Aphid notes 



by EVERARD E. BLANCHARD 



PART I 



ARGENTINE SPECIES OF THE SUBTRIBE MAGROSIPHINA (HOMOPTERA) 



The stucly of the aphid fauna of the Argentine has, up to the present, 

 been saclly neglected, due uo doubt to the many inconveniences encoun- 

 tered in the handling of this group of Homoptera, as well as to the 

 great difficult) in obtaining the fundamental works, so necessary to all 

 study of a taxonomic nature. 



During the last five years, I have been able to gather logether a good 

 many specimens, thanks to the hearty co-operation of my friend and eo- 

 league, Ing. agrónomo Carlos Lizer as well as Sr. Germán R. Huidobro 

 Juan M. Bosq and many others to whom I am greally indebted, and 

 I propose, from time to time, to publish the results of my studies un- 

 der the heading of Aphid notes. Any further contribulion of material 

 would be greatly appreciated. 



Only the descriptions of those species that have actualh come under 

 m\ observation, will be giren. Species previously recorded from this 

 counlry by other workers, that I have not as yet « rediscovercd », will 

 be treated only in the keys. 



The argentine genera of the sublribe Macrosiphina may be separated 

 by the following ke\ : 



i. ^.ntennal tubercles diverging. 2 



\11lcm1al tubercles converging; produced al inner apical angle. \ 



2. Cornicles distinctlj swollen. Amphorophora 



Comicles cylindrical or tapering. 3 



