895. Lipura ambulans. Reuter, Finl. Coll. p. 33. 



1896. Lipura ambulans. Lie-Pettersen, Norg. Coll. p. 20. 

 1896. Aphorura ambulans. Schaffer, Coll. v. Hamburg, p. 161. 



"Elevations of each post-antennal organ 12-14. Ocelliform 

 punctures at the base of each antenna 2. Anal spines large, ar- 

 cuate. Length, 2 mm.," says Tullberg. 



Body entirely white^ with a few scattered hairs. Protho- 

 rax short, but visible from above. The skin is finely granular. 

 The post-antennal organs are not easy to make out ; they are elon- 

 gate, consisting each of a double row of elevations. The antenna; 

 are quite peculiar in form, as may be seen by referring to the 

 figures. The species is quite abundant, under bark and sticks 

 in damp places. They are often found in colonies so that one may 

 take many at once. I have taken them with our other albino 

 collembolans : Cyphodeirus albinus and Isotoma fimetaria. 



