NO.    5      MALE  GENITALIA  OF  ORTHOPTEROID  INSECTS — SNODGRASS        6l 
lateral  ducts  turning  downward  and  mesally  between  the  principal 
nerves  of  the  seventh  and  eighth  segments  (B).  Compared  with  the 
male,  in  which  the  vasa  def  erentia  turn  downward  between  the  nerves 
of  the  tenth  and  eleventh  segments,  it  is  seen  that  the  nerves  of  three 
segments  intervene  between  the  positions  of  the  ends  of  the  ducts  in 
the  two  sexes,  from  which  it  is  evident  that  two  segments  intervened 
between  the  primary  female  genital  segment  (VII)  and  the  primary 
male  genital  segment  (X). 
B  8- 
Fig.  21. — Tettigonioidea :    male  genitalia  of  Cyphoderris  monstrosa  Uhler. 
A,  adult  male,  end  of  abdomen,  lateral  view.  B,  phallus  of  adult,  posterior 
view.  C,  ninth  abdominal  sternum,  ventral  view.  D,  male  nymph,  probably  full 
grown,  end  of  abdomen,  dorsal  view.  E,  same,  internal  reproductive  organs. 
F,  same,  end  of  abdomen,  ventral  view.  G,  H,  I,  same,  phallus,  dorsal,  posterior 
and  ventral  views. 
AcGId,  first  rudiment  of  accessory  glands;  Amp,  mesodermal  ampulla;  dc, 
dorsal  cavity  of  phallus;  Dcj,  ejaculatory  duct;  dl,  dorsal  lobe  of  phallus;  Enph, 
endophallus ;  g,  posterior  margin  of  dorsal  lobe  of  phallus ;  //,  lateral  lobe  of 
phallus ;  Phtr,  phallotreme ;  sp,  sternal  process ;  Sty,  stylus ;  Tes,  testis ;  vl, 
ventral  lobe  of  phallus ;  Vd,  vas  deferens. 
Cyphoderris  monstrosa. — This  insect,  of  uncertain  taxonomic  status, 
would  appear  to  belong  to  the  Tettigoniidae  because  of  the  presence 
of  well-developed  styli  on  the  ninth  abdominal  sternum  of  the  male 
in  both  adult  and  nymphal  stages  (fig.  21  A,  F,  Sty),  and  because 
of  the  more  complete  separation  of  the  epiproct  from  the  tenth  tergum 
(A,  D)  than  is  characteristic  of  the  Gryllidae.  The  phallus,  moreover, 
very  well  represents  a  generalized  condition  of  the  tettigoniid  type  of 
phallic  structure,  and  certainly  does  not  have  the  special  features 
of  the  organ  develo^jed  in  Gryllidae  and  related  families.   The  ninth 
