﻿Mr. 
  1\. 
  E. 
  Turner 
  on 
  Fossorial 
  Hymenoptera. 
  301 
  

  

  the 
  whole 
  apical 
  margin, 
  the 
  angles 
  only 
  slightly 
  produced, 
  

   a 
  narrow 
  transverse 
  depression 
  on 
  the 
  middle 
  of 
  the 
  clypeus, 
  

   the 
  apical 
  half 
  slightly 
  porrect. 
  Mandibles 
  bidentate, 
  the 
  

   outer 
  tooth 
  acute, 
  the 
  inner 
  very 
  broadly 
  truncate. 
  Antenr.se 
  

   as 
  long 
  as 
  the 
  head, 
  thorax, 
  and 
  median 
  segment 
  combined, 
  

   the 
  apical 
  joints 
  slightly 
  arcuate. 
  Head 
  and 
  thorax 
  finely 
  

   and 
  closely 
  punctured, 
  abdomen 
  more 
  sparsely 
  punctui'ed 
  

   and 
  shining. 
  Median 
  segment 
  as 
  long 
  as 
  the 
  breadth 
  at 
  the 
  

   base. 
  Abdomen 
  rather 
  slender; 
  the 
  first 
  segment 
  gradually 
  

   broadened 
  from 
  the 
  base 
  ; 
  seventh 
  dorsal 
  segment 
  narrowly 
  

   truncate 
  at 
  the 
  apex, 
  the 
  lateral 
  margins 
  raised 
  j 
  hypo- 
  

   pygium 
  short 
  and 
  narrow, 
  rounded 
  at 
  the 
  apex. 
  Third 
  

   abscissa 
  of 
  the 
  radius 
  a 
  little 
  longer 
  than 
  the 
  second, 
  the 
  

   second 
  recurrent 
  nervure 
  received 
  at 
  one-third 
  from 
  the 
  base 
  

   of 
  the 
  third 
  cubital 
  cell. 
  

  

  Black 
  ; 
  the 
  mandibles 
  (except 
  at 
  the 
  apex), 
  clypeus 
  

   (except 
  the 
  depressed 
  line 
  on 
  the 
  middle), 
  the 
  frontal 
  pro- 
  

   minences 
  above 
  the 
  antennae, 
  the 
  margins 
  of 
  the 
  eyes 
  very 
  

   narrowly 
  (except 
  at 
  the 
  summit), 
  a 
  line 
  on 
  each 
  side 
  on 
  the 
  

   posterior 
  margin 
  of 
  the 
  head, 
  the 
  margins 
  of 
  the 
  pronotum, 
  

   a 
  small 
  spot 
  on 
  the 
  tegulae, 
  a 
  small 
  spot 
  on 
  the 
  mesopleurae, 
  

   a 
  large 
  spot 
  on 
  the 
  scutellum 
  and 
  a 
  small 
  one 
  at 
  each 
  of 
  the 
  

   anterior 
  angles, 
  a 
  line 
  on 
  the 
  postscutellum, 
  a 
  broad 
  longi- 
  

   tudinal 
  band 
  on 
  each 
  side 
  on 
  the 
  median 
  segment, 
  a 
  large 
  

   spot 
  on 
  each 
  side 
  on 
  dorsal 
  abdominal 
  segments 
  1-4, 
  and 
  a 
  

   line 
  on 
  the 
  anterior 
  tibise 
  beneath 
  yellow; 
  anterior 
  tarsi 
  

   luteous. 
  Wings 
  shaded 
  with 
  fuscous, 
  a 
  little 
  more 
  deeply 
  

   in 
  the 
  radial 
  cell 
  than 
  elsewhere; 
  nervures 
  fuscous, 
  stigma 
  

   testaceous. 
  

  

  Length 
  13 
  mm. 
  

  

  Hub. 
  Tucuman, 
  N. 
  Argentina 
  (Steinbach). 
  

  

  Type 
  in 
  Berlin 
  Museum. 
  

  

  Near 
  the 
  group 
  of 
  E. 
  maculipennis, 
  Guer., 
  but 
  is 
  a 
  less 
  

   robust 
  species, 
  the 
  clypeus 
  is 
  more 
  produced 
  and 
  much 
  

   narrower 
  at 
  the 
  apex, 
  and 
  the 
  difference 
  in 
  colouring 
  is 
  

   considerable. 
  

  

  Genus 
  Thynnus. 
  

  

  The 
  species 
  placed 
  in 
  this 
  genus 
  in 
  my 
  paper 
  on 
  the 
  

   Thynnidse 
  of 
  the 
  Hungarian 
  Museum 
  (Ann. 
  Mus. 
  Nat. 
  

   Hung. 
  viii. 
  1910) 
  were 
  not 
  published 
  in 
  time 
  for 
  inclusion 
  

   in 
  my 
  revision 
  ofgthe 
  family 
  in 
  Wytsman's 
  'Genera 
  In- 
  

   sectorum.' 
  The 
  following 
  changes 
  in 
  the 
  generic 
  names 
  are 
  

   necessary 
  : 
  — 
  Thynnus 
  (Zeleboria) 
  compar 
  should 
  be 
  placed 
  in 
  

   Neozeltboria, 
  Rohw. 
  {Zeleboria, 
  Turn.) 
  ; 
  T. 
  {ALolothynnns) 
  

   exiguits 
  and 
  T. 
  {/Eofathynnus) 
  lactarius 
  should 
  be 
  included 
  

  

  