[16] See R.H. Stretch and C.D. Gibbes, Proc. California Acad. of Sciences, iv. pp. 265 and 266.
[17] A Complete History of Drugs (translation), p. 169 (London, 1748).
[18] F. Porter Smith, Contrib. towards the Mat. Medica ... of China, p. 100 (1871).
[19] R.F. Burton, First Footsteps in E. Africa, p. 178 (1856).
[20] A.S. Packard, jun., Guide to the Study of Insects, p. 205 (Salem, 1870).
[21] On the Cecidomyids of Quercus Cerris, see Fitch, Entomologist, xi. p. 14.
[22] See, on Cecidomyia oenephila, Von Haimhoffen, Verhandl. d. zoolog.-bot. Ges. in Wien, xxv. pp. 801-810.
[23] See Entomologist’s Month. Mag. iv. (1868) p. 233; and for figure and description, Entomologist, xi. p. 13.
[24] A.S. Packard, jun., Our Common Insects, p. 203 (Salem, U.S. 1873). On the Hessian fly, Cecidomyia destructor, Say, the May brood of which produces swellings immediately above the joints of barley attacked by it, see Asa Fitch, The Hessian Fly (Albany, 1847), reprinted from Trans. New York State Agric. Soc. vol. vi.
[25] J. Winnertz, Beitrag zu einer Monographie der Sciarinen, p. 164 (Vienna, 1867).