﻿Mechanism 
  of 
  the 
  Male 
  Genital 
  Tube 
  in 
  Coleoptera. 
  413 
  

  

  My 
  thanks 
  are 
  due 
  to 
  Dr. 
  David 
  Sharp, 
  who 
  has 
  been 
  at 
  

   work 
  on 
  these 
  structures 
  for 
  several 
  years 
  and 
  has 
  accumu- 
  

   lated 
  a 
  mass 
  of 
  material 
  and 
  information, 
  both 
  of 
  which 
  

   have 
  been 
  freely 
  placed 
  at 
  my 
  disposal. 
  The 
  material 
  

   used 
  for 
  Rhynchojyhorus 
  was 
  supplied 
  to 
  him 
  by 
  Prof. 
  

   Bainbrigge 
  Fletcher 
  of 
  Pusa. 
  

  

  Explanation 
  of 
  Plate 
  XXI. 
  

  

  Figures 
  1-4 
  are 
  of 
  Rhynchophora 
  ; 
  .5-8 
  of 
  Strangalia 
  (Longicornia). 
  

  

  Fig. 
  1. 
  Lateral 
  view 
  of 
  skeleton 
  of 
  the 
  male 
  genitalia 
  of 
  Rhyn- 
  

   chophorus 
  ferrugineus. 
  

   la. 
  Tegminal 
  strut. 
  

  

  2. 
  Lateral 
  view 
  of 
  pseudotegmen 
  and 
  muscles 
  of 
  aedeagus. 
  

  

  3. 
  Apex 
  of 
  internal 
  sac 
  showing 
  the 
  attachment 
  of 
  muscles. 
  

  

  4. 
  Liternal 
  sac 
  evaginated. 
  

  

  5. 
  Lateral 
  view 
  of 
  skeleton 
  of 
  the 
  aedeagus 
  of 
  Strangalia 
  

  

  armata, 
  with 
  internal 
  sac 
  partly 
  evaginated. 
  

  

  6. 
  Ventral 
  view 
  of 
  ninth 
  abdominal 
  segment 
  of 
  S. 
  armata. 
  

  

  7. 
  Eighth 
  and 
  ninth 
  stemites 
  of 
  8. 
  armata, 
  with 
  muscles 
  

  

  attached. 
  

  

  8. 
  As 
  fig. 
  5, 
  but 
  with 
  the 
  muscles. 
  

  

  an. 
  Anus. 
  

  

  ej. 
  Ejaculatory 
  duct. 
  

  

  fo. 
  Functional 
  orifice. 
  

  

  iml. 
  Membrane 
  between 
  tegmen 
  and 
  body 
  wall. 
  

  

  im 
  S. 
  Membrane 
  between 
  tegmen 
  and 
  median 
  lobe, 
  

  

  Isp. 
  Lesser 
  spiculum. 
  

  

  ml. 
  Median 
  lobe. 
  

  

  TOO. 
  Median 
  orifice. 
  

  

  ms. 
  .Struts 
  of 
  median 
  lobe. 
  

  

  pig. 
  Pseudfi 
  tegmen. 
  

  

  sp. 
  Spiculum. 
  

  

  tgs. 
  Tegminal 
  strut. 
  

  

  tr. 
  Tegminal 
  ring. 
  

  

  8. 
  Eighth 
  tergite. 
  

  

  9. 
  Ninth 
  tergite. 
  

   vin. 
  Eighth 
  stemite. 
  

   IX. 
  Ninth 
  sternite. 
  

  

  a. 
  Retractor 
  and 
  protractor 
  muscles 
  of 
  pseudotegmen. 
  

  

  