PLATE X. 



A. — Gobaishia pallida, antenna of alate form. 



B. — Gobaishia pallida, antenna of stem mother. 



C. — Gobaishia pallida, 'wings. 



B. — Gobaishia pallida, abdomen of alate form showing cornicle. 



E. — Gobaishia pallida, fore wing. 



F. — Gobaishia pallida, abdomen of pupa. 



G. — Gobaishia pallida, distal segment of antenna of alate form from above, 



H. — Tetraneura ulmifoliae, antenna of alate form. 



I. — Tetraneura ulmifoliae, antenna of stem mother. 



J. — Tetraneura ulmifoliae, antenna of apterous form. 



K.— Tetraneura ulmifoliae, wings. 



L. — Tetraneura ulmifoliae, wings showing tracheae. 



M. — Tetraneura ulmifoliae, cauda and anal plate. 



N. — Cornaphis populi, stem mother. 



0. — Cornaphis populi, antenna of stem mother. 



P. — Cornaphis populi, wings. 



Q. — Cornaphis populi, cornicle of alate form. 



Pv. — Cornaphis populi, antenna of alate form. 



S. — Cornaphis populi, fore wing. 



T. — Cornaphis populi, head showing horn. 



U. — Dryopeia bella, apterous form, 



V. — Dryopeia bella, wings. 



W. — Dryopeia bella, antenna of apterous form. 



X. — Dryopeia bella, antenna of alate form. 



Y. — Dryopeia bella, cornicle of apterous form. 



