﻿30 
  Mr. 
  Cameron 
  on 
  

  

  centre. 
  Pronotum 
  with 
  a 
  slight 
  depression 
  in 
  the 
  middle. 
  

   The 
  sternum, 
  median 
  segment 
  and 
  pleurae 
  sparsely 
  covered 
  

   with 
  long 
  silvery 
  hair. 
  Petiole 
  curved, 
  longer 
  than 
  the 
  

   thorax. 
  Abdomen 
  shining, 
  impunctate, 
  glabrous. 
  Pygidial 
  

   area 
  shining, 
  convex, 
  keeled 
  laterally. 
  Legs 
  covered 
  some- 
  

   what 
  thickly 
  with 
  white, 
  glistening 
  hair. 
  The 
  second 
  cubital 
  

   cellule 
  above 
  (the 
  nervures 
  straight) 
  is 
  a 
  little 
  shorter 
  than 
  

   the 
  space 
  bounded 
  by 
  the 
  first 
  recurrent 
  and 
  second 
  trans- 
  

   verse 
  cubital 
  nervures 
  and 
  less 
  than 
  half 
  the 
  length 
  of 
  the 
  

   third 
  cellule 
  ; 
  the 
  recurrent 
  nervures 
  are 
  received 
  about 
  the 
  

   same 
  distance 
  behind 
  the 
  transverse 
  cubitals. 
  The 
  antennse 
  

   are 
  pale 
  fulvous 
  ; 
  the 
  mandibles 
  at 
  the 
  base 
  pale 
  testaceous, 
  

   black 
  at 
  the 
  apex 
  ; 
  the 
  legs 
  (except 
  the 
  coxas) 
  pale 
  ferru- 
  

   ginous 
  ; 
  the 
  posterior 
  femora 
  and 
  tibia; 
  a 
  little 
  infuscated 
  ; 
  

   abdomen 
  piceo-ferrugineous, 
  infuscated 
  in 
  the 
  middle. 
  

  

  Psen 
  erraticns, 
  Smith 
  {Proc. 
  Linn. 
  Soc. 
  IV., 
  p. 
  85), 
  from 
  

   Celebes 
  agrees 
  closely 
  in 
  coloration 
  with 
  the 
  species 
  here 
  

   described 
  ; 
  but 
  no 
  details 
  beyond 
  color 
  are 
  given, 
  and 
  in 
  that 
  

   respect 
  it 
  differs 
  from 
  rufiventris 
  in 
  having 
  the 
  nervures 
  

   and 
  stigma 
  pale 
  ferruginous, 
  not 
  deep 
  black 
  as 
  in 
  our 
  species. 
  

  

  Hab. 
  Madras 
  {Rothnej). 
  

  

  ^ 
  PSEN 
  CLAVATUS, 
  Sp. 
  nov. 
  

  

  Smaller 
  than 
  P. 
  rufiventris 
  (8 
  mm. 
  onl}-) 
  differing 
  from 
  

   it 
  in 
  the 
  eyes 
  being 
  rounded 
  in 
  front, 
  diverging 
  at 
  apex, 
  in 
  

   the 
  antennae 
  being 
  distinctly 
  clavate 
  ; 
  with 
  the 
  third 
  joint 
  

   not 
  twice 
  the 
  length 
  of 
  the 
  second 
  (in 
  rufiventris 
  it 
  is 
  three 
  

   times) 
  and 
  not 
  much 
  longer 
  than 
  the 
  fourth 
  ; 
  in 
  the 
  third 
  

   joint 
  being 
  nearly 
  twice 
  the 
  length 
  of 
  the 
  penultimate 
  ; 
  in 
  

   there 
  being 
  no 
  furrow 
  behind 
  the 
  ocelli 
  ; 
  in 
  the 
  base 
  of 
  the 
  

   median 
  segment 
  being 
  not 
  depressed, 
  and 
  with 
  three 
  keels 
  

   down 
  the 
  central 
  part, 
  — 
  one 
  central 
  and 
  two 
  lateral 
  keels 
  ; 
  

   the 
  abdomen 
  apart 
  from 
  the 
  black 
  petiole, 
  is 
  entirely 
  rufous; 
  

   the 
  second 
  cubital 
  cellule 
  is 
  narrowed 
  almost 
  to 
  a 
  point 
  at 
  

   the 
  top 
  : 
  the 
  head 
  and 
  thorax 
  are 
  more 
  distinctly 
  aciculate, 
  

  

  