﻿298 
  Mr. 
  R. 
  E. 
  Turner 
  on 
  Fossorial 
  Hymenoptera. 
  

  

  the 
  first 
  segment 
  shining 
  and 
  sparsely 
  punctured, 
  narrowed 
  

   towards 
  the 
  base 
  and 
  produced 
  into 
  a 
  bluntly 
  rounded 
  pro- 
  

   minence 
  which 
  projects 
  over 
  the 
  apex 
  of 
  the 
  median 
  segment 
  ; 
  

   second 
  segment 
  slightly 
  broadened 
  from 
  the 
  base, 
  with 
  three 
  

   well-marked 
  transverse 
  carinas, 
  in 
  addition 
  to 
  which 
  the 
  

   apical 
  margin 
  is 
  slightly 
  raised; 
  the 
  remaining 
  segments 
  

   shining 
  and 
  very 
  sparsely 
  punctured 
  ; 
  pygidium 
  almost 
  

   vertically 
  truncate, 
  the 
  surface 
  of 
  the 
  truncation 
  rugose, 
  

   small 
  and 
  ovate, 
  the 
  ventral 
  plate 
  projecting 
  beyond 
  the 
  

   dorsal 
  and 
  pointed 
  at 
  the 
  apex. 
  Ventral 
  segments 
  sparsely 
  

   punctured, 
  most 
  deeply 
  on 
  the 
  fifth. 
  

  

  Black 
  ; 
  the 
  first 
  dorsal 
  abdominal 
  segment 
  (except 
  at 
  the 
  

   base 
  and 
  on 
  the 
  middle 
  of 
  the 
  apical 
  margin), 
  a 
  small 
  spot 
  

   on 
  each 
  side 
  near 
  the 
  base 
  of 
  the 
  second 
  segment, 
  a 
  large 
  

   spot 
  on 
  each 
  side 
  on 
  the 
  third 
  and 
  fourth 
  segments, 
  and 
  a 
  

   small 
  spot 
  on 
  each 
  side 
  of 
  the 
  fifth 
  segment 
  yellow 
  ; 
  legs 
  

   testaceous 
  brown 
  ; 
  mandibles 
  and 
  antennae 
  fuscous. 
  

  

  Length 
  8 
  mm. 
  

  

  Hab. 
  Tucuman, 
  N. 
  Argentina 
  (Steinbach). 
  

  

  Type 
  in 
  Berlin 
  Museum. 
  

  

  The 
  shape 
  of 
  the 
  first 
  abdominal 
  segment 
  somewhat 
  recalls 
  

   S. 
  bituberculatus, 
  Turn. 
  

  

  Parelaphroptera 
  rollei, 
  Turn. 
  

  

  Pneudelaphroptera 
  rollei, 
  Turn. 
  Trans. 
  Ent. 
  Soc. 
  London, 
  p. 
  72 
  

  

  (1908). 
  J. 
  

   Parelaphroptera 
  rollei, 
  Turn. 
  Wytsrnan's 
  Genera 
  Insectorum, 
  cv. 
  

  

  p. 
  21. 
  S. 
  

  

  ? 
  . 
  Mandibles 
  simple, 
  not 
  bidentate 
  ; 
  clypeus 
  without 
  a 
  

   carina, 
  the 
  anterior 
  margin 
  transverse. 
  Head 
  distinctly 
  

   broader 
  than 
  long, 
  slightly 
  narrowed 
  anteriorly, 
  the 
  posterior 
  

   angles 
  rounded, 
  shining 
  and 
  almost 
  smooth, 
  with 
  a 
  very 
  

   short 
  frontal 
  sulcus, 
  the 
  position 
  of 
  the 
  ocelli 
  indicated 
  by 
  

   shallow 
  and 
  rather 
  indistinct 
  punctures, 
  the 
  cheeks 
  produced 
  

   at 
  the 
  base 
  of 
  the 
  mandibles 
  into 
  a 
  blunt 
  tubercle 
  notched 
  at 
  

   the 
  apex. 
  Antennae 
  short, 
  the 
  length 
  of 
  the 
  flagellum 
  not 
  

   exceeding 
  the 
  length 
  of 
  the 
  head. 
  Pronotum 
  nearly 
  twice 
  as 
  

   broad 
  as 
  long, 
  the 
  sides 
  parallel, 
  almost 
  as 
  broad 
  as 
  the 
  head, 
  

   finely 
  and 
  closely 
  punctured 
  ; 
  scutellum 
  much 
  broader 
  than 
  

   long, 
  narrowed 
  towards 
  the 
  apex 
  and 
  sparsely 
  punctured 
  ; 
  

   median 
  segment 
  as 
  long 
  as 
  the 
  pronotum, 
  broadened 
  from 
  the 
  

   base, 
  very 
  steeply 
  sloped 
  posteriorly, 
  sparsely 
  punctured. 
  

   First 
  abdominal 
  segment 
  vertically 
  truncate 
  at 
  the 
  base, 
  much 
  

   shorter 
  than 
  the 
  second 
  and 
  not 
  much 
  narrowed 
  anteriorly 
  ; 
  

   second 
  segment 
  with 
  a 
  low 
  carina 
  near 
  the 
  base, 
  another, 
  

   higher, 
  near 
  the 
  apex 
  separated 
  by 
  a 
  deep 
  groove 
  from 
  the 
  

  

  