Everard E. Blanciiard : Aphid notes 20 1 



Hab. Buenos Vires, San Isidro, Flores, province oí Buenos Aires; on 

 cultivated roses. Type material in my collection. 



Obs. Closely related to Aulacorthum rosaefolium Theobald, from 

 which it may be distingushed by ihe rounded apex oí" cauda, absence 

 of apical pair of lateral bristles in the apterous virgogene and by the an- 

 lennal ornamentation. The type species were found by the writer in 

 Buenos Aires. Sr. Jua> t M. Bosq presented me with specimens which he 

 lound 011 Begonia sp. which I am inclined to believe is another case of 

 transitorv invasión. 



PART II 



ARGEVTIXE SPECIES OF THE SLBTRIBE MACROSIPHIVA (concluded) 



Gemís MACROSIPHONIELLA Del Guekcio 



The species dealt with may be separated as follow 



Sensoria on III of apterous virgogene coníined 



to basal 1/2. 

 M. tanacetaria (Kalt .) var. bonariensis Blnchd. 

 Sensoria on III of apterous virgogene not coníi- 

 ned to basal half 2 

 Cauda distinctly longer than cornicles, recticu- 

 lated área subequal to 2/3 their length 



M. chrysanlhemi Del Guercio. 

 Cauda slightly shorter than cornicles, recticu- 

 lated área subequal toi/4 their length 



M. herética Blxchd. 



Macrosiphoniella herética n. sp. (fig. 8) 



Apterous virgogene. 



Color : Greenish to yelloAvish green. Eyes 



Fig. -8. — Macrosiphoniella be- 

 retica, Blaschard. Apterous 

 virgogene : a, antenna ; b, 

 segment III of antenna ; c , 

 cornícle ; d, tip of cornicle ; 

 e, cauda. 



brownish. Antennae dusky except segments I 

 and II which are concolorous with the body. 

 Legs, cauda, anal and genital plates, conco- 

 lorous with body. Cornicles, apical segments of rostrum, and 

 tarsi, dusky. 



