﻿PROCEEDINGS 
  OF 
  THE 
  b'NITED 
  STATES 
  NATIONAL 
  MUSEUM 
  

  

  issued 
  

  

  SMITHSONIAN 
  INSTITUTION 
  

  

  U. 
  S. 
  NATIONAL 
  MUSEUM 
  

   VoL 
  % 
  Wuhington: 
  1946 
  No. 
  3200 
  

  

  EIGHT 
  NEW 
  SPECIES 
  OF 
  CHALCID-FLIES 
  OF 
  THE 
  GE^^US 
  

   PSEUDAPHYCUS 
  CLAUSEN, 
  WITH 
  A 
  KEY 
  TO 
  THE 
  

   SPECIES 
  

  

  By 
  A. 
  B. 
  Gahan 
  

  

  The 
  species 
  of 
  chalcid-flies 
  of 
  tlie 
  genus 
  Psevdaphycus 
  Clausen 
  

   (family 
  Encyrtidae) 
  are 
  apparently 
  all 
  parasites 
  of 
  pseudococcine 
  

   scale 
  insects, 
  and 
  some 
  of 
  the 
  species 
  are 
  known 
  to 
  be 
  of 
  considerable 
  

   economic 
  importance 
  through 
  the 
  control 
  they 
  exercise 
  over 
  their 
  

   hosts. 
  P. 
  utilis 
  Timberlake 
  is 
  credited 
  with 
  having 
  all 
  but 
  exter- 
  

   minated 
  Pseudococciis 
  nipae 
  (Maskell) 
  in 
  Hawaii, 
  and 
  the 
  new 
  species 
  

   malinius 
  (described 
  on 
  a 
  subsequent 
  page 
  of 
  this 
  paper), 
  which 
  was 
  

   introduced 
  into 
  the 
  eastern 
  United 
  States 
  from 
  Japan 
  to 
  combat 
  

   Pncudoroccu.<i 
  cowHtocki 
  (Kuwana), 
  apparently 
  gives 
  promise 
  of 
  

   bringing 
  that 
  serious 
  orchard 
  pest 
  under 
  control. 
  

  

  Tlie 
  genus 
  is 
  widely 
  distributed. 
  Species 
  are 
  now 
  known 
  to 
  occur 
  in 
  

   Austria, 
  Spain, 
  Canary 
  Islands, 
  Cuba, 
  Puerto 
  Kico, 
  the 
  United 
  States 
  

   from 
  New 
  Jersey 
  to 
  California, 
  Hawaii, 
  Korea 
  (Cho.sen), 
  and 
  Japan. 
  

  

  PypAidaphyffUA 
  belongs 
  to 
  the 
  group 
  of 
  genera 
  related 
  to 
  Aphycus 
  

   Mayr. 
  It 
  may 
  be 
  distinguished 
  from 
  Aphycus 
  as 
  well 
  as 
  most 
  of 
  the 
  

   other 
  related 
  genera 
  by 
  the 
  fact 
  that 
  it 
  has 
  only 
  live, 
  instead 
  of 
  six, 
  

   segments 
  in 
  the 
  antennal 
  funicle. 
  It 
  is 
  most 
  closely 
  related 
  io 
  Both- 
  

   ri^orcwra 
  Timberlake 
  and 
  A<-e,ropha(ni.f< 
  Smith, 
  both 
  of 
  which 
  have 
  

   the 
  funicle 
  5-s('grnented. 
  It 
  may 
  be 
  separated 
  from 
  linthriocrarra 
  

   by 
  the 
  dull 
  sculpture 
  of 
  its 
  frontovertex 
  and 
  tlioraric 
  dorsum 
  and 
  

   by 
  the 
  fact 
  that 
  it 
  is 
  never 
  shining 
  black 
  in 
  color. 
  As 
  pointed 
  out 
  by 
  

   Mercet 
  (liull. 
  Knt. 
  Kes., 
  vol. 
  2H, 
  p. 
  ;H7, 
  1!»;57), 
  the 
  dillerences 
  between 
  

   Pftetidaphycus 
  and 
  AcerophnguJi 
  are 
  very 
  slight. 
  About 
  the 
  only 
  real 
  

   differences 
  seem 
  to 
  l)e 
  that 
  in 
  Arerophng'>t-f( 
  the 
  front(»vertox 
  is 
  less 
  than 
  

  

  311 
  

  

  705901— 
  4e 
  

  

  