[765] Wester 1909.

[766] Czapek 1905, I. p. 515.

[767] Moreau 1916.

[768] Errera 1882.

[769] Schwendener 1862, p. 231.

[770] De Bary 1866-1867, p. 211.

[771] Gautier 1899.

[772] Herissey 1898.

[773] Czapek 1905, II. p. 257.

[774] Ronceray 1904.