﻿Manchester 
  Memoirs, 
  Vol. 
  xliv. 
  (1900), 
  No. 
  15. 
  ill 
  

  

  the 
  mandibles. 
  Clypeus 
  small, 
  separated 
  by 
  a 
  suture 
  from 
  

   the 
  face, 
  its 
  apex 
  obliquely 
  depressed 
  transversely 
  ; 
  the 
  

   labrum 
  prominent, 
  rounded. 
  Mandibles 
  stout, 
  short, 
  

   ending 
  in 
  two 
  subequal 
  teeth. 
  Parapsidal 
  furrows 
  

   distinct. 
  Scutellum 
  large, 
  roundly 
  convex. 
  Median 
  

   segment 
  with 
  one 
  transverse 
  keel 
  near 
  the 
  base 
  ; 
  its 
  

   spiracles 
  moderately 
  large, 
  linear, 
  rounded 
  at 
  the 
  base 
  and 
  

   apex. 
  Wings 
  without 
  an 
  areolet, 
  there 
  being 
  only 
  one 
  

   transverse 
  cubital 
  nervure; 
  the 
  cubital 
  and 
  radial 
  nervures 
  

   almost 
  united, 
  the 
  transverse 
  cubital 
  nervures 
  being 
  very 
  

   short 
  ; 
  the 
  recurrent 
  nervure 
  is 
  interstitial, 
  as 
  is 
  also 
  the 
  

   transverse 
  median 
  ; 
  the 
  discoidal 
  nervure 
  is 
  obliquely 
  

   curved 
  on 
  the 
  basal 
  half. 
  Legs 
  elongate, 
  especially 
  the 
  

   hinder 
  pair, 
  which 
  have 
  the 
  coxae 
  large 
  ; 
  the 
  basal 
  joint 
  

   of 
  their 
  trochanters 
  more 
  than 
  twice 
  the 
  length 
  of 
  the 
  

   apical 
  ; 
  the 
  tarsi 
  spinose 
  ; 
  the 
  metatarsus 
  as 
  long 
  as 
  the 
  

   other 
  joints 
  united; 
  the 
  intermediate 
  and 
  hinder 
  tibiae 
  with 
  

   two 
  spurs. 
  Petiole 
  curved 
  ; 
  gradually, 
  but 
  not 
  greatly, 
  

   dilated 
  towards 
  the 
  apex 
  ; 
  the 
  spiracles 
  placed 
  shortly 
  

   beyond 
  the 
  middle, 
  the 
  second 
  segment 
  triangular, 
  narrow 
  

   at 
  the 
  base, 
  becoming 
  gradually 
  wider 
  towards 
  the 
  apex, 
  

   which 
  is 
  transverse 
  ; 
  the 
  gastrocceli 
  indistinct 
  ; 
  the 
  third 
  and 
  

   following 
  segments 
  are 
  wider 
  than 
  long; 
  the 
  third, 
  fourth 
  

   and 
  fifth 
  segments 
  have 
  large 
  depressions 
  on 
  the 
  sides, 
  

   their 
  middle 
  roundly 
  raised, 
  the 
  hypopygium 
  large, 
  tri- 
  

   angular 
  at 
  the 
  apex, 
  flat 
  ; 
  the 
  cerci 
  short, 
  stout, 
  pilose. 
  

  

  The 
  short 
  thick 
  antennae 
  with 
  comparatively 
  few 
  joints, 
  

   and 
  the 
  similarity 
  in 
  the 
  alar 
  neuration, 
  might 
  place 
  it 
  

   near 
  Acoenites. 
  In 
  the 
  absence 
  of 
  the 
  2 
  , 
  its 
  exact 
  

   relationship 
  cannot 
  be 
  very 
  clearly 
  defined. 
  

  

  It 
  comes 
  nearest 
  to 
  the 
  Tryplionides 
  and 
  is 
  closely 
  

   related 
  to 
  Chreusa, 
  Hemigaster 
  and 
  Macrogaster, 
  with 
  

   which 
  it 
  agrees 
  in 
  the 
  neuration 
  of 
  the 
  wings 
  and 
  in 
  the 
  

   paucity 
  of 
  joints 
  in 
  the 
  antennae, 
  but 
  may 
  be 
  known 
  from 
  

  

  