210 BRITISH APniDES. 



Hist, ser. 2, vol. i, p. 372. 1848. Aphides and 

 their Food Plants, Zoologist, vol. iv, p. 1288. 

 1846. See also Zoologist, vol. iv, pp. 1359, 1461 ; 

 vol. vi, pp. 2217, 2246, 1848; vol. vii, pp. xxxi, 

 xliii, 1849 ; p. cii, 1850. Catalogue of Homop- 

 tera, British Museum, part iv, 1852 ; and Supple- 

 ment. 1858. 



Westwood, J. 0. Introduction to Modern Class, of 

 Insects, Aphidoe, vol. ii, p. 437. 1840. Habits 

 of Insect Parasitic on Eose Louse, Mag. Nat. 

 Hist., vol. vi, p. 491. 1833. Introductory 

 Observations on Fossil Insects in Brodie's Fossil 

 Insects. 1845. 



Witlaczil, F. Zur Anatomie der Aphiden, Arbeit. Zool. 

 Instit, Wien, b. iv, p. 397. 1882. Also Abstract, 

 Journ. B. Micro. Soc, ser. 2, vol. iii, pt. 1, pp. 49 

 —51. 1883. 



Zetteestedt, J. W. Insecta Lapponica, vol. i, p. 306. 

 1840. 



The above is not an exhaustive list of the writers on 

 Aphides, but it is believed that all the chief known 

 facts, as connected with their economy, can be extracted 

 from the memoirs above named. 



