NO.    5      MALE  GENITALIA  OF  ORTHOPTEROID  INSECTS SNODGRASS        43 
Fig.  13. — Blattoidca :    external  male  genitalia  of  Blatta  oricntaUs  Linnaeus. 
A,  genitalia  in  place  within  genital  chamber  distal  to  anterior  wall  of  latter 
(x-.v),  and  parts  invaginated  into  body  cavity,  dorsal  view.  B,  right  phallomere, 
dorsal  view.  C,  same,  posterior  view  with  distal  lobes  turned  dorsally.  D,  left 
phallomere,  dorsolateral  view.   E,  same,  ventromesal  view. 
Parts  of  Right  Phallomere. — a,  h,  c,  left,  median,  and  right  lobules  of  free 
dorsal  lobe ;  d,  sinistral  prongs ;  ,?,  dextral  hook ;  /,  dorsal  plate  of  dorsal  lobe ; 
//,  articulation  of  dorsal  plate  with  apodemal  plate  (0)  ;  h,  ventral  plate  of 
dorsal  lobe ;  i,  left  arm  of  ventral  plate ;  /,  distal  arm  of  ventral  plate ;  k,  right 
lobe  of  ventral  plate ;  /,  articulation  of  ventral  plate  with  capsular  sclerite ;  m, 
capsular  sclerite ;  n,  ventral  valvular  plate ;  0,  basal  plate  of  apodeme ;  p,  apo- 
deme;  y,  pouch  of  genital  chamber  wall  (.r-.r)  containing  base  and  apodeme 
of  right  phallomere. 
Parts  of  Left  Phallomere. — q,  q ,  r,  s,  t,  u,  distal  subdivisions  and  free  proc- 
esses ;  V,  ventral  sclerite ;  ::,  pouch  of  genital  chamber  wall  containing  base  of  left 
phallomere. 
Other  lettering  as  on  preceding  figures.  For  explanation  of  muscles,  see  fig.  14. 
