﻿61 
  

  

  Papers. 
  

  

  The 
  following 
  paper 
  was 
  read 
  by 
  the 
  Chairman: 
  

  

  Notes 
  on 
  Hawaiian 
  Wasps, 
  With 
  Descriptions 
  of 
  New 
  Species. 
  

  

  By 
  R. 
  C. 
  L. 
  Perkins, 
  

   (abstract) 
  

   This 
  paper 
  dealt 
  with 
  the 
  habits, 
  economic 
  importance, 
  

   parasites 
  and 
  especially 
  with 
  the 
  colouration 
  of 
  the 
  Hawaiian 
  

   Odynerus. 
  It 
  was 
  shown 
  that 
  the 
  many 
  species 
  formed 
  a 
  num- 
  

   ber 
  of 
  very 
  distinct 
  and 
  definite 
  colour 
  groups 
  and 
  that 
  all 
  the 
  

   phenomena 
  of 
  the 
  so-called 
  "inedible 
  associations" 
  were 
  pre- 
  

   sented 
  by 
  them. 
  The 
  causes 
  supposed 
  to 
  give 
  rise 
  to 
  these 
  

   "inedible 
  associations" 
  were, 
  however, 
  absent 
  in 
  the 
  Hawaiian 
  

   Islands. 
  Three 
  synoptic 
  tables 
  were 
  furnished, 
  one 
  dealing 
  

   with 
  the 
  species 
  frequenting 
  Oahu, 
  being 
  a 
  revision 
  of 
  the 
  table 
  

   published 
  in 
  the 
  Entomologist's 
  Monthly 
  Magazine 
  ("Notes 
  on 
  

   Hawaiian 
  Aculeate 
  Hymenoptera," 
  (2) 
  XII, 
  pp. 
  264-8, 
  Nov., 
  

   1901); 
  a 
  second 
  deals 
  with 
  the 
  species 
  of 
  Maui, 
  Molokai 
  and 
  

   Lanai; 
  and 
  a 
  third 
  with 
  those 
  of 
  Kauai. 
  The 
  species 
  of 
  Hawaii 
  

   were 
  published 
  in 
  the 
  "Transactions 
  of 
  the 
  Entomological 
  

   Society 
  of 
  London" 
  (1902, 
  pp. 
  131-40; 
  "Notes 
  on 
  Hawaiian 
  

   Wasps, 
  with 
  Descriptions 
  of 
  New 
  Species"). 
  Several 
  new 
  

   species 
  were 
  described 
  and 
  some 
  previously 
  named 
  in 
  the 
  dichoto- 
  

   mous 
  table 
  of 
  Oahuan 
  species, 
  above 
  mentioned, 
  were 
  now 
  more 
  

   fully 
  described. 
  

  

  1 
  (4 
  

  

  2 
  (3 
  

  

  3 
  (2 
  

  

  4 
  (1 
  

  

  5 
  (10 
  

  

  6 
  (7 
  

  

  7 
  (6 
  

  

  8 
  (9 
  

  

  9 
  (8 
  

  

  (i) 
  SYNOPSIS 
  OF 
  OAHUAN 
  ODYNERUS. 
  

  

  Dorsal 
  and 
  posterior 
  faces 
  of 
  the 
  post-scutelluni 
  sharply 
  defined 
  

  

  by 
  a 
  serrulate 
  or 
  spinulose 
  ridge 
  (easily 
  seen 
  from 
  in 
  front) 
  ; 
  

   Costae 
  of 
  second 
  ventral 
  segment 
  more 
  or 
  less 
  obsolete. 
  

  

  Odynerus 
  nigripennis. 
  

   Costae 
  of 
  second 
  ventral 
  segment 
  well 
  developed. 
  

  

  O. 
  epipseustes. 
  

   Dorsal 
  and 
  posterior 
  faces 
  of 
  the 
  post-scutellum 
  not 
  divided 
  by 
  

  

  a 
  serrulate 
  or 
  spinulose 
  ridge. 
  

   Intermediate 
  tibiae 
  without 
  a 
  true 
  calcar, 
  at 
  most 
  with 
  some 
  

  

  very 
  short 
  spines 
  at 
  the 
  apex. 
  Nesodynerus. 
  

  

  Second 
  ventral 
  segment 
  with 
  a 
  shallow 
  but 
  evident 
  triangular 
  

  

  impression 
  behind 
  the 
  costae. 
  A'^. 
  optabilis. 
  

  

  Second 
  ventral 
  segment 
  without 
  such 
  an 
  impression. 
  

   Wings 
  with 
  brilliant 
  purple 
  or 
  blue 
  iridescence. 
  A'', 
  rudolphi. 
  

   Wings 
  fuscous 
  without 
  such 
  iridescence. 
  N. 
  oblitus. 
  

  

  