[151]

Nouv. Syst. Blattaires, 1865, p. 265.

[152]

The Cockroach, p. 170.

[153]

Cf. Duchamp, Rev. Sci. Nat. Montpellier, vii. [?1879], p. 423.

[154]

Huxley, Manual Anat. Invert. Animals, 1877, p. 416.

[155]

Riley, Insect Life, iii. 1891, p. 443, and iv. 1891, p. 119.