﻿art. 
  1 
  AMERICAN 
  PLOIARIINAE 
  McATEE 
  AND 
  MALLOCH 
  127 
  

  

  of 
  mid 
  and 
  hind 
  coxae, 
  first 
  termite, 
  series 
  of 
  blotches 
  practically 
  

   forming 
  a 
  ring 
  about 
  abdomen 
  at 
  front 
  of 
  fourth 
  segment, 
  and 
  simi- 
  

   lar 
  patches 
  or 
  indications 
  of 
  them 
  on 
  following 
  two 
  segments. 
  Ab- 
  

   domen 
  widest 
  about 
  middle 
  of 
  fifth 
  segment, 
  holding 
  its 
  width 
  well 
  

   posteriorly, 
  but 
  narrowed 
  considerably 
  anteriorly 
  especially 
  segment 
  

   2; 
  a 
  slight 
  elevation 
  on 
  the 
  ampliate 
  posterior 
  angle 
  of 
  each 
  tergite, 
  

   and 
  on 
  middle 
  of 
  hind 
  margin 
  of 
  sixth; 
  median 
  strip 
  of 
  dorsum 
  

   with 
  a 
  series 
  of 
  squarish 
  depressions; 
  seventh 
  tergite 
  obsoletely 
  

   ridged, 
  wrinkled 
  transversely 
  on 
  posterior 
  half, 
  narrowed 
  in 
  round- 
  

   ing 
  fashion 
  then 
  abruptly 
  apiculate, 
  apex 
  projecting 
  slightly 
  beyond 
  

   hypopygium. 
  Sternites 
  of 
  ordinary 
  shape, 
  seventh 
  shallowly 
  emargi- 
  

   nate 
  medianly, 
  nearly 
  straight 
  laterally, 
  eighth 
  well 
  exposed 
  and 
  

   broadly 
  convex 
  medianly, 
  retreating 
  laterally 
  but 
  not 
  covered 
  by 
  

   seventh, 
  spiracle 
  moderately 
  pedunculate 
  ; 
  ninth 
  sternite 
  rather 
  long, 
  

   opening 
  upward; 
  claspers 
  oblong, 
  not 
  narrowed 
  apically. 
  Fore 
  leg 
  

   and 
  its 
  armature 
  as 
  in 
  figures 
  215, 
  216. 
  

  

  Length, 
  21-22 
  mm. 
  

  

  Holotype. 
  — 
  Male, 
  French 
  Guiana 
  [Coll. 
  Bergroth]. 
  Other 
  male 
  

   specimens: 
  Bourdon 
  ville, 
  French 
  Guiana, 
  R. 
  Benoist, 
  August, 
  1914; 
  

   Lunier 
  River, 
  Tumac 
  Humac 
  Mts., 
  French 
  Guiana, 
  1898, 
  F. 
  Geay; 
  

   Napo 
  River, 
  Upper 
  Amazon, 
  1899, 
  Sarkady 
  (Paris 
  Mus.). 
  

  

  This 
  series 
  shows 
  considerable 
  variation 
  in 
  the 
  extent 
  of 
  the 
  

   patches 
  of 
  golden 
  hair, 
  and 
  some 
  in 
  thickness 
  of 
  claspers, 
  but 
  these 
  

   are 
  not 
  regarded 
  as 
  of 
  taxonomic 
  import. 
  

  

  We 
  are 
  accepting 
  the 
  female 
  (allotype 
  from 
  French 
  Guiana, 
  ex- 
  

   amined 
  by 
  us) 
  assigned 
  to 
  this 
  species 
  by 
  Bergroth. 
  His 
  specimens 
  

   of 
  this 
  sex 
  apparently 
  were 
  collected 
  at 
  the 
  same 
  time 
  and 
  place 
  as 
  

   the 
  males 
  and 
  probably 
  are 
  of 
  the 
  same 
  species. 
  However, 
  among 
  

   the 
  three 
  species 
  of 
  females 
  of 
  this 
  group 
  we 
  have 
  examined, 
  one 
  (f/la- 
  

   brata) 
  agrees 
  better 
  in 
  structural 
  characters 
  with 
  the 
  male 
  insidia- 
  

   trix 
  than 
  does 
  the 
  specimen 
  from 
  Bergroth's 
  collection. 
  All 
  of 
  the 
  

   females 
  differ 
  considerably 
  from 
  the 
  male 
  in 
  characters 
  other 
  than 
  

   those 
  used 
  in 
  defining 
  the 
  subgenus. 
  The 
  frontal 
  spine 
  is 
  much 
  

   blunter, 
  there 
  are 
  no 
  patches 
  of 
  golden 
  hair, 
  and 
  the 
  leg 
  markings 
  

   are 
  much 
  fainter. 
  

  

  The 
  allotype 
  from 
  Bergroth 
  collection 
  is 
  pale 
  castaneous, 
  with 
  the 
  

   head 
  and 
  thorax 
  almost 
  free 
  from 
  granulations. 
  The 
  hypopygium 
  

   is 
  as 
  described 
  in 
  key; 
  the 
  following 
  details 
  may 
  be 
  added: 
  There 
  

   is 
  no 
  longitudinal 
  carina 
  in 
  the 
  depression 
  of 
  tergite 
  8 
  ; 
  and 
  the 
  apical 
  

   margin 
  of 
  tergite 
  9 
  has 
  on 
  each 
  side 
  two 
  ridges 
  which 
  are 
  confluent 
  

   medianly. 
  Length, 
  25 
  mm. 
  

  

  GHILIANELLA 
  (PLOEODONYX) 
  AMICULA, 
  new 
  species. 
  

  

  Female. 
  — 
  Description 
  in 
  most 
  particulars 
  would 
  read 
  like 
  that 
  of 
  

   insidiatrix, 
  from 
  which 
  the 
  present 
  species 
  differs 
  chiefly 
  by 
  hypo- 
  

  

  