[246]

Zeitschr. wiss. Zool. xxv. 1875, pp. 174-200, pl. xii.

[247]

Arch. f. mikr. Anat. xx. 1882, and xxi. See also von Adelung, Zeitschr. wiss. Zool. liv. 1892, p. 316.

[248]

The small space above lm left free from dots is, we presume, due to an omission on the part of Graber's artist, but we have not thought it right to interfere with his diagram.

[249]

Ann. Rep. Insects Missouri, vi. 1874, p. 159.

[250]

Wheeler, J. Morphol. viii. 1893.