﻿art. 
  1 
  AMERICAN 
  PLOIARIINAE 
  McATEE 
  AND 
  MALLOCH 
  123 
  

  

  GHILIANELLA 
  ATRICLAVA 
  Bergroth. 
  

  

  GMlianella 
  atriclava 
  Bergroth, 
  E. 
  New 
  Neotropical 
  Ploeariinae. 
  Psyche, 
  

   vol. 
  18, 
  No. 
  1, 
  Feb., 
  1911, 
  pp. 
  19-20 
  [French 
  Guiana]. 
  

  

  Body 
  in 
  general 
  yellow-brown, 
  bulbosity 
  and 
  legs 
  piceous, 
  the 
  

   latter 
  practically 
  without 
  pale 
  markings. 
  Frontal 
  spine 
  pale, 
  short, 
  

   decurved. 
  Abdomen 
  long 
  pedicillate, 
  increasing 
  but 
  slightly 
  in 
  

   thickness 
  from 
  base 
  to 
  posterior 
  third 
  of 
  fourth 
  segment 
  which 
  ab- 
  

   ruptly 
  expands 
  and 
  together 
  with 
  the 
  fifth 
  and 
  sixth 
  segments 
  forms 
  

   an 
  almost 
  globular 
  expansion 
  beyond 
  which 
  the 
  short 
  seventh 
  seg- 
  

   ment 
  projects 
  but 
  little. 
  Elevations 
  of 
  fifth 
  tergite 
  large, 
  subacute, 
  

   compressed, 
  longitudinal^ 
  ridged; 
  sixth 
  and 
  seventh 
  tergites 
  very 
  

   short, 
  the 
  latter 
  transversely 
  corrugated 
  on 
  the 
  apical 
  half, 
  which 
  is 
  

   short 
  acuminate; 
  ninth 
  sternite 
  short, 
  opening 
  upwards, 
  the 
  claspers 
  

   oblong, 
  the 
  upper 
  posterior 
  angles 
  truncate. 
  

  

  Length, 
  24 
  mm. 
  

  

  Male, 
  French 
  Guinana 
  (Coll. 
  E. 
  Bergroth). 
  The 
  type. 
  

  

  GHILIANELLA 
  FILIVENTRIS 
  Spinola. 
  

  

  Ghilianella 
  ftUventris 
  Spinola, 
  M. 
  Generi 
  Insetti 
  Artroidignati, 
  1852, 
  pp. 
  

   143, 
  144 
  [Para]. 
  

  

  Dohrn 
  19 
  describes 
  and 
  illustrates 
  a 
  species 
  of 
  Ghilianella 
  as 
  filiven- 
  

   tris 
  Spinola 
  and 
  it 
  is 
  upon 
  this 
  work 
  that 
  the 
  present 
  identification 
  

   is 
  based. 
  Certainly 
  the 
  males 
  before 
  us 
  are 
  the 
  same 
  species 
  that 
  

   Dohrn 
  figured 
  ; 
  discrepancies 
  in 
  color 
  from 
  what 
  he 
  described 
  are 
  not 
  

   a 
  matter 
  for 
  concern 
  in 
  this 
  genus. 
  The 
  specimens 
  agree 
  also 
  with 
  

   Spinola's 
  description 
  and 
  some 
  of 
  them 
  are 
  from 
  the 
  type 
  locality. 
  

   The 
  association 
  of 
  sexes 
  here 
  made 
  is 
  based 
  on 
  examination 
  of 
  a 
  

   series 
  of 
  18 
  specimens 
  from 
  the 
  same 
  locality 
  collected 
  at 
  the 
  same 
  

   season, 
  the 
  genitalia 
  of 
  a 
  number 
  of 
  which 
  show 
  evidences 
  of 
  recent 
  

   use. 
  

  

  Male. 
  — 
  Color 
  chiefly 
  dark 
  reddish 
  (one 
  specimen 
  has 
  peduncle 
  

   yellowish) 
  ; 
  head 
  and 
  thorax 
  copiously 
  granulate; 
  fine, 
  short 
  

   pubescence 
  plentiful 
  on 
  head 
  and 
  thorax, 
  sparse 
  on 
  abdomen 
  and 
  

   legs. 
  Abdomen 
  reaching 
  the 
  greatest 
  degree 
  of 
  pedunculation 
  

   seen 
  in 
  any 
  species, 
  segments 
  2, 
  3, 
  and 
  most 
  of 
  4 
  forming 
  a 
  stalk 
  of 
  

   almost 
  uniform 
  diameter, 
  the 
  apex 
  of 
  fourth 
  segment 
  abruptly 
  ex- 
  

   panded, 
  and 
  together 
  with 
  the 
  fifth 
  and 
  sixth 
  forming 
  a 
  globular 
  

   expansion 
  which 
  on 
  account 
  of 
  the 
  shortness 
  of 
  the 
  seventh 
  segment 
  

   seems 
  almost 
  to 
  terminate 
  the 
  abdomen 
  (fig. 
  201) 
  ; 
  this 
  is 
  the 
  only 
  

   species 
  observed 
  to 
  have 
  ridged 
  prominences 
  near 
  posterior 
  angles 
  

   of 
  the 
  sixth 
  as 
  well 
  as 
  on 
  the 
  fifth 
  tergite; 
  the 
  seventh 
  tergite 
  has 
  

   the 
  basal 
  portion 
  almost 
  square, 
  this 
  tapering 
  rapidly 
  into 
  a 
  short 
  

   more 
  or 
  less 
  upturned 
  apiculation, 
  slightly 
  surpassing 
  the 
  hypopygium 
  

  

  19 
  Emesina, 
  1860. 
  pp. 
  237, 
  238. 
  pi. 
  1, 
  figs. 
  8, 
  10. 
  

  

  