CONTENTS 



Page. 



Introductory I 



Historical .> 



( )riginal description of genus 4 



Translation 4 



Synonymy 



Revisional notes 



1 description of genus 5 



Anatomical 5 



Nomenclature 



Illustrations... Q 



---------"------....... r7 



External characters of the imago 9 



The head 11 



The thorax 22 



Divisions of the thoracic segment 23 



Elements of the adult thorax 26 



The prothorax 26 



The mesothorax 28 



Mesotergum 28 



Mesoplura fc . . 29 



Mesosterna 30 



The metathorax 30 



Metatergum 30 



Metapleura 34 



Metasterna 35 



The abdomen 35 



Abdominal tergites 36 



Abdominal pleurites 33 



Abdominal sternites 33 



Spiracles 39 



The legs 39 



The wings ^ 



Mcsothoracic and metathoracic wings 42 



Metathoracic or hind wings .j;j 



Mesothoraric wings or elytra 49 



I nt ernal anatomy 5^ 



1 i,u r osf ive system 52 



Hilary sexual characters - )L > 



Pu Pa '.^ 53 



Larva 5^ 



External characters 57 



Digestive system 6 4 



.......'.'..'.'. 64 



Shyriological characteristics 



554065 



IS. 



