NO. 3585 MICROLEPIDOPTERA, XII — DUCKWORTH 3 



tions posed by this genus are answ ered. It is hoped that the recording 

 of the first host plant association will provide a starting point for 

 additional activity in this area. 



The author wishes to acknowledge with thanks the cooperation and 

 aid of the follo\\ing individuals and institutions who, through their 

 support and encouragement, have materially aided the present study: 

 Dr. F. Fernandez Yepez, Falcultad de Agronomia, Universidad 

 Central de Venezuela; Dr. Robert L. Dressier, Smithsonian Tropical 

 Research Institute, Canal Zone, Panama; Mr. Karel A. Hallebeek, 

 Dr. Leonce Bonnefil, Dr. J. K. Knoke, Instituto Interamericano de 

 Ciencias Agricolas de la O.E.A., Turrialba, Costa Rica, for support 

 and assistance in various field studies; Dr. J. J. Hanneman, Institut 

 fiir Spezielle Zoologie und Zoologisches Museum der Humbolt-Uni- 

 versitat zu Berlin; Dr. Fritz Kasy, Naturhistorisches Museum, Vienna; 

 Mr. P. E. S. Whalley, Mr. Alan Watson, British Museum (Natural 

 History); Dr. J. G. Franclemont, Cornell University; Dr. Klaus 

 Sattler, Zoologische Sammlung des Bayerischen Staates, Munich, for 

 lending types and other specimens in their charge for study. 



The author also wishes to thank Mrs. Sandra Duckworth for 

 assistance in all phases of the study, Mr. Andre Pizzini for the genitalic 

 drawings and distribution maps, and Mr. Jack Scott for the photo- 

 graphic work. 



This study was aided in part by the National Science Foundation 

 on Grant GB-1800. 



Genus Lethata Duckworth 



Leihata Duckworth, 1964, Proc. U.S. Nat. Mus., vol. 116, p. 98. 



Type-species: Stenoma trochalosticta Walsingham, by original 

 designation. 



The additional information contained herein has not materially 

 affected the original concept of the genus and the original description 

 requires only the following emendation. 



Female genitaha: Ovipositor lobes hghtly or heavily sclerotized; 

 intersegmental membrane between ovipositor lobes and eight segment 

 sclerotized or membranous; ostiiun bursae sclerotized or membranous; 

 ductus bursae sclerotized or membranous; corpus bursae membranous, 

 with two dentate signa connected by narrow, weakly sclerotized band. 



Key to Species of Lethata Based on Genitalia 



1. Male 2 



Female 29 



2. Anellar lobes symmetrical 3 



Anellar lobes asymmetrical 27 



