﻿CONTRIBUTION 
  TO 
  KNOWLEDGE 
  OF 
  TABANIDAE 
  OP 
  PALESTINE. 
  305 
  

  

  sometimes 
  darker 
  (seal-brown 
  or 
  light 
  seal-brown) 
  at 
  base. 
  Legs 
  : 
  coxae 
  pale 
  

   drab-grey 
  or 
  smoke-grey 
  pollinose, 
  clothed 
  with 
  whitish 
  hair 
  ; 
  femora 
  and 
  tibiae 
  

   of 
  middle 
  and 
  hind 
  legs, 
  and 
  proximal 
  halves 
  or 
  rather 
  less 
  than 
  proximal 
  halves 
  

   of 
  front 
  tibiae, 
  cinnamon-buff 
  or 
  pinkish 
  cinnamon- 
  coloured, 
  middle 
  and 
  hind 
  

   femora 
  drab-grey 
  pollinose 
  ; 
  middle 
  and 
  hind 
  tarsi 
  dark 
  brown 
  above, 
  first 
  joint 
  

   of 
  middle 
  tarsi 
  sometimes 
  paler 
  towards 
  base 
  ; 
  third 
  and 
  fourth 
  joints 
  of 
  middle 
  

   and 
  hind 
  tarsi 
  distinctly 
  expanded, 
  rather 
  broad 
  ; 
  femora 
  clothed 
  with 
  whitish 
  

   hair 
  ; 
  middle 
  and 
  hind 
  tibiae 
  and 
  proximal 
  halves 
  of 
  front 
  tibiae 
  clothed 
  with 
  short, 
  

   glistening, 
  appressed 
  yellowish-white 
  hair, 
  which 
  on 
  anterior 
  margin 
  of 
  outer 
  side 
  

   of 
  hind 
  tibiae 
  is 
  elongated 
  so 
  as 
  to 
  form 
  a 
  fringe 
  ; 
  upper 
  surfaces 
  of 
  tarsi 
  and 
  distal 
  

   halves 
  of 
  front 
  tibiae 
  clothed 
  with 
  minute 
  black 
  hairs, 
  extensor 
  surfaces 
  of 
  middle 
  

   and 
  hind 
  tibiae, 
  especially 
  towards 
  tips, 
  also 
  largely 
  clothed 
  with 
  similar 
  hairs. 
  

  

  Wadi 
  el 
  Kelt, 
  Jordan 
  Valley, 
  near 
  Jericho 
  : 
  type 
  of 
  <J 
  and 
  one 
  para-type 
  of 
  the 
  

   same 
  sex, 
  5.vi.l918, 
  on 
  cliff 
  wall, 
  5.30 
  p.m. 
  ; 
  type 
  of 
  5 
  and 
  one 
  $ 
  para-type 
  l.vi. 
  

   1918 
  ; 
  an 
  additional 
  $ 
  para-type 
  25.V.1918, 
  resting 
  on 
  the 
  author's 
  tent 
  (pitched 
  

   above 
  the 
  Wadi, 
  close 
  to 
  the 
  point 
  at 
  which 
  the 
  old 
  Jerusalem-Jericho 
  road 
  enters 
  

   the 
  Valley), 
  6.30 
  a.m. 
  

  

  On 
  several 
  evenings 
  at 
  the 
  beginning 
  of 
  June 
  1918, 
  towards 
  sunset, 
  a 
  number 
  

   of 
  specimens 
  of 
  this 
  species, 
  which 
  was 
  not 
  met 
  with 
  elsewhere, 
  were 
  found 
  resting 
  

   on 
  the 
  precipitous 
  earth 
  cliffs 
  forming 
  the 
  sides 
  of 
  the 
  Wadi 
  el 
  Kelt, 
  just 
  where 
  the 
  

   wild 
  gorge 
  in 
  question 
  leaves 
  the 
  hills. 
  

