﻿WEEVILS 
  OF 
  THE 
  TRIBE 
  OPHRYASTINI 
  — 
  DAVIS 
  485 
  

  

  up. 
  The 
  tiluloniiiml 
  S('<i:ini'iit 
  dosing 
  the 
  anal 
  aperture 
  was 
  lifted 
  up 
  

   and 
  back, 
  and 
  a 
  linely 
  pointed 
  scalpel 
  made 
  from 
  a 
  needle 
  was 
  in- 
  

   serted. 
  A 
  cut 
  on 
  each 
  side 
  from 
  the 
  vicinity 
  of 
  the 
  posterior 
  coxae, 
  

   the 
  edge 
  of 
  the 
  scalpel 
  pressing 
  against 
  the 
  inner 
  side 
  of 
  the 
  abdominal 
  

   segments 
  and 
  outward 
  against 
  their 
  inturned 
  edges, 
  severed 
  the 
  semi- 
  

   membranous 
  dorsal 
  sclerites. 
  The 
  scalpel 
  was 
  then 
  brought 
  to 
  the 
  

   center, 
  close 
  along 
  the 
  ventral 
  plates 
  and 
  the 
  flat 
  side 
  of 
  the 
  blade 
  

   pressed 
  inward 
  until 
  the 
  internal 
  parts 
  came 
  free 
  of 
  the 
  ventral 
  plates. 
  

   A 
  transverse 
  cut 
  at 
  about 
  the 
  line 
  of 
  the 
  posterior 
  coxae 
  severed 
  the 
  

   hiternal 
  parts 
  completely 
  and 
  the 
  whole 
  viscera 
  posterior 
  to 
  this 
  point 
  

   could 
  then 
  be 
  lifted 
  out. 
  The 
  ventral 
  segments 
  were 
  then 
  replaced, 
  

   no 
  damage 
  being 
  done 
  to 
  the 
  appearance 
  of 
  the 
  specimen 
  in 
  most 
  

   instances. 
  

  

  The 
  internal 
  parts 
  were 
  then 
  dropped 
  into 
  10 
  percent 
  potassium- 
  

   hydroxide 
  solution 
  and 
  left 
  for 
  two 
  hours 
  or 
  more. 
  In 
  species 
  having 
  

   lightly 
  chitinized 
  genitalia, 
  such 
  as 
  Eupagoderes 
  decipiens 
  and 
  Rhigop- 
  

   sis 
  spp., 
  this 
  was 
  sufTicicuit, 
  but 
  heavily 
  chitinized 
  genitalia 
  such 
  as 
  

   those 
  of 
  Eupagoderes 
  desertus 
  required 
  soalcing 
  in 
  the 
  solution 
  for 
  

   some 
  hours, 
  then 
  boiling 
  in 
  it, 
  by 
  which 
  process 
  the 
  specimens 
  were 
  

   not 
  harmed. 
  Having 
  been 
  cleaned 
  and 
  cleared 
  sufliciently, 
  the 
  geni- 
  

   talia 
  were 
  placed 
  in 
  water 
  or 
  acetic 
  acid 
  and 
  examined 
  urder 
  a 
  dis- 
  

   secting 
  binocular. 
  Some 
  were 
  completely 
  dismembered, 
  all 
  parts 
  

   being 
  dissociated 
  for 
  detailed 
  study. 
  Others 
  were 
  preserved 
  com- 
  

   plete. 
  Several 
  hours 
  of 
  soaking 
  in 
  acetic 
  acid 
  alcohol 
  neutralized 
  any 
  

   remaining 
  traces 
  of 
  potassium 
  h3*droxidc, 
  and 
  the 
  genitalia 
  were 
  then 
  

   mounted 
  dry 
  upon 
  points 
  beneath 
  the 
  specimens 
  or 
  were 
  placed 
  in 
  

   niiimte 
  vials 
  of 
  glycerine 
  similarly 
  pimied 
  beneath 
  the 
  specimens. 
  

  

  Drawings 
  were 
  made 
  with 
  a 
  camera 
  lucida, 
  the 
  outlines 
  and 
  principal 
  

   structures 
  being 
  traced 
  and 
  the 
  details 
  filled 
  in 
  lat(;r 
  under 
  a 
  low-power 
  

   binocular. 
  Ir) 
  most 
  cases 
  the 
  setae 
  were 
  left 
  out 
  of 
  the 
  drawings 
  as 
  

   obscuring 
  the 
  detail 
  and 
  serving 
  no 
  useful 
  purpose 
  in 
  Rej)arating 
  the 
  

   species. 
  

  

  The 
  nomenclature 
  of 
  the 
  various 
  parts 
  of 
  the 
  genitalia 
  is 
  more 
  or 
  

   less 
  of 
  a 
  combination. 
  Names 
  that 
  seemed 
  to 
  apply 
  well 
  have 
  been 
  

   adopted 
  where 
  found. 
  Those 
  of 
  the 
  male 
  genitalia 
  are 
  largely 
  from 
  

   Sharp 
  and 
  Muir 
  (1912) 
  and 
  those 
  of 
  the 
  female 
  genitalia 
  partly 
  from 
  

   Tanner 
  (1927) 
  and 
  partly 
  from 
  Dobzhansky 
  (i9.'il). 
  Some 
  names 
  

   hav(! 
  been 
  made 
  up 
  where 
  they 
  could 
  not 
  be 
  found 
  readily 
  in 
  litera- 
  

   ture. 
  Sinc(! 
  the 
  present 
  study 
  is 
  not 
  one 
  of 
  phylogeny 
  or 
  homology, 
  

   but 
  is 
  merely 
  an 
  attempt 
  to 
  distinguish 
  the 
  g(>nera 
  and 
  species 
  of 
  a 
  

   limited 
  grouj), 
  descriptive 
  terms 
  should 
  \n- 
  considereil 
  to 
  nu'an 
  no 
  

   more 
  than 
  convenient 
  words 
  for 
  reference. 
  The 
  following 
  are 
  the 
  

   terms 
  used, 
  with 
  a 
  brief 
  explanation 
  of 
  each 
  (the 
  letters 
  in 
  parentheses 
  

   are 
  those 
  used 
  in 
  fig. 
  49) 
  : 
  

  

  