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SMITHSONIAN    MISCELLANEOUS    COLLECTIONS  VOL.    96 
the  vas  deferens  takes  a  straight  course  to  the  ninth  abdominal  seg- 
ment, where  it  loops  beneath  the  large  cereal  nerve  (A,  XINv),  and 
then  turns  forward  to  enter  the  mass  of  accessory  gland  tubules.  Here 
it  becomes  much  thickened  and  forms  a  compactly  coiled  epididymis 
(C,  Epdni),  beyond  which  it  again  tapers  to  a  narrow  tube  and  opens 
ventrally  into  the  ejaculatory  duct  near  the  bilobed  anterior  end  of  the 
latter. 
^Con 
Fig.  34. — Tettigonioidea-Gryllidae :  internal  male  genitalia  of  Gryllus  as- 
similis  Fabricius. 
A,  general  view  of  internal  reproductive  organs,  dorsal  view.  B,  anterior 
intratesticular  part  of  vas  deferens  and  group  of  sperm  tubes.  C,  posterior 
loop  of  vas  deferens  beneath  nerve  to  cercus,  right  side,  dorsal  view.  D,  dorsal 
pouch  of  phallus  (k)  invaginated  into  body  cavity,  the  phallic  muscles,  and 
associated  last  ganglion  of  ventral  nerve  cord,  dorsal  view. 
For  letter  explanation,  see  fig.  30 ;  for  muscles,  see  text,  page  81. 
The  accessory  glands  consist  of  a  mass  of  slender  tubules  arising 
from  the  bilobed  anterior  end  of  the  ejaculatory  duct  (fig.  34  A, 
AcGlds).  The  dorsal  tubules  are  somewhat  smaller  than  the  lateral 
and  more  ventral  tubules.  The  smaller  tubules,  according  to  Spann 
(1934),  have  a  glassy  appearance  because  of  their  clear  granular 
secretion,  which  takes  a  nuclear  stain,  while  the  larger  tubules  have 
a  milky-white  secretion,  which  coagulates  readily  on  exposure  to  air, 
and  takes  a  cytoplasmic  stain.  The  parts  played  by  the  products  of 
the  two  sets  of  glands  in  the  formation  of  the  spermatophore  will  be 
