﻿Manchester 
  Memoirs, 
  Vol. 
  xliii. 
  (1899), 
  No. 
  3. 
  ^ 
  

  

  the 
  mandibles, 
  the 
  front 
  broad, 
  depressed 
  ; 
  the 
  eyes 
  mar- 
  

   gined 
  behind. 
  Antennae 
  of 
  medium 
  length, 
  not 
  much 
  longer 
  

   than 
  the 
  abdomen 
  ; 
  the 
  third 
  joint 
  slightly 
  longer 
  than 
  

   the 
  fourth. 
  Scutellum 
  raised 
  ; 
  its 
  centre 
  stoutly 
  longitu- 
  

   dinally 
  keeled 
  throughout. 
  Blotch 
  indistinct, 
  patellae 
  

   distinct 
  ; 
  the 
  claws 
  bifid. 
  Wings 
  as 
  in 
  Tentkredo 
  ; 
  the 
  

   humeral 
  nervure 
  in 
  the 
  hind 
  wings 
  received 
  beyond 
  the 
  

   transverse 
  discoidal. 
  

  

  Differs 
  from 
  Tentkredo 
  in 
  the 
  eyes 
  converging 
  beneath 
  

   and 
  in 
  not 
  reaching 
  to 
  the 
  base 
  of 
  the 
  mandibles. 
  The 
  

   antennae 
  are 
  longer 
  than 
  in 
  Rhogogastera, 
  and 
  with 
  the 
  

   third 
  joint 
  shorter 
  compared 
  with 
  the 
  fourth. 
  The 
  prin- 
  

   cipal 
  feature, 
  however, 
  of 
  the 
  genus 
  lies 
  in 
  the 
  very 
  strongly 
  

   keeled 
  scutellum, 
  a 
  structure 
  which 
  does 
  not 
  occur 
  in 
  any 
  

   known 
  species 
  of 
  the 
  TentJiredinides. 
  The 
  pleurae 
  are 
  

   straight, 
  not 
  rounded 
  on 
  the 
  lower 
  side, 
  the 
  edge 
  at 
  its 
  

   junction 
  with 
  the 
  sternum 
  being 
  distinctly 
  margined; 
  the 
  

   orbits 
  behind 
  have 
  a 
  sharp 
  keel 
  above 
  but 
  not 
  on 
  the 
  

   extreme 
  outer 
  edge. 
  The 
  parapsidal 
  furrows 
  are 
  not 
  very 
  

   distinctly 
  defined. 
  The 
  fore 
  calcaria 
  are 
  rather 
  peculiar, 
  

   they 
  are 
  straight 
  above 
  ; 
  the 
  apex 
  much 
  narrowed 
  and 
  

   sharp 
  ; 
  before 
  it 
  is 
  a 
  large, 
  acute, 
  straight 
  projection, 
  much 
  

   larger 
  than 
  usual. 
  

  

  Rethra 
  carinata, 
  sp. 
  110V. 
  

  

  Nigra; 
  capite 
  thoraceque 
  punctatis, 
  ore 
  pedibusque 
  

   flavis, 
  genicidis, 
  tibiis 
  tarsisque 
  posticis 
  nigris 
  ; 
  a/is 
  fulvo- 
  

   hyalinis, 
  nervis 
  stigmateque 
  nigris. 
  ?. 
  

  

  Long. 
  1 
  1 
  mm. 
  

  

  Antennae 
  black 
  ; 
  the 
  scape 
  sparsely 
  pilose 
  ; 
  the 
  flag- 
  

   ellum 
  almost 
  glabrous. 
  Front 
  and 
  vertex 
  punctured, 
  the 
  

   vertex 
  finely 
  and 
  closely, 
  the 
  front 
  coarsely, 
  especially 
  in 
  

   the 
  middle, 
  but 
  the 
  sides 
  of 
  the 
  front 
  at 
  the 
  apex 
  are 
  

   smooth 
  and 
  shining 
  ; 
  the 
  front 
  depressed 
  in 
  the 
  middle. 
  

  

  