[151]

Berlin. ent. Zeitschr. xli. 1896, SB. p. 22.

[152]

Sharp, Ann. Soc. ent. Belgique, xxviii. 1884, CR. p. cvii.

[153]

For a more extensive account of Rhynchites betulae and others refer to Wasmann. Der Trichterwickler, Münster, 1884, and Debey, Beiträge zur Lebensund Entwickelungsgeschichte ... der Attelabiden, Bonn, 1846. The first includes an extensive philosophical discussion; the second is a valuable collection of observations.

[154]

Bull. U.S. Dep. Agric. ent. New series, No. 7, 1897.

[155]

Perris, Ann. Sci. Nat. (2) xiv. 1840, p. 89, pl. iii.