﻿CONTRIBUTION 
  TO 
  KNOWLEDGE 
  OF 
  TABANIDAE 
  OF 
  PALESTINE. 
  319 
  

  

  The 
  species 
  characterised 
  above 
  is 
  also 
  allied 
  to 
  T. 
  laetetinctus, 
  Becker, 
  the 
  typical 
  

   series 
  of 
  which 
  was 
  obtained 
  in 
  Persian 
  Baluchistan 
  ; 
  so 
  far 
  as 
  can 
  be 
  judged 
  from. 
  

   Becker's 
  description, 
  however, 
  T. 
  pallidipes 
  is 
  distinguished, 
  inter 
  alia, 
  by 
  the 
  much 
  

   narrower 
  front 
  in 
  the 
  Q, 
  and 
  by 
  the 
  infuscated 
  tarsi. 
  

  

  16. 
  Tabanus 
  dalei, 
  sp. 
  n. 
  (figs. 
  17, 
  18.) 
  

  

  ^ 
  — 
  Length 
  (1 
  specimen) 
  12*5 
  mm. 
  ; 
  width 
  of 
  head 
  4*75 
  mm. 
  ; 
  length 
  of 
  wing 
  

   11 
  mm. 
  

  

  Dorsum 
  of 
  thorax 
  dusky 
  neutral 
  grey, 
  shining 
  ; 
  dorsum 
  of 
  abdomen 
  slate-black 
  \. 
  

   second 
  and 
  four 
  following 
  segments 
  ivith 
  posterior 
  transverse 
  bands 
  of 
  appressed, 
  

   glistening, 
  silvery 
  -white 
  hair 
  ; 
  eyes 
  bare 
  ; 
  wings 
  hyaline, 
  extreme 
  base, 
  costal 
  and 
  

   subcostal 
  cells, 
  and 
  proximal 
  half 
  (narrow 
  portion) 
  of 
  marginal 
  cell 
  ochraceous 
  tawny, 
  

   contrasting 
  sharply 
  with 
  remainder 
  of 
  surface 
  ; 
  legs 
  black, 
  extensor 
  surfaces 
  of 
  all 
  tibiae,, 
  

   except 
  at 
  distal 
  extremities, 
  clothed 
  with 
  glistening 
  whitish 
  or 
  yellowish 
  hair. 
  

  

  Fig. 
  17. 
  Tabanus 
  dalei, 
  

   Austen, 
  head 
  of 
  <$ 
  in 
  pro- 
  

   file. 
  X 
  about 
  10. 
  

  

  Head 
  of 
  $ 
  small, 
  frontal 
  triangle, 
  face 
  and 
  jowls 
  smoke- 
  grey 
  pollinose, 
  face 
  and 
  

   jowls 
  clothed 
  with 
  whitish 
  hair 
  ; 
  occiput 
  neutral 
  grey 
  pollinose, 
  posterior 
  margin 
  

   fringed 
  at 
  sides 
  and 
  above 
  with 
  erect, 
  yellowish 
  hair, 
  longer 
  in 
  region 
  of 
  vertex, 
  

   and 
  mingled 
  on 
  each 
  side 
  of 
  vertical 
  region 
  with 
  a 
  certain 
  number 
  of 
  black 
  or 
  blackish 
  

   hairs 
  ; 
  ocellar 
  tubercle 
  inconspicuous, 
  sunk 
  in 
  vertical 
  triangle 
  ; 
  eyes 
  in 
  $ 
  each 
  

   with 
  an 
  area 
  of 
  moderately 
  enlarged 
  facets 
  abutting 
  on 
  inner 
  margin, 
  but 
  such 
  

   facets 
  progressively 
  diminishing 
  in 
  size 
  towards 
  exterior 
  and 
  merging 
  gradually 
  

   into 
  remainder, 
  to 
  which 
  they 
  nowhere 
  present 
  a 
  sharp 
  contrast 
  ; 
  palpi 
  in 
  $ 
  dark 
  

   mouse 
  grey 
  pollinose, 
  clothed 
  with 
  whitish 
  hair, 
  terminal 
  segment 
  small, 
  bluntly 
  

   elliptical 
  ovate, 
  not 
  pointed 
  at 
  distal 
  extremity 
  ; 
  first 
  joint 
  of 
  antennae 
  in 
  $ 
  blackish 
  

   mouse 
  grey, 
  scarcely 
  swollen 
  distally, 
  sparsely 
  clothed 
  with 
  short 
  yellowish 
  hairs, 
  

   second 
  joint 
  blackish 
  brown, 
  with 
  a 
  few 
  yellowish 
  hairs 
  on 
  inner 
  side 
  and 
  minute 
  

   black 
  hairs 
  on 
  upper 
  distal 
  angle, 
  which 
  is 
  considerably 
  produced, 
  third 
  joint 
  dark 
  

   clove 
  brown 
  or 
  blackish|brown 
  (slightly 
  paler 
  at 
  extreme 
  base), 
  expanded 
  portion 
  

   of 
  moderate 
  depth 
  or 
  fairly 
  deep, 
  at 
  least 
  in 
  $, 
  with 
  a 
  blunt 
  but 
  prominent 
  

  

  