138 TOMOOERUS. 



diameter of the branch being at that place y^^ths of 

 an inch. 



Norway, Sweden, Switzerland, France, England. 



Tomoccrus plumheus, Linn. 



Podura teres plumhea, Linn, Fauna Suec. P 



La Podura grise commune, Geoifroy. Ins. Env. Paris. 



— violette „ „ ,, 



Podura corpora teriti nigrocceriileo phimbeo, De Geer, Ges. d. Ins. 



— plumbea, Linn. Sys. Nat. 



— — Sclirank. Eut. Ins Austrise. 



— — Fabricius. Ent. Sys. 



— — O. Fabricins. Fauna. Greenl. 



— — MiiUer. Zool. Dan. Prod. 



— — Latreille. Gen. Crus. et Ins. 



— — Boisd. et Lac. Faun. Ent. Env. Paris. 



— — Temp. Trans. Ent. Soc, vol. i. 



— gigas, O. Fabr. Kong. Danske. Vid. Sels. Skr., 1783. 

 Choretdes plumbeus, Burm. Handb. d. Entom. 

 Macrotoma plumhea, Bourlet. Mem. Soc. Roy. Lille, 1839. 



— — „ „ „ Douai, 1842- 

 Podura plumhea, Lucas. His. Nat. des Crus. Ar. et Myr. 

 Macrotoma 231^)71160, Gervais. His. Ins. Apteres. 



— minor, Lubbock. Trans. Linn. Soc, 1862. 



— ^ZiMJiftea, Poratli. Of. af k. Yeteusk.-Akad. Frok., 1869, 



Like the preceding in general outline and colour, it 

 is, however, smaller. The antennae are shorter than 

 the body, which, without the scales, is of a dull leaden 

 colour. As in the other species of the genus the 

 anterior segment has certain pale, oblong, elongated 

 markings. The large claw at the extremity of the 

 tarsus has six minute teeth on the under side. The 

 black spines on the second segment of the saltatory 

 appendage are much larger than in T. plumhea, and 

 some have latei^al projections. 



Under logs of wood, with T. plumhea, throughout 

 the year. This species seems very indifferent to cold ; 

 I found it common all through the winter, even during 

 sharp frosts. 



The largest specimens are as much as 3-th of an inch 

 in length ; but the majority are smaller. 



The first abdominal segment is shorter than the two 



