﻿304 
  Mr, 
  R. 
  E. 
  Turner 
  on 
  Fossorial 
  IJymenoptera. 
  

  

  differing 
  slightly 
  in 
  colour, 
  though 
  not 
  always 
  very 
  constant 
  : 
  

  

  (1) 
  E. 
  ruficeps, 
  Sm., 
  the 
  typical 
  form, 
  is 
  from 
  Natal 
  ; 
  

  

  (2) 
  E. 
  ruficeps 
  diapherogamia, 
  Sauss., 
  from 
  the 
  south 
  of 
  the 
  

   Transvaal 
  ; 
  (3) 
  E. 
  ruficeps 
  atopogamia, 
  Sauss., 
  from 
  Lake 
  

   Nyasa. 
  Other 
  forms 
  which 
  are 
  nearly 
  related 
  and 
  will 
  pro- 
  

   bably 
  prove 
  to 
  be 
  subspecies 
  are 
  E. 
  adeloyamia, 
  Turn., 
  from 
  

   Basutoland 
  ; 
  E. 
  heterogamia, 
  Sauss., 
  which 
  ranges 
  from 
  

   Delagoa 
  Bay 
  to 
  Mlangi 
  in 
  South 
  Nyasaland 
  ; 
  and 
  E. 
  hova, 
  

   Turn, 
  {nodosa, 
  GueV., 
  ? 
  ?), 
  from 
  Madagascar. 
  If 
  the 
  latter 
  

   is 
  included, 
  nodosa 
  will 
  have 
  to 
  be 
  used 
  as 
  the 
  specific 
  name. 
  

  

  1 
  am 
  able 
  to 
  associate 
  males 
  with 
  the 
  three 
  subspecies 
  given, 
  

   though 
  only 
  on 
  circumstantial 
  evidence. 
  

  

  The 
  following 
  key 
  will 
  serve 
  to 
  distinguish 
  the 
  nearly 
  allied 
  

   forms 
  in 
  both 
  sexes 
  : 
  — 
  

  

  2 
  $. 
  A. 
  Wings 
  hyaline, 
  slightly 
  tinted 
  with 
  

  

  fuscous. 
  Legs 
  black 
  E, 
  heterogamia, 
  Sauss. 
  

  

  B. 
  Wings 
  fuscous, 
  more 
  or 
  less 
  glossed 
  

   with 
  blue 
  or 
  purple. 
  

  

  a. 
  Legs 
  black. 
  

  

  a 
  2 
  . 
  Front 
  and 
  scape 
  black 
  E. 
  addogamia, 
  Turn. 
  

  

  b 
  2 
  . 
  Front 
  and 
  scape 
  red 
  E. 
  hova, 
  Turn. 
  

  

  b. 
  Legs 
  red. 
  

  

  a 
  2 
  . 
  Pronotum 
  black, 
  except 
  on 
  the 
  

   posterior 
  margin 
  ; 
  mesonotum 
  

  

  and 
  scutellum 
  black 
  E. 
  ruficeps 
  ruficeps, 
  Sm. 
  

  

  b 
  2 
  . 
  Pronotum 
  and 
  scutellum 
  red. 
  

  

  « 
  3 
  . 
  Mesonotum 
  almost 
  entirely 
  [gamia, 
  Sauss. 
  

  

  black 
  E. 
  ruficeps 
  diaphero- 
  

  

  b*. 
  Mesonotum 
  red 
  E. 
  ruficeps 
  atopogamia, 
  

  

  [Sauss. 
  

   <3 
  S- 
  A. 
  Posterior 
  tibias 
  and 
  tarsi 
  testaceous. 
  

   Wings 
  clear 
  hyaline, 
  without 
  blue 
  

  

  gloss 
  E. 
  nodosa, 
  Guer. 
  

  

  B. 
  Posterior 
  tibiae 
  and 
  tarsi 
  black 
  above, 
  

   sometimes 
  ferruginous 
  beneath. 
  

  

  a. 
  Wings 
  hyaline, 
  slightly 
  glossed 
  

  

  with 
  blue 
  E. 
  ruficeps 
  diaphero- 
  

  

  b. 
  Wings 
  strongly 
  shaded 
  with 
  fus- 
  gamia, 
  Sauss. 
  

  

  cons. 
  ( 
  = 
  disjuncta, 
  Turn.). 
  

  

  a 
  3 
  . 
  Abdomen 
  finely 
  but 
  distinctly 
  

   punctured, 
  with 
  short 
  pubes- 
  

   cence 
  E. 
  ruficeps 
  ruficeps, 
  Sm 
  . 
  

  

  b 
  2 
  . 
  Abdomen 
  obsoletely 
  punctured 
  

  

  at 
  the 
  base, 
  shining 
  and 
  with 
  [Sauss. 
  

  

  less 
  pubescence 
  E. 
  ruficeps 
  atopogamia, 
  

  

  The 
  comparative 
  length 
  of 
  the 
  second 
  and 
  third 
  abscissae 
  

   of 
  the 
  radius 
  does 
  not 
  seem 
  to 
  be 
  quite 
  constant 
  in 
  either 
  

   sex, 
  but 
  the 
  second 
  abscissa 
  is 
  shorter 
  in 
  hova 
  and 
  diaphero- 
  

   gamia 
  than 
  in 
  the 
  other 
  forms. 
  Hova 
  also 
  differs 
  in 
  being 
  

   more 
  closely 
  punctured. 
  In 
  nodosa, 
  Guer., 
  the 
  basal 
  abdo- 
  

   minal 
  segment 
  is 
  much 
  more 
  slender 
  than 
  in 
  the 
  other 
  forms. 
  

  

  