LIPUBA. 189 



Li/pur a ambulans, L. 



Podura terrestris nivea, De Gecr. Ges. de Ins. 



— — — Fabriciiis. Ent. Sys. 



— — — Latroille. Gen. Crus. et Insect. 

 Lipura ambulans, Burmeister. Handb. der Ent. 

 Anurophorus fimitarius, Nicolet. Mem. Soc. Helv. 

 Podura ambulans, Lucas. His. Nat. Crns. Ar. et Myr. 

 Adicranus Jimetarius, Bourlet. Mem. Soc. Roy. Douai. 

 Lipm-a aiuhidans, Gervais. His. Ins. Apteres, vol. iii. 

 Anurophorus ambulans, Nicolet. Ann. Soc. Ent. France, 1847. 

 Lipura — Lubbock. Trans. Linn. Soc, vol. xxiii. 



— — Tullberg. Skand. Podur. 



Plate XLIII. 



White. Prothorax short, but visible from above. 

 Body covered with scattered hairs. Post-antennal 

 organ consisting of twenty- eight elevations arranged 

 in two rows. Legs short. At the posterior extremity 

 of the abdomen are two short hooks, curved upwards. 

 Skin granular. 



Length •06 of an inch. 



Nicolet states that in this species the spiracles are 

 very easily visible, and he figures them distinctly in his 

 PL X, fig. 4. I believe, however, that these are 

 merely small depressions. He also says, " Les yeux 

 sont au nombre de vingt huit, divises en deux groupes 

 lateraux et disposes dans chaque groupe sur deux 

 lignes paralleles obliquant transversalement derriere 

 chaque antenne." It seems, however, very doubtful 

 whether this structure is really an organ of vision, and 

 Tullberg proposes to call it the " post-antennal " organ, 

 which seems a convenient term. 



Tullberg, who has paid great attention to this family, 

 gives the following description, which differs in some 

 respects from the preceding : 



Tumores utriusque organi postantennalis circulares, 

 12 — 14, majores. Puucta ocelliformia in basi anten- 

 narum bina. Unguiculus superior sine dente, inferior 

 ensiformis. Spinge anales magnre, arcuatse. 



Lono-. 2 millim. 



