PLATE XI. 



A.— Mordwilkoja vagabunda, stem mother. 

 B. — -Mordwilkoja vagabunda, antenna of stem mother. 

 C. — Mordwilkoja vagabunda, antenna of alate form. 

 D .—Mordwilkoja vagabunda, ■wings. 

 ~E.—Mordvnlkoja vagabunda, thorax of alate form. 

 F.— Mordwilkoja vagabunda, cauda of alate form. 

 G. — Mordivilkoja vagabunda, cornicle of alate form. 

 H.— Asiphurn sp. stem mother. 

 I. — Asiphurn sp. antenna of stem mother. 

 J. — P achy pap pella vesicalis, wings. 



K. — Pachypappella vesicalis, cornicles and cauda of alate form. 

 L. — Pachypappella vesicalis, antenna of alate form. 

 M. — Pachypappella vesicalis, wax plate. 

 N. — Pemphigus bursarius, antenna of stem mother. 

 .—Pemphigus bursarius, wings. 

 P.— Pemphigus bursarius, antenna of alate form. 

 Q. — Pemphigus bursarius, antenna of alate form. 

 R. — Pemphigus bursarius, antenna of stem mother. 

 S. — Pemphigus bursarius, wax plate. 

 T. — Pemphigus bursarius, cornicle of alate form. 

 U. — Pemphigus populicaulis, antenna of stem mother. 

 V. — Gobaishia ulmifuscus, antenna of stem mother. 

 W. — Phloeomyzus passerini, apterous form. 

 X. — Phloeomyzus passerini, antenna of apterous form. 

 Y. — Phloeomyzus passerini, wings. 

 Z. — Phloeomyzus passerini, antenna of apterous form. 

 AA. — Phloeomyzus passerini, antenna of alate form. 

 BB. — Phloeomyzus passerini, wax plate. 

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