334 



FRED. V. THEOBALD 



T. J. Anderson (Ann. Rept. Dept. Agric. Brit. E. Africa for 1911-12, p. 115) 

 says that this species was responsible for considerable damage to the wheat crop 

 at Njoro from June to November, 1911. He speaks of it as the Wheat Aphis 

 or Wheat Green Fly. 



Tuberculatus quercus, Kaltenbach. 



Aphis quercus, Kaltenbach. 



Aphis suberis, Tavares. 



Callipterus quercus, Koch, Buckton, etc. 



Myzocallis quercus, Passerini. 

 Kaltenbach, Mon. Pflanz. p. 98 (1843) ; Ratzeburg, Forst. Ins. iii, p. 217 

 (1844) ; Walker, Ann. Nat. Hist. (2) i, p. 337 (1*48) ; Koch, Die Pflanz. p. 218, 

 figs. 290, 291 (1857); Buckton, Mon. Brit. Aph. iii, p. 21, pi. xc (1880); 

 Theobald, Sec. Rept. Econ. Zool. Brit. Mus. (N.H.), p. 122 (1902) ; Lounsbury, 

 Leaflet no. 26, Dept. Agric. Cape Col. (1903). 



Fig. 15. — Fore wing of (A) Toxoptera theobromae, Schout., (B) Aphis tavares} Del Guercio, 



and (C) Dry aph is persicae, Choi. 



Cape Colony {Lounsbury). — Europe generally. 



Food- PLANTS : Quercus pedunculata, Q. sessiliflora, Q. ilex, C cutanea pumila. 

 Widespread and abundant at the Cape and considered by Lounsbury to be a 

 chance introduction from Europe. 



Dryaphis persicae, Cholodkovsky. (Figs. 15, 16.) 



Lachnus persicae, Cholodkovsky. 

 Cholodkovsky, Zool. Anz. p. 472 (1899). 



