﻿ON 
  SOME 
  AFRICAN 
  DELPHACIDAE. 
  141 
  

  

  Opening 
  of 
  pygofer 
  about 
  as 
  broad 
  as 
  long, 
  dorsal 
  emargination 
  large, 
  anal 
  angles 
  

   well 
  produced, 
  slightly 
  curved 
  ; 
  genital 
  styles 
  straight, 
  outer 
  edge 
  slightly 
  sinuous, 
  

   inner 
  edge 
  produced 
  into 
  a 
  quadrate 
  process 
  near 
  base, 
  apex 
  truncate 
  ; 
  aedeagus 
  

   flattened 
  laterally, 
  broad, 
  apex 
  rounded, 
  an 
  irregular 
  row 
  of 
  spines 
  from 
  near 
  apex 
  

   on 
  dorsal 
  aspect 
  across 
  left 
  side 
  to 
  near 
  the 
  medio- 
  ventral 
  area, 
  a 
  somewhat 
  similar 
  

   row 
  on 
  right 
  side 
  ; 
  anal 
  spines 
  large, 
  curved, 
  their 
  bases 
  near 
  together. 
  

  

  Length, 
  2 
  mm. 
  ; 
  tegmen, 
  2 
  '2 
  mm. 
  

  

  Nigeria 
  : 
  Oloke-Meji 
  (J. 
  C. 
  Bridwell). 
  

  

  Described 
  from 
  one 
  male. 
  

  

  Dicranotropis 
  bridwelli, 
  sp. 
  nov. 
  (fig. 
  3). 
  

  

  $. 
  Macropterous 
  ; 
  head 
  as 
  broad 
  as 
  pro 
  thorax 
  ; 
  width 
  twice 
  the 
  length, 
  including 
  

   eyes 
  ; 
  vertex 
  square 
  ; 
  length 
  of 
  face 
  nearly 
  twice 
  the 
  width 
  (1 
  to 
  1*8), 
  narrowed 
  

   between 
  eyes 
  and 
  slightly 
  at 
  apex, 
  median 
  carina 
  furcate 
  about 
  middle 
  ; 
  length 
  

   of 
  the 
  first 
  joint 
  of 
  antennae 
  slightly 
  more 
  than 
  half 
  the 
  second, 
  terete. 
  Length 
  

   of 
  first 
  joint 
  of 
  hind 
  tarsus 
  equal 
  to 
  the 
  other 
  two 
  together 
  ; 
  spur 
  as 
  long 
  as 
  first 
  

   joint 
  of 
  tarsus, 
  thin, 
  concavo-convex, 
  with 
  many 
  small 
  teeth 
  on 
  hind 
  margin. 
  

  

  Fig. 
  3. 
  Dicranotropis 
  bridwelli 
  Muir, 
  sp. 
  n. 
  ; 
  

   a, 
  pygofer, 
  back 
  view 
  ; 
  b, 
  do., 
  side 
  view. 
  

  

  Dark 
  chestnut-brown 
  or 
  black 
  ; 
  antennae, 
  carinae 
  on 
  head 
  and 
  thorax, 
  rostrum 
  

   and 
  legs 
  lighter 
  brown 
  ; 
  base 
  of 
  dorsum 
  of 
  abdomen 
  and 
  middle 
  of 
  apical 
  tergite 
  

   light. 
  Tegmina 
  hyaline, 
  fuscous, 
  a 
  clearer 
  hyaline 
  area 
  over 
  subcostal, 
  radial 
  and 
  

   median 
  apical 
  cells, 
  veins 
  of 
  the 
  same 
  colour 
  as 
  membrane, 
  granules 
  small, 
  bearing 
  

   small 
  black 
  hairs 
  ; 
  wings 
  hyaline 
  with 
  brown 
  veins. 
  

  

  Pygofer 
  as 
  figured 
  (fig. 
  3). 
  

  

  Length, 
  2*9 
  mm. 
  ; 
  tegmen, 
  3*8 
  mm. 
  

  

  Nigeria 
  : 
  Oloke-Meji, 
  Ibadan, 
  1914, 
  on 
  coarse 
  grass 
  (J. 
  C. 
  Bridwell). 
  

  

  Described 
  from 
  one 
  male 
  specimen. 
  There 
  are 
  two 
  female 
  specimens 
  in 
  the 
  

   collection 
  which 
  may 
  be 
  this 
  species 
  ; 
  they 
  are 
  much 
  lighter, 
  being 
  nearly 
  uniformly 
  

   light 
  brown. 
  

  

  Dicranotropis 
  ibadanensis, 
  sp. 
  nov. 
  (fig. 
  4). 
  

  

  (J. 
  Macropterous 
  ; 
  head 
  as 
  wide 
  as 
  pronotum, 
  width 
  2 
  '2 
  times 
  the 
  length 
  

   including 
  eyes 
  ; 
  vertex 
  square 
  or 
  very 
  slightly 
  wider 
  than 
  long, 
  base 
  slightly 
  behind 
  

   middle 
  of 
  eye 
  ; 
  length 
  of 
  face 
  twice 
  the 
  width, 
  sides 
  slightly 
  curved, 
  narrowest 
  

  

  