﻿274: 
  F. 
  W. 
  EDWAKDS. 
  

  

  Hind 
  tibiae 
  without 
  a 
  distinct 
  apical 
  pale 
  spot, 
  

  

  though 
  they 
  may 
  be 
  pale 
  beneath 
  throughout 
  

  

  their 
  whole 
  length 
  ; 
  proboscis 
  unhanded 
  ; 
  

  

  abdomen 
  distinctly 
  banded 
  . 
  . 
  . 
  . 
  . 
  . 
  lineatopennis 
  (Ludlow) 
  

  

  6. 
  Male 
  claspers 
  hairy 
  at 
  the 
  tip, 
  and 
  bearing 
  a 
  

  

  stout 
  blunt-ended 
  spine 
  . 
  . 
  . 
  . 
  . 
  . 
  palpalis 
  (Newst.) 
  

  

  Male 
  claspers 
  not 
  hairy 
  at 
  the 
  tip, 
  bearing 
  only 
  

  

  a 
  long, 
  curved, 
  tapering 
  spine 
  . 
  . 
  . 
  . 
  taeniarostris, 
  Theo. 
  

  

  Of 
  the 
  above 
  seven 
  species, 
  four 
  (punctocostalis,fuscinervis, 
  palpalis 
  and 
  taeniarostris) 
  

   are, 
  so 
  far 
  as 
  we 
  know 
  at 
  present, 
  confined 
  to 
  West 
  Africa, 
  and 
  two 
  (albicosta 
  and 
  

   luteolateralis) 
  to 
  East 
  Africa. 
  

  

  B. 
  albicosta, 
  Edw. 
  

  

  This 
  was 
  described 
  by 
  me 
  (Bull. 
  Ent. 
  Kes., 
  iv, 
  p. 
  47) 
  as 
  a 
  variety 
  of 
  B. 
  luteolateralis. 
  

   There 
  is 
  very 
  little 
  doubt, 
  however, 
  that 
  it 
  should 
  stand 
  as 
  a 
  distinct 
  species. 
  No 
  

   additional 
  specimens 
  have 
  been 
  received. 
  

  

  B. 
  luteolateralis, 
  Theo. 
  

  

  Theobald's 
  original 
  series 
  consisted 
  of 
  specimens 
  from 
  Durban 
  (Natal), 
  Salisbury 
  

   (Rhodesia), 
  and 
  the 
  Malay 
  States, 
  a 
  female 
  from 
  Durban 
  being 
  selected 
  as 
  the 
  

   female 
  type 
  and 
  a 
  specimen 
  from 
  Salisbury 
  being 
  chosen 
  to 
  represent 
  the 
  male. 
  

   Recently 
  I 
  have 
  re-examined 
  these 
  specimens 
  and 
  found 
  that 
  Theobald 
  had 
  made 
  

   the 
  error 
  of 
  associating 
  two 
  forms 
  under 
  one 
  name 
  and 
  placing 
  a 
  type 
  label 
  on 
  a 
  

   specimen 
  of 
  each. 
  In 
  this 
  case 
  there 
  can 
  be 
  no 
  doubt 
  that 
  the 
  specimen 
  on 
  which 
  

   his 
  description 
  was 
  mainly 
  based, 
  was 
  the 
  female 
  from 
  Durban, 
  and 
  unfortunately 
  

   this 
  is 
  very 
  much 
  the 
  rarer 
  of 
  the 
  two 
  forms, 
  being 
  still 
  unknown 
  outside 
  the 
  original 
  

   locality, 
  while 
  the 
  other 
  form 
  (B. 
  lineatopennis) 
  is 
  a 
  common 
  and 
  widespread 
  insect. 
  

   There 
  is 
  room 
  in 
  this 
  case 
  for 
  difference 
  of 
  opinion 
  as 
  to 
  whether 
  the 
  two 
  should 
  

   stand 
  as 
  species 
  or 
  varieties, 
  but 
  as 
  I 
  have 
  seen 
  no 
  African 
  specimens 
  at 
  all 
  inter- 
  

   mediate, 
  I 
  prefer 
  to 
  regard 
  them 
  as 
  species, 
  though 
  apart 
  from 
  the 
  characters 
  given 
  

   in 
  the 
  key 
  there 
  is 
  little 
  difference 
  between 
  the 
  two. 
  

  

  A 
  good 
  series 
  of 
  females, 
  and 
  one 
  male 
  of 
  the 
  true 
  B. 
  luteolateralis 
  have 
  recently 
  

   been 
  received 
  from 
  Durban 
  (L. 
  Bevis 
  and 
  C. 
  B. 
  Cooper). 
  The 
  male 
  genitalia 
  are 
  

   extremely 
  similar 
  to 
  those 
  of 
  B. 
  lineatopennis, 
  but 
  the 
  spine 
  at 
  the 
  tip 
  of 
  the 
  claspers 
  

   appears 
  to 
  be 
  thicker 
  and 
  more 
  blunt-ended. 
  

  

  B. 
  lineatopennis, 
  Ludlow. 
  

  

  I 
  have 
  previously 
  given 
  this 
  as 
  a 
  synonym 
  of 
  B. 
  luteolateralis, 
  but 
  it 
  proves 
  to 
  

   be 
  distinct 
  by 
  the 
  characters 
  just 
  mentioned. 
  It 
  is 
  widely 
  spread 
  in 
  both 
  the 
  

   Ethiopian 
  and 
  Oriental 
  regions, 
  but 
  in 
  Africa 
  (where 
  it 
  is 
  by 
  far 
  the 
  most 
  abundant 
  

   member 
  of 
  the 
  genus) 
  it 
  is 
  much 
  commoner 
  in 
  the 
  southern 
  and 
  eastern 
  portions 
  

   of 
  the 
  continent. 
  The 
  species 
  is 
  rather 
  variable 
  : 
  sometimes 
  the 
  yellow 
  scales 
  of 
  

   the 
  thorax 
  are 
  replaced 
  by 
  whitish 
  ones 
  (vars. 
  pallida 
  and 
  alboihorax) 
  and 
  some- 
  

   times 
  there 
  are 
  a 
  few 
  or 
  numerous 
  yellow 
  lateral 
  scales 
  on 
  the 
  second 
  and 
  fourth 
  

   longitudinal 
  veins.* 
  

  

  * 
  Carter 
  (Ann. 
  Trop. 
  Med., 
  vii, 
  p. 
  583, 
  1.913) 
  has 
  given 
  a 
  good 
  figure 
  of 
  the 
  genitalia 
  

   of 
  this 
  form, 
  and 
  also 
  of 
  B. 
  palpalis. 
  

  

  