﻿art. 
  1 
  AMERICAN 
  PLOIARIINAE 
  McATEE 
  AND 
  MALLOCH 
  75 
  

  

  subsequently 
  called 
  Westermannias 
  the 
  latter 
  name 
  therefore 
  falls 
  

   into 
  synonymy, 
  and 
  the 
  insects 
  formely 
  known 
  as 
  Emesa 
  are 
  left 
  

   without 
  a 
  distinctive 
  name. 
  See 
  fuller 
  data 
  under 
  the 
  name 
  Emesa 
  

   as 
  accepted 
  in 
  this 
  paper 
  (p. 
  38). 
  

  

  Genotype. 
  — 
  Ploiaria 
  brevipemnis 
  Say. 
  For 
  full 
  reference 
  see 
  

   under 
  Erne 
  say 
  a 
  brevipennis 
  Say 
  (p. 
  78). 
  This 
  new 
  name 
  is 
  intended 
  

   to 
  combine 
  a 
  reminder 
  of 
  the 
  long 
  familiar 
  term 
  with 
  a 
  tribute 
  to 
  

   the 
  pioneer 
  American 
  naturalist 
  Thomas 
  Say. 
  

  

  Characters 
  of 
  the 
  genus 
  besides 
  those 
  mentioned 
  in 
  the 
  key 
  to 
  

   genera 
  are 
  : 
  Mid 
  and 
  hind 
  legs 
  and 
  antennae 
  longer 
  than 
  body 
  ; 
  head 
  

   without 
  frontal 
  spine, 
  the 
  transverse 
  sulcus 
  convex 
  posteriorly, 
  its 
  

   ends 
  in 
  front 
  of 
  eyes, 
  its 
  middle 
  course 
  between 
  them; 
  prothorax 
  in 
  

   unwinged 
  forms 
  somewhat 
  shorter 
  than 
  meso- 
  and 
  meta-thoraces 
  

   together, 
  in 
  winged 
  forms 
  decidedly 
  longer, 
  expanded 
  posteriorly 
  

   and 
  entirely 
  covering 
  dorsum 
  of 
  mesothorax, 
  its 
  hind 
  margin 
  more 
  

   or 
  less 
  concave 
  medianly; 
  wings 
  extending 
  only 
  to 
  about 
  middle 
  of 
  

   abdomen; 
  sutures 
  between 
  tergites 
  difficult 
  to 
  distinguish, 
  those 
  

   seen 
  are 
  straight; 
  sixth 
  tergite 
  of 
  male 
  ending 
  in 
  a 
  long 
  apically 
  

   rounded 
  flap 
  covering 
  hypopygium 
  ; 
  sutures 
  between 
  sternites 
  convex 
  

   anteriorly, 
  that 
  between 
  o 
  and 
  6 
  most 
  so; 
  hypopygium 
  of 
  male 
  long, 
  

   somewhat 
  compressed, 
  hind 
  margin 
  with 
  a 
  median 
  process; 
  in 
  fe- 
  

   males 
  the 
  seventh 
  tergite 
  is 
  approximately 
  semi-circular 
  in 
  outline, 
  

   the 
  eighth 
  is 
  oblong, 
  somewhat 
  tapering 
  apically, 
  with 
  the 
  apex 
  vari- 
  

   ously 
  modified, 
  yielding 
  the 
  most 
  valuable 
  characters 
  for 
  the 
  separa- 
  

   tion 
  of 
  species; 
  the 
  connexivum 
  is 
  more 
  elevated 
  in 
  females 
  than 
  in 
  

   males. 
  Structure 
  of 
  fore 
  tibia 
  and 
  tarsus 
  and 
  venation 
  of 
  wings 
  as 
  

   in 
  figures 
  136, 
  137, 
  and 
  138, 
  respectively. 
  

  

  Coloration 
  in 
  the 
  genus 
  is 
  simple, 
  the 
  general 
  tone 
  varying 
  from 
  

   stramineous 
  to 
  reddish 
  (erythrization 
  being 
  especially 
  characteristic 
  

   of 
  maturity) 
  ; 
  the 
  whole 
  head 
  and 
  body 
  has 
  a 
  fine 
  short 
  sericeous 
  

   pubescence, 
  bare 
  spots 
  and 
  lines 
  in 
  which 
  account 
  for 
  most 
  of 
  the 
  

   apparent 
  markings, 
  as 
  a 
  line 
  over 
  anterior 
  half 
  of 
  pronotum 
  and 
  

   head, 
  forked 
  in 
  front 
  of 
  transverse 
  constriction, 
  a 
  straight 
  line 
  under 
  

   each 
  eye, 
  cirrhose 
  maculations 
  on 
  pronotum, 
  and 
  dotting 
  over 
  both 
  

   upper 
  and 
  lower 
  surfaces 
  of 
  abdomen; 
  the 
  mesosternum 
  and 
  meso- 
  

   pleura 
  are 
  entirely 
  sericeous, 
  not 
  glossy 
  as 
  in 
  Gardena. 
  The 
  front 
  

   legs 
  are 
  more 
  or 
  less 
  dark 
  spotted 
  and 
  the 
  spines 
  dark-tipped; 
  at 
  

   least 
  the 
  knees 
  (femora-tibial 
  joints) 
  of 
  mid 
  and 
  hind 
  legs 
  are 
  pale, 
  

   often 
  there 
  is 
  another 
  distinct 
  pale 
  band 
  each 
  side 
  of 
  this 
  joint. 
  

   When 
  the 
  antennae 
  are 
  not 
  entirely 
  pale 
  the 
  first 
  segment 
  is 
  pale 
  

   apically. 
  The 
  wings 
  vary 
  from 
  stramineous 
  to 
  fuscous-hyaline, 
  

   often 
  paler 
  at 
  base. 
  

  

  