PLATE I. 



A. — Anoecia querci, apterous form. 

 B. — Anoecia querci, wings. 

 C. — Anoecia querci, antenna of alate form. 

 D. — Anoecia corni, fore wing. 

 E. — Anoecia corni, antenna of alate form. 

 F. — Anoecia corni, cornicle of alate form. 

 G. — Nippolachnus pyri, fore wing. 

 H. — Nippolachnus pyri, head of alate form. 

 I. — Anoecia corni, head of alate form. 

 J. — Nippolachnus pyri, cornicle of alate form. 

 K. — Nippolachnus pyri, antenna of alate form. 

 L. — Eulachnus agilis, body of alate form. 

 M. — Eulachnus agilis, fore wing. 

 N. — Eulachnus agilis, antenna of alate form. 

 O. — Eulachnus agilis, cornicle of alate form. 

 P. — Eulachnus rileyi, head of alate form. 

 Q. — Eulachnus rileyi, cornicle of alate form. 

 R. — Eulachnus rileyi, segment III, antenna of alate form. 

 S. — Essigella californica, body of alate form. 

 T. — Essigella calif ornica, fore wing. 

 U .—Essigella calif ornica, antenna of alate form. 

 V. — Essigella californica, cornicle of alate form. 

 W. — Essigella californica, head of alate form. 

 X. — Essigella californica, cauda of alate form. 

 . Y. — Essigella californica, antenna of apterous form 

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