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SMITHSONIAN    MISCELLANEOUS    COLLECTIONS  VOL.    96 
of  the  epiphallic  armature  into  the  genital  chamber  of  the  female; 
probably  the  median  recurved  hook  (fig.  32  B,  q)  holds  in  the  fold  of 
soft  tissue  on  the  floor  of  the  genital  chamber  posterior  to  the  gono- 
pore,  while  the  tip  of  the  rod  (G,  v)  carrying  the  spermatophore  duct 
is  inserted  into  the  spermathecal  opening,  situated  on  the  end  of  a  thick 
process  projecting  downward  and  backward  from  a  pouch  in  the 
dorsal  wall  of  the  genital  chamber  (see  Snodgrass,  1933,  figs.  18,  19). 
A  contraction  of  the  muscular  sheath  of  the  dorsal  sac  of  the  phallus 
Fig.  35. — Tettigonioidea-Gryllidae :  external  male  genitalia  and  spermato- 
phore of  Gryllodcs  sigillatus  (Walker). 
A,  adult,  end  of  abdomen,  dorsal  view.  B,  late  nymphal  instar  (full-grown), 
end  of  abdomen,  ventral  view.  C,  same,  phallus,  removed  from  genital  cham- 
ber, ventral  view.  D,  phallus  of  succeeding  instar  (probably  immature  adult) 
taken  from  within  cuticula  of  C.  E,  spermatophore,  dorsal  view.  F,  end  of 
guide  rod  (G,  I,  v)  for  spermatophore  duct.  G,  mature  phallus,  ventral  view. 
H,  same,  lateral  view,  showing  ectophallic  parts  to  right  of  genital  chamber 
wall  {x-x),  and  internal  parts  to  left.  I,  distal  part  of  dorsal  wall  of  dorsal 
pouch  of  phallus,  together  with  epiphallic  lobes  {e,  r,  s)  and  basal  ectophallic 
sclerites  (/>),  ventral  view.  .1,  epiphallus  and  dorsal  pouch  of  phallus,  lateral 
view. 
For  letter  explanation,  see  fig.  30. 
would  now  protract  the  spermatophore  duct  from  the  guiding  rod, 
and  also  force  out  the  attachment  plate  (fig.  32  G,  y),  which  latter, 
being  inserted  into  the  genital  chamber  of  the  female,  holds  the  duct 
in  place,  and  supports  the  ampulla,  which  hangs  from  the  neck  of  the 
plate  mostly  outside  the  genital  chamber.  After  copulation  the  female 
carries  the  spermatophore  a  varying  length  of  time,  but  eventually 
removes  it  with  her  jaws  or  by  rubbing  against  the  ground. 
Gryllodcs  sigillatus  (fig.  35)  presents  the  same  type  of  structure  in 
the  genital  parts  as  does  Gryllus,  though  there  are  distinctive  minor 
