NO.    5      INIALE  GENITALIA  OF  ORTHOPTEROID  INSECTS — SNODGRASS        23 
VI.    PHASMATOIDEA 
The  general  structure  of  tlic  reproductive  organs  of  the  Phas- 
matidae  shows  that  the  phasmatids  are  to  be  classed  among  the  more 
generalized  groups  of  orthopteroid  insects.  The  external  genitalia 
of  the  male  consist  either  of  irregular  lobes  surrounding  the  gonopore, 
or  of  a  single  phallic  structure  containing  the  genital  opening,  and 
thus  resemble  the  nymphal  organs  of  either  Blattidae  or  Tettigoniidae. 
The  female  is  provided  with  a  small  ovipositor,  which  differs  but 
little  from  the  ovipositor  of  Mantidae  and  Blattidae.  Few  studies 
have  been  made  on  the  internal  reproductive  organs  of  the  phasmatids, 
but  the  several  examples  here  given  show  that  the  testes  may  have  a 
generalized  compound  structure,  though  usually  they  are  simple  tubes 
without  external  subdivisions,  and  that  the  accessory  glands  consist 
of  a  group  of  tubules,  though  the  latter  are  never  so  numerous  as  in 
Mantidae  and  Blattidae,  or  in  the  saltatorial  Orthoptera. 
The  testes. — A  generalized  type  of  testicular  structure  occurs  at 
least  in  Timema  calif ornica,  in  which  each  testis  (fig.  7  B,  Tes)  con- 
sists of  two  long  rows  of  small  but  distinct  globular  bodies  opening 
serially  into  the  anterior  part  of  the  vas  deferens.  Siebold  and 
Stannius  (1854)  included  the  Phasmatidae  among  Orthoptera  hav- 
ing a  multitude  of  round  testicular  follicles,  but  they  mentioned  no 
particular  species,  and  Suckow  (1828),  cited  as  authority  in  a  foot- 
note reference  of  the  English  translation,  gives  no  examples  of 
phasmatid  genital  organs.  De  Sinety  (1901),  finding  the  testes  to  be 
simple  continuous  tubes  in  species  studied  by  him,  as  in  Bacillus 
rossii  described  by  Heymons  (1897),  dismissed  the  earlier  idea  of  a 
compound  structure  in  the  phasmatid  testis  as  one  of  the  "  legendes 
traditionnelles "  of  entomology.  However,  if  Timeina  is  truly  a 
phasmatid,  there  would  appear  to  be  in  this  case  some  basis  for  the 
legend. 
With  most  of  the  Phasmatidae  in  which  the  internal  reproductive 
organs  have  been  examined,  the  testes  are  found  to  have  the  form 
of  long  tubes  showing  no  subdivision  into  sperm  tubules,  or  "  follicles." 
Heymons  (1897)  described  the  testes  of  an  immature  male  of  Bacil- 
lus rossii  as  two  long  strands  of  genital  and  epithelial  cells  continuous 
posteriorly  with  the  outlet  ducts.  Adult  organs  of  the  tul)ular  form 
are  described  by  De  Sinety  (1901),  particularly  in  Lcptytiiella  at- 
tenuata  (fig.  7  A,  Tes),  and  by  Pehani  (1925)  in  Carausiiis  inorosus. 
The  testes  of  Anisomorpha  huprcsloides  are  of  the  same  type,  as 
are  probably  also  those  of  Diaphcroniera  femorata  in  an  active  con- 
dition, but  the  specimens  of  this  species  examined  by  the  writer  had 
