﻿NEOTROPICAL 
  MALLOPHAGA 
  — 
  CARRIKER 
  549 
  

  

  segments 
  I 
  and 
  II 
  is 
  absent. 
  The 
  abdominal 
  chaetotaxy 
  and 
  lateral 
  

   tergal 
  incrassations 
  are 
  very 
  similar 
  to 
  those 
  of 
  rotundoca'pitis. 
  

   Measurements 
  of 
  type: 
  

  

  Length 
  Width 
  

  

  Body 
  2.30 
  

  

  Head 
  

  

  ant. 
  fossae 
  .52 
  

  

  temples 
  . 
  467 
  . 
  694 
  

  

  occiput 
  .435 
  

  

  Prothorax 
  .31 
  .412 
  

  

  Meso-metathorax 
  .39 
  . 
  716 
  

  

  Abdomen 
  1. 
  34 
  . 
  94 
  

  

  Dennyus 
  similis, 
  new 
  species 
  

  

  Figure 
  G4,e,g 
  

  

  Types. 
  — 
  Male 
  and 
  female 
  adults 
  from 
  Progne 
  c. 
  chalybea 
  (Gmelin)' 
  

   collected 
  by 
  J. 
  Pablo 
  Anduze 
  at 
  Barinas, 
  Venezuela, 
  January 
  14, 
  

   1943 
  (in 
  Department 
  of 
  Hygiene, 
  Caracas, 
  Venezuela). 
  

  

  Diagnosis. 
  — 
  Somewhat 
  similar 
  to 
  D. 
  australis 
  Ewing, 
  from 
  which 
  it 
  

   differs 
  as 
  foUows: 
  Gular 
  plate 
  differently 
  shaped; 
  temples 
  more 
  convex 
  

   posteriorly; 
  lateral 
  wings 
  of 
  prothorax 
  less 
  pronounced 
  and 
  posterior 
  

   margin 
  slightly 
  concave 
  instead 
  of 
  convex; 
  the 
  sides 
  of 
  both 
  meso 
  thorax 
  

   andmetathorax 
  are 
  quite 
  straight 
  (except 
  for 
  slight 
  swelling 
  near 
  suture 
  

   on 
  metathorax), 
  while 
  these 
  segments 
  in 
  australis 
  are 
  convex 
  on 
  sides. 
  

  

  The 
  setae 
  along 
  posterior 
  margin 
  of 
  abdominal 
  tergites 
  consist 
  of 
  

   short, 
  thickened 
  hairs, 
  alternating 
  with 
  hairs 
  nearly 
  the 
  length 
  of 
  suc- 
  

   ceeding 
  segments, 
  while 
  in 
  australis 
  the 
  chaetotaxy 
  consists 
  of 
  slender 
  

   hairs, 
  sparsely 
  set, 
  and 
  mostly 
  longer 
  than 
  the 
  succeeding 
  segments; 
  

   the 
  patches 
  of 
  setae 
  on 
  femora 
  and 
  abdominal 
  sternites 
  are 
  composed 
  

   of 
  finer 
  hairs, 
  set 
  closer 
  together. 
  The 
  male 
  genitaUa 
  also 
  differs 
  

   slightly, 
  the 
  parameres 
  being 
  shorter 
  and 
  endomeral 
  sac 
  longer, 
  while 
  

   the 
  shape 
  of 
  the 
  basal 
  portion 
  of 
  the 
  basal 
  plate 
  is 
  quite 
  different. 
  

  

  Measurements 
  of 
  types: 
  

  

  Male 
  Female 
  

  

  Length 
  Width 
  Length 
  Width 
  

   Body 
  2.00 
  2.73 
  

  

  Head 
  

  

  ant. 
  fossae 
  . 
  464 
  .52 
  

  

  temples 
  .51 
  .66 
  .542 
  .738 
  

  

  occiput 
  .456 
  .467 
  

  

  Prothorax 
  .25 
  .369 
  .303 
  .423 
  

  

  Meso-metathorax 
  .303 
  .586 
  .367 
  .73 
  

  

  Abdomen 
  1.08 
  .78 
  1.75 
  1.01 
  

  

  Parameres 
  .217 
  .152 
  

  

  » 
  A 
  note 
  on 
  the 
  identity 
  of 
  this 
  host 
  is 
  in 
  press 
  (1954) 
  in 
  the 
  Boletfn 
  de 
  Entomologia 
  Venezolana. 
  

  

  U. 
  S. 
  GOVERNMENT 
  PRINTING 
  OFFICE: 
  l»S4 
  

  

  