NO.    5      MALE  GENITALIA  OF  ORTHOPTEROID  INSECTS — SNODGRASS        79 
globular  ampullae  (E,  Amp),  each  of  which  is  produced  into  a  single 
diverticulum  (AcGld),  evidently  a  rudiment  of  the  definitive  accessory 
gland  tubules. 
K'l-  XT 
Fig.  32. — Tettigonioidea-GrylHdae :  external  male  genitalia  of  Gryllus 
assimilis  Fabricius. 
A,  end  of  abdomen,  lateral  view.  B,  phallus,  lateral  view,  showing  ectophallus 
to  right  of  anterior  wall  of  genital  chamber  (x-x),  and  internal  parts  to  left. 
C.  phallus,  ventral  view.  D,  distal  part  of  dorsal  wall  of  dorsal  cavity  of  phallus 
(C,  dc),  ventral  view.  E,  semidiagrammatic  median  section  of  phallus  and 
ninth  abdominal  sternum.    F,  spermatophore.    G,  spermatophore  in  phallus. 
For  letter  explanation,  see  fig.  30. 
Gryllidac. — Characteristic  of  this  family,  in  the  terminal  structure 
of  the  abdomen,  is  the  union  of  the  epiproct  with  the  tenth  tergum 
(figs.  32  A,  35  A,  36  A).    The  phallus  attains  a  highly  specialized 
form,  which  is  an  extreme  modification  of   the  tettigoniid  type  of 
6 
