268 THE CANADIAN ENTOMOLOGIST. 



Bergtoth, K. — Eutomologica Americana, VI., (1890) p. 233. 



Biiimek — Verhand der Kaiserlichen-Koniglichen Zoolbot. Gesellschaft in 

 Wien, XVII., p. 905. 



Brooks, George. — A Revision of the Genus Entomobrya Rond., Journ. 



Linn. Soc. ZooL, XVII., (1883) pp. 270-282, 2 pis. 

 Comstock, J. H. — An Introduction to the Study of Entomology, 1888, 



PP- 53-61, figs. 

 Fabricus, Otto. — Fauna Groenlandica (1780). 



Fitch, Asa. — Winter Insects of Eastern N. Y. — Amer. Jour. Sci. and 

 Agr., v., (1846) pp. 274-284. 

 — Eighth Rept. on Noxious Insects of N. Y. (1862), pp. 668-675. 



Humbert. — Review et Magazine Zoologie, (1868), p. 345. 



Lubbock, Sir John. — Monograph of the Collembola and Thysanoura, 

 Ray Society (1873). 



Nicolet, H. — Essai sur une Classification des Insectes Apteres de 1' ordre 

 des Thysanoures. — Ann. Soc. Ent. Fr. Ser. 2 (1847). 

 Tome V. 



Packard, A. S.— Proc. Bost. Soc. Nat. Hist., XIII., (187 1) p. 409. 



— Embryological Studies on Diplax, Perithemis and the Thy- 

 sanourous genus Isotoma — Memoirs Peab. Acad. 2 (1871), 

 p. 19. 



— American Naturalist, V., (187 1) p. 747. 



— Guide to the Study of Insects, 3d. ed., (1872). 



— Synopsis of the Thysanoura of Essex Co., Mass., with de- 

 scriptions of a few extra limital forms, — Ann. Rept. Peab. 

 Acad. Sci., v., (1873) pp. 23-51. 



— American Naturalist, VIII., (1874) p. 501. 



- — ibid., XI. (1877), pp. 51-52, foot-note. 



—ibid., XII. (1878), p. 383. 



Cave Fauna N. A. — National Academy Sciences, IV., (1886) 

 pp. 65-67, pis. 16, 17. 



Ryder, John. — Proc. Acad. Nat. Sci. Philad. (1878), p. 335, fig. 

 — American Naturalist, XIV., (1880) p. 375. 

 — Proc. Acad. Nat. Sci. Philad. (1881), pp. 79-86, figs. 



Say, Thomas. — Descriptions of the Thysanourae of the U. S. — Journ. 

 Acad. Nat. Sci, it, (1821) pp. 11-14; LeConte Edition, ir, pp. 7-9. 



