108 Psyche [June 



Geegory, L. H. 



1917 The effect of starvation on the wing development of 

 Microsiphiun destructor. Biol. Bull. 33 : 396-303. 

 Hekrick, G. W. 



1911. The cabl)age Aphis (Aphis hrassica'). Jonrn. Ec-on. En- 

 tomology 4: 319-224:. 



HeETWIG, E., and J. S. KiNGSLEY 



1912 A Manual of Zoology. xii-[-60G pp. 621 fig. Henry 

 Holt and Company, Xew York. 

 Kybee, J. F. 



1815. Einige Erfahriingen und Bemei-kungen ul)er Blattliiuse. 

 Germar's Magazin der Entomologie 1 : 1-39. 

 Maxwell-Lefeoy, H. 



1907. The more important insects injurious to Indian agricul- 

 ture. Memoirs of the Department of Agriculture in India, 

 entomological series, 1 : 113-253. 

 MOOEE, W. 



1912. The green peach Aphis (Myzus perslcce) and its control. 

 Agricultural Journal of the Union of South Africa 4: 

 419-428. 



Paddock, F. B. 



1915. The turiiip louse. Texas Agric. Exp. Sta. Bull. No. 

 180. 77 pp. 



Patch, E. M. 



1920. The life cycle of aphids and coccids. Ann. Entom. Soc. 

 America 13: 156-167. 

 Phillips, W. J. 



1916. Macrosiphum //rona/tM///, the English grain Aphis. Jouru. 

 Agric. Eesearch 7 : 463-480. 3 pi. 1 fig. 



EUSSELL, H. H. 



1914. The rose Aphis. U. S. Department of Agriculture Bull. 

 ]^o. 90. 15 pp. 3 pi. 4 fig. 



SlEBOLD, C. T. VON 



1839. Tiber die inneren Geschlechtswerkzeuge der viviparen und 

 oviparen Blattlause. Froriep's neue Notizen 12: 305- 

 308. 



