Monographie der Ordnung Thysanoptera, Königgrätz, 4to, 1895.
Bull. Essex Inst. xxii. 1890, p. 24; also Amer. Natural. xxx. 1896, p. 591.
Jordan in an interesting paper, Zeitschr. wiss. Zool. xlvii. 1888, p. 573, says that in the division "Terebrantia" there are only three pairs of stigmata.
Insect Life, i. 1888, p. 138.
See Lindeman, Bull. Soc. Moscou, lxii. 1886, No. 2, p. 296, and Uzel, Mon. 1895, pp. 397, 398.