6o 
SMITHSONIAN    MISCELLANEOUS    COLLECTIONS 
VOL. 
96 
external  genital  opening,  or  vulva  (female  gonotreme),  lies  between 
the  base  of  the  ovipositor  and  the  posterior  margin  of  the  eighth 
sternum,  or  a  differentiated  subgenital  lobe  of  the  latter  (fig.  20  B,  F, 
Vid) .  It  leads  into  a  small  genital  chamber  into  which  open  both  the 
median  oviduct  and  the  spermatheca.  The  opening  of  the  oviduct 
(female  gonopore)  lies  ventrally,  either  in  the  anterior  wall  of  the 
^VNC 
Tes 
Epdm;' 
XNv-._ 
XINv 
Cer- 
Fig.  20. — Tettigonioidea — Tettigoniidae :  male  and  female  genitalia  of  Pha- 
neroptera  fitrcata   (Brunner). 
A,  internal  reproductive  organs  of  adult  male,  ventral  view.  B,  end  of  abdo- 
men of  female,  ventral  view.  C,  opening  of  oviduct  (Gpr)  on  fold  of  upper 
surface  of  eighth  abdominal  sternum.  D,  spermatheca.  E,  spermathecal  aper- 
ture at  base  of  ovipositor  in  dorsal  wall  of  genital  chamber.  F,  end  of  female 
abdomen,  lateral  view. 
a,  b,  c,  d,  four  paired  groups  of  accessory  gland  tubules ;  Cer,  cercus ;  Dej, 
ductus  ejaculatorius ;  ejv,  vesicle  of  ejaculatory  duct;  Epdni.  epididymis;  Gpr, 
gonopore ;  Ode,  oviductus  communis ;  Spr,  spermathecal  aperture ;  Tes,  testis ; 
iVI,  3VI,  first  and  third  valvulae  of  ovipositor;  VNC,  ventral  nerve  cord; 
Vul,  vulva  (female  gonotreme)  ;  x-x,  cut  edge  of  anterior  wall  of  genital  cham- 
ber; XNv,  XINv,  nerves  of  tenth  and  eleventh  abdominal  segments. 
genital  chamber,  or  on  a  median  fold  of  the  floor  (fig.  20  C,  Gpr). 
The  spermathecal  aperture  is  in  the  dorsal  wall  of  the  chamber  (E, 
Spr)  ;  it  may  be  concealed  in  a  pocket  of  the  latter,  or,  as  in  Gryllus, 
it  may  be  situated  on  a  large  spoutlike  projection.  The  spermatheca  is 
a  single  oval  or  elongate  sac  (figs.  20  D,  29  B),  and  its  duct  has  no 
diverticulum.  The  short  median  oviduct  (fig.  40  A,  Ode)  unites  with 
the  lateral  oviducts  (Odl)  in  the  ventral  part  of  the  abdomen,  the 
