ISOTOMA. 167 



In considerable numbers under the bark of decaying 

 live oak, &c., in Greorgia and East Florida. 



Isotoma, Bourlet. 



Body cylindrical ; segments subequal ; seven eyes in 

 each group ; antennae four-jointed, shorter than the 

 body. No scales or clubbed hairs. Feet biunguicu- 

 late ; caudal appendage long. 



Isotoma arborea. 



Podura campestris nigra, De Geer. Acta Soc. Upsal, 1740. 



— arborea nigra, „ Ges. de Insect, vol. vii. 



— — — Linn. Fauna Suec. 



— — Linn. Sys. Nat. 



— — Schrank. En. Ins. Austrise. 



— — Muller. Zool. Dan. Prod. 



— — Fabricius. Ent. Syst. 



— — Latreille. Gen. Crus. et Insect. 



— — Burmeister. Handb. de Entom. 



— — Boisd. and Lacord. Fauna. Env. Paris. 



— fuliginosa, Templeton. Trans. Ent. Soc, vol. i. 

 Isotoma arborea, Bourlet. Mem. Soc. Roy. Lille, 1839. 



— rubricauda, Bourl. Mem. Soc. Roy. Douai, 1842. 

 Desoria cylindrica, Nicolet. Mem. Soc. Helv., 1842. 



— jjallida, „ „ „ „ 



— ebriosa, „ „ „ „ 

 Podura arborea, Bourlet. Mem. Soc. Roy. Donsd, 1842. 



— — Lucas. His. Nat. Crus. Ar. et Myr. 



— fuliginosa, ,, „ „ 

 Desoria ebnosa, Gervais. His. Ins. Apt. , vol. iii. 



— cylindrica, „ „ „ 



Isotoma — Porath. Of. af. k. Yeteusk-Akad. Forh., 1869. 



De Geer's description of this species is the following : 

 — Podura oblonga nigra, antennis quadrinodiis ; pedi- 

 bus furcaque pallide fuscis. 



Black, legs and spring pale ; eyes black ; antennee 

 scarcely longer than the head, with segments nearly 

 equal in length. The whole body, including the legs 

 and antenna3, is clothed with short hairs. The spring 

 is short, and does not reach to the ventral tube. 



