TRANSACTIONS 



OF THE 



AMKRICAN ENTOMOLOGICAL SOCIETV 



VOIvUIVEE XXIII, 



THE TAXOXOmC VAI.I'E OF THE ANTEHTX/E OF 

 THE L,EI*Il>OI>TEKA. 



A THESIS PRESEXTED TO THE FACULTY OF CORNELL UNIVERSITY 

 MAY 1, 1895, FOR THE DEGREE OF DOCTOR OF SCIEXCE. 



BY DONALDSON BODINE. 



TABLE OF CONTENTS. 



INTRODUCTION.— Classification, methods uf study, material, methods, normal 

 position. 



MORPHOLOGY.— Position, parts, insertion. 



HI8TOLO(tY. — Ooneral structure, covering, protective hairs, scales, sense-organs, 

 sense-hairs — three types, pits and rods, cones, "Johnston's organ." 



FUNCTION.— Touch, taste, smell, hearing. 



EVOLUTION OF ANTENN.E. -Primitive form, scape, pedicel, clavola, spe- 

 cialization, ventral exjiansion, pectination, differentiation of sen.se-haii"s_ 

 chitinous surface, fixed-hairs, plates. 



DISCUSSION OF FAMILIES.— Jugatie, Frenatte. Generalized Freuat^e, Spe- 

 cialized Macrofrenatse, Frenulum-conservci"s, Frenulura-losers. 



SUMMARY. 



CONCLUSION. 



DESCRIPTION OF FIGURES. 



INTRODUCTION. 



The avowed aim of all modern classification in biological science 

 is to gronp together those forms of life which have a close genetic 

 ivlationship, and to show how they are related. 



Thoiigli not always evident at first, there can be no donbt that 

 community of descent atibrds the surest guide to similarity in the 



TRANS. AM. ENT. SOC. XXIII. (1) JAXUAR\% 1896. 



