﻿34 
  PK0CEED1NGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  67 
  

  

  Genus 
  DELIASTES 
  Dohrn. 
  

  

  Deliastes 
  Dohrn, 
  A. 
  Nachtriige, 
  1863, 
  pp. 
  75-76 
  [Monobasic, 
  D. 
  reticulatus, 
  

   new 
  species, 
  genotype, 
  p. 
  76]. 
  

  

  This 
  genus 
  differs 
  from 
  any 
  known 
  to 
  us 
  in 
  having 
  the 
  fore 
  tarsi 
  

   heavily 
  chitinized, 
  bare 
  above, 
  and 
  with 
  but 
  one 
  oblique 
  suture; 
  the 
  

   claws 
  are 
  unequal 
  in 
  size. 
  The 
  fore 
  femur 
  is 
  spined 
  from 
  near 
  base 
  

   to 
  apex, 
  the 
  basal 
  spine 
  longest 
  ; 
  and 
  the 
  fore 
  tibia 
  has 
  a 
  series 
  of 
  

   setulae 
  along 
  the 
  ventral 
  surface 
  which 
  are 
  stout 
  at 
  bases 
  and 
  are 
  

   bent 
  at 
  right 
  angles 
  at 
  middle, 
  their 
  apices 
  directed 
  toward 
  apex 
  of 
  

   tibia. 
  Second 
  antennal 
  segment 
  slightly 
  longer 
  than 
  first 
  (13 
  :12), 
  

   third 
  very 
  short 
  (0.75). 
  Prothorax 
  bilobate, 
  in 
  the 
  winged 
  forms 
  the 
  

   posterior 
  lobe 
  extending 
  to 
  bases 
  of 
  wings. 
  Mesonotum 
  and 
  meta- 
  

   notum 
  unspined: 
  abdomen 
  normal. 
  Venation 
  of 
  fore 
  wing 
  as 
  in 
  

   figure 
  34 
  ; 
  posterior 
  discal 
  cell 
  with 
  a 
  nearly 
  percurrent 
  median 
  longi- 
  

   tudinal 
  fold, 
  simulating 
  a 
  vein. 
  

  

  The 
  female 
  of 
  the 
  genotype 
  is 
  wingless, 
  and. 
  like 
  all 
  apterous 
  

   forms 
  of 
  Ploiariinae 
  known 
  to 
  us, 
  has 
  the 
  prothorax 
  without 
  

   a 
  backwardly 
  projecting 
  flap 
  overlying 
  the 
  dorsum 
  of 
  mesothorax. 
  

   The 
  abdomen 
  is 
  much 
  broader 
  than 
  in 
  male 
  and 
  with 
  tergites 
  4-7 
  

   tuberculate 
  posteriorly. 
  

  

  Through 
  the 
  kindness 
  of 
  Dr. 
  M. 
  S. 
  Pennington, 
  of 
  Buenos 
  Aires, 
  

   we 
  have 
  received 
  a 
  specimen 
  of 
  Deliastes 
  bmchmanni 
  Berg 
  compared 
  

   by 
  him 
  with 
  the 
  type. 
  Study 
  of 
  this 
  specimen 
  in 
  connection 
  with 
  the 
  

   descriptions 
  of 
  Dohrn 
  and 
  Berg 
  emboldens 
  us 
  to 
  identify 
  the 
  genus 
  

   which 
  we 
  had 
  previously 
  failed 
  to 
  do 
  and 
  to 
  synonymize 
  Berg's 
  

   species 
  with 
  reticulatus 
  Dohrn. 
  There 
  is 
  a 
  possibility 
  of 
  error 
  here 
  

   as 
  Dohrn 
  ? 
  s 
  description 
  calls 
  for 
  reticulate 
  venation 
  of 
  the 
  hemelytra; 
  

   however, 
  because 
  of 
  the 
  agreement 
  of 
  our 
  specimens 
  with 
  the 
  descrip- 
  

   tion 
  in 
  every 
  other 
  respect, 
  we 
  conclude 
  that 
  the 
  " 
  whitish 
  veins 
  " 
  

   mentioned 
  are 
  only 
  color 
  markings, 
  not 
  true 
  veins. 
  Since 
  Dohrn 
  

   cites 
  these 
  " 
  veins 
  " 
  as 
  the 
  principal 
  distinction 
  of 
  Deliastes 
  from 
  

   Palacus 
  it 
  is 
  probable 
  that 
  these 
  are 
  really 
  only 
  one 
  genus. 
  If 
  this 
  

   presumption 
  is 
  verified 
  upon 
  appeal 
  to 
  the 
  types, 
  the 
  name 
  Palacus 
  

   will 
  have 
  the 
  preference 
  due 
  to 
  page 
  priority. 
  

  

  KEY 
  TO 
  THE 
  srECIES. 
  

  

  1. 
  Mid 
  and 
  hind 
  femora 
  dark 
  brown 
  or 
  fuscous, 
  each 
  with 
  two 
  narrow 
  strami- 
  

   neous 
  annuli, 
  one 
  at 
  one 
  third 
  of 
  the 
  length 
  from 
  apex 
  and 
  the 
  other 
  

   close 
  to 
  apex; 
  mid 
  and 
  hind 
  tibiae 
  paler 
  than 
  femora, 
  especially 
  api- 
  

   eally, 
  a 
  narrow 
  band 
  of 
  fuscous 
  marking 
  off 
  a 
  pale 
  band 
  near 
  base: 
  

   antennae 
  brown, 
  with 
  a 
  narrow 
  stramineous 
  band 
  near 
  apex 
  and 
  

  

  another 
  near 
  base 
  of 
  first 
  segment 
  reticulatus 
  Dohrn. 
  

  

  Mid 
  and 
  hind 
  femora 
  and 
  tibiae, 
  pale 
  stramineous, 
  each 
  hind 
  femur 
  with 
  a 
  

   small 
  dark 
  brown 
  mark 
  above 
  at 
  apex, 
  the 
  tibiae 
  with 
  a 
  similar 
  mark 
  

   at 
  base, 
  mid 
  femora 
  with 
  2 
  brown 
  marks 
  on 
  posterior 
  side 
  of 
  apical 
  

   half, 
  mid 
  tibiae 
  with 
  a 
  narrow 
  dark 
  brown 
  annulus 
  near 
  base; 
  antennae 
  

   pale 
  stramineous, 
  narrowly 
  dark 
  brown 
  at 
  bases 
  and 
  apices 
  of 
  first 
  and 
  

   second 
  segments 
  stramineipes, 
  new 
  species. 
  

  

  