﻿156 
  

  

  BRUCE 
  F. 
  CUMMINGS. 
  

  

  parasite 
  from 
  the 
  eland 
  the 
  sternal 
  plate 
  is 
  a 
  sexually 
  dimorphic 
  character* 
  and 
  in 
  

   the 
  male 
  exhibits 
  the 
  form 
  illustrated 
  in 
  fig. 
  1 
  b, 
  with 
  which 
  may 
  be 
  compared 
  the 
  

   sternal 
  plate 
  of 
  the 
  female 
  (fig. 
  1 
  c). 
  

  

  On 
  the 
  male 
  genital 
  plate 
  a 
  transverse 
  row 
  of 
  hairs 
  is 
  present, 
  usually 
  four 
  in 
  

   number. 
  Midway, 
  each 
  lateral 
  margin 
  is 
  deeply, 
  incased 
  so 
  that 
  the 
  anterior 
  half 
  of 
  

   the 
  plate 
  is 
  in 
  part 
  separated 
  from 
  the 
  rest. 
  Both 
  sternal 
  and 
  genital 
  plates 
  are 
  some- 
  

   what 
  variable 
  characters 
  in 
  the 
  male 
  of 
  H. 
  tuberculatus 
  and 
  they 
  are 
  by 
  no 
  means 
  

  

  Fig. 
  1. 
  Haematopinus 
  taurotragi, 
  sp. 
  nov; 
  

   (a) 
  Terminal 
  abdominal 
  segments 
  of 
  $, 
  underside: 
  D, 
  dorsal 
  plate: 
  G, 
  gonopod 
  (the 
  

   elongate 
  hairs 
  on 
  the 
  margin, 
  are 
  omitted) 
  ; 
  V, 
  ventral 
  plate,— 
  (b) 
  Thoracic 
  sternite 
  of 
  $. 
  

   — 
  (c) 
  Thoracic 
  sternite 
  of 
  g.^d) 
  Mouth-parts 
  : 
  D, 
  rostral 
  denticles; 
  •-» 
  larynx; 
  M, 
  

   mandible; 
  R, 
  rostrum 
  ; 
  the 
  needle-like 
  trophi 
  are 
  omitted. 
  

  

  constant 
  in 
  the 
  form 
  now 
  under 
  consideration. 
  But 
  the 
  male 
  sternal 
  plate 
  of 
  the 
  one 
  

   never 
  approaches 
  the 
  form 
  shown 
  in 
  the 
  other, 
  and 
  it 
  may 
  be 
  said 
  that, 
  as 
  a 
  rule, 
  the 
  

   row 
  of 
  hairs 
  on 
  the 
  genital 
  plate 
  in 
  H. 
  tuberculatus 
  ? 
  consists 
  of 
  more 
  than 
  four, 
  while 
  

   the 
  lateral 
  incisions 
  are 
  less 
  deep. 
  

  

  The 
  feniale 
  genital 
  plates 
  offer 
  very 
  excellent 
  distinguishing 
  characters. 
  They 
  

   are 
  two 
  in 
  number, 
  in 
  the 
  position 
  and 
  of 
  the. 
  conformation 
  indicated 
  in 
  the 
  figuref 
  

   In 
  H. 
  tuberculatus 
  the 
  ventral 
  plate 
  of 
  t^e 
  female 
  is 
  in 
  the 
  form 
  of 
  a 
  fleur 
  de 
  lys. 
  

  

  