1 88 PHYSIS (V, 1922) 



tarsi, ápices and basa] exl remities of tibiae and apicíes of femora, blac- 

 kish. Cornicles blackish. Cauda greenish yellow. \nal and genital 

 piales as well as apical segments of beak and front darkened. There 

 ¡s sometimes a darkened arca contiguous witb thebase of each cor- 

 nicle. 



Morphological characters : Oval elongated, somewhaf convex. 

 Dorsum provided with transverse series of piliferous tubercles while 

 the venter is provided with double series ofthe same. Prothorax 

 aiul generally segments II, 111 and 1\ of abdomen provided with 



Fig. 2. — Macrosiphum rosae (L ). Apterous virgogene : a, antenna; b: seg- 

 inent III of antenna; c, eornicle ; d, tip of corniele; e, cauda. Álate vir- 

 gogene : f, cauda; g, antenna; h, segment III of antenna; i, corniele ; 

 j, tip of corniele. 



small lateral tubercles which are at times difficult to discern. Seg- 

 ment III of antennae with hairs subequal lo its greatest diameterand 

 with from i5 to 20 small sensoria scattered overthebasal halfof its 

 length. Beak reaches second coxae, Cornicles long and slender, 

 cylindrical, distinctly' compressed at apical 1/8 where the tegument 

 is provided with polygonal imbrications ; apex distinctly dilated. 

 Cauda long, ensiform with al least íive pairs of lateral bristles. Im- 

 brication of tarsi very faint lo obsolete. \nlennal imbrication visi- 

 ble 011 VI and filament, ^cv\ faint on 11 and III, and lacking on 

 the remaining segments. 



Relative rrieasurements : 



Lenglh 3.3o 



Widlh 1 .5o 



