2o¿ PI1YSIS (V, 1922) 



I» 3'"> 3-" 



(Femora... 0.54 O.. 54 0.66 



Legs s Tibiae .. . o. 76 o. 83 1. 10 



v Tarsi. .... 0.12 o. 12 o.i3 



Rostrum. 0.57 



1 late virgogene. 



Color : Head and thorax brownish black. Abdomen dark bro- 

 vraish, al limes with a dusky greenish hue with the usual lateral 

 black spots. Evos dark brown. Antennae blackish with base oí III 

 paler. Legs brownish, with coxae, trochanters, distal 1/2 oí' femó- 

 la, liases and apical i/3 of tibiae and tarsi, blackish. Canda, cor- 

 nicles, anal and genital piales as in apterous virgogene. Rostrum 

 blackish brown. 



Morphological charactérs : Mead and thorax covered with ratber 

 short fine bairs. Abdomen with dorsum and venter as in apterous 

 virgogene. Antennal imbrications as in apterous form. III provided 

 with hairs subequal in length to its greatest breadth and. with about 

 3o irregular large subcircular sensoria scattered over its entire 

 length. I\ with about 7 sensoria placed in more or less a single 

 row. Rostrum, cauda and comióles as apterous virgogene. 



Relative measurements : 



1 



Length 1 . 



Width 0.8 



f. t. I II III IV V VI f. 



Antennae 0.08 o.i3 0.08 0.66 0.36 o. 35 o.i3 o. (3a 



Cauda. o. 3o 



Cornicles 0.27 



jsi 2 nd 3 .d 



SFemora. . . 0.57 0.06 0.66 



Tibiae ... 0.87 0.88 1.17 



Tarsi. .... 0.12 0.12 0.12 



Rostrum. 0.57 



Ilab This is the species that is found quite commonly 011 cultivated 

 chrysanthemums. I have taken specimens in San Isidro, Belgrano, Flo- 

 res, Lomas de Zamora, Buenos Aires. Macrosiphoniella sanborni (Gil- 

 1.1:11.), cuines ver\ cióse lo ibis species and may prove lo be the same, in 

 which case chrysanthemi, DelGuercio would become a syndnymof the 



atore nienl inned species. 



