THE  MALE  GENITALIA  OF  ORTHOPTEROID  INSECTS 
By  R.  E.  SNODGRASS 
Bureau  of  Entunwloyy  and  Plant  Quarantine,  U.  S.  Department  of  Agriculture 
CONTENTS 
PA  OF. 
I.    Introduction     i 
Development  of  the  male  gonads 2 
The  male  genital  ducts 6 
The  external  genitalia 9 
II.    Isoptera     12 
III.  Embioptera    14 
IV.  Zoraptera    17 
V.    Grylloblattoidea    19 
VI.    Phasmatoidea    23 
The  testes   23 
The  accessory  genital  glands 25 
The  external  genitalia  and  associated  structures 25 
VII.    Mantoidea    29 
The  interna!  genitalia 30 
The  external  genitalia 31 
Mating  habits  and  spermatophores 35 
VIII.    Blattoidea     36 
The  testes  37 
The  genital  ducts 37 
The  accessory  genital  glands 3~ 
The  seminal  vesicles 40 
The  phallic  gland 41 
The  phallic  organs 41 
The  female  genitalia 52 
Copulation  and  insemination 55 
IX.    Tettigonioidea   58 
Cyphoderris  monstrosa   61 
Tettigoniidae    62 
Rhaphidophorinae    74 
Stenopelmatus    fuscus    jj 
Gryllidae    79 
Gryllotalpidae     92 
X.    Acridoidea   96 
References    loi 
Species  index    107 
I.   INTRODUCTION 
The  order   Orthoptera  as   here  understood   inckides  at   least  the 
Mantoidea,  Blattoidea,  Tettigonioidea,  and  Acridoidea.    The  grotip 
Smithsonian  Miscellaneous  Collections,  Vol.  96,  No.  5 