  

  Tahanus 
  rupinae, 
  which 
  is 
  not 
  closely 
  allied 
  to 
  any 
  of 
  its 
  congeners 
  known 
  to 
  the 
  

   writer, 
  presents 
  a 
  very 
  slight 
  superficial 
  resemblance 
  to 
  the 
  Mesopotamian 
  

   T. 
  polygonus, 
  Walk., 
  but 
  is 
  distinguishable 
  at 
  once, 
  inter 
  alia, 
  by 
  the 
  somewhat 
  wider 
  

   front 
  in 
  the 
  $ 
  ; 
  by 
  the 
  lower 
  frontal 
  callus 
  in 
  the 
  same 
  sex 
  being 
  transversely 
  quad- 
  

   rate, 
  instead 
  of 
  vertically 
  ogival 
  and 
  prolonged 
  above 
  into 
  a 
  narrow 
  line 
  ; 
  by 
  the 
  

   second 
  abdominal 
  tergite 
  in 
  both 
  sexes 
  being 
  without 
  any 
  trace 
  of 
  a 
  blackish 
  median 
  

   spot 
  at 
  the 
  base 
  ; 
  by 
  the 
  anterior 
  branch 
  of 
  the 
  third 
  longitudinal 
  vein 
  being 
  

   abruptly 
  angulate 
  at 
  the 
  base 
  and 
  provided 
  with 
  a 
  long 
  appendix 
  ; 
  and 
  by 
  the 
  very 
  

   different 
  coloration 
  of 
  the 
  front 
  legs. 
  

  

  12. 
  Tabanus 
  arenivagus, 
  sp. 
  n. 
  (figs. 
  9, 
  10). 
  

  

  (J$. 
  — 
  Length, 
  <J 
  (3 
  specimens) 
  13'5 
  to 
  14 
  mm. 
  ; 
  $ 
  (10 
  specimens) 
  12 
  to 
  just 
  

   over 
  14 
  mm. 
  ; 
  width 
  of 
  head, 
  £ 
  4"5 
  to 
  4*75 
  mm., 
  $ 
  3'6 
  to 
  4*4 
  mm. 
  ; 
  width 
  of 
  front 
  

   of 
  2, 
  at 
  vertex 
  0*5 
  to 
  0'75 
  mm., 
  between 
  inner 
  angles 
  of 
  eyes 
  0"4 
  to 
  0*5 
  mm. 
  ; 
  length 
  

   of 
  wing, 
  (J 
  10'5 
  to 
  11 
  mm. 
  ; 
  $ 
  10 
  to 
  11*2 
  mm. 
  

  

  Small, 
  light 
  drab-coloured, 
  narrow-bodied, 
  species, 
  with 
  sides 
  of 
  abdomen 
  straight, 
  

   tapering 
  from 
  base 
  of 
  fifth 
  segment 
  in 
  <§, 
  and 
  from 
  that 
  of 
  second 
  segment 
  in 
  $ 
  ; 
  eyes 
  

   under 
  an 
  ordinary 
  hand-lens 
  appealing 
  bare 
  {merely 
  showing 
  sparse 
  microscopic 
  

   hairs 
  below), 
  in 
  <J 
  with 
  a 
  sharply 
  contrasted 
  area 
  of 
  greatly 
  enlarged 
  facets, 
  and 
  two 
  

   purplish-brown 
  transverse 
  bands, 
  in 
  $ 
  with 
  three 
  similarly 
  coloured 
  bands 
  ; 
  frontal 
  

   triangle 
  in 
  $ 
  and 
  subcallus 
  in 
  $ 
  ivith 
  a 
  shining 
  transverse 
  band, 
  extending 
  from 
  eye 
  to 
  

   eye 
  ; 
  <J 
  with 
  well-developed 
  though 
  sunken 
  ocellar 
  tubercle, 
  of 
  ivhich 
  there 
  is 
  no 
  trace 
  

   in 
  $; 
  latter 
  with 
  two 
  frontal 
  colli 
  ; 
  third 
  joint 
  of 
  antennae 
  ochraceous-buff 
  or 
  ochraceous- 
  

   orange, 
  narrow, 
  elongate 
  and 
  tapering, 
  its 
  upper 
  margin 
  not 
  excavated 
  but 
  with 
  a 
  blunt 
  

  

  