﻿NEARCTIC 
  PERISCELIDAE 
  — 
  STURTEVANT 
  553 
  

  

  The 
  European 
  species 
  of 
  Periscelis 
  are 
  known 
  to 
  be 
  most 
  often 
  

   found 
  about 
  the 
  sap 
  of 
  bleeding 
  trees 
  (see, 
  for 
  example, 
  Oldenberg, 
  

   1914), 
  and 
  the 
  South 
  American 
  P. 
  nebulosa 
  was 
  also 
  taken 
  on 
  a 
  bleed- 
  

   ing 
  tree. 
  All 
  three 
  of 
  the 
  Nearctic 
  species 
  are 
  to 
  be 
  found 
  in 
  the 
  same 
  

   situations 
  — 
  most 
  often 
  on 
  oak 
  trees 
  east 
  of 
  the 
  Mississippi 
  River, 
  on 
  

   cottonwoods 
  west 
  of 
  it. 
  I 
  have 
  reared 
  P. 
  wheeleri 
  from 
  larvae 
  found 
  

   in 
  fermenting 
  oak 
  sap, 
  and 
  there 
  can 
  be 
  little 
  doubt 
  that 
  sap 
  is 
  the 
  

   normal 
  breeding 
  place 
  of 
  all 
  three 
  Nearctic 
  species. 
  

  

  P. 
  annulata 
  has 
  been 
  taken 
  in 
  eastern 
  Massachusetts 
  from 
  June 
  13 
  

   until 
  the 
  end 
  of 
  August, 
  in 
  Missouri 
  in 
  June 
  and 
  July, 
  in 
  South 
  Dakota 
  

   in 
  June, 
  in 
  Nebraska, 
  New 
  Mexico, 
  and 
  Washington 
  in 
  August, 
  in 
  

   Texas 
  in 
  October, 
  and 
  in 
  Alabama 
  on 
  May 
  2. 
  P. 
  wheeleri 
  has 
  been 
  

   taken 
  in 
  Massachusetts 
  from 
  June 
  18 
  to 
  August 
  24; 
  in 
  New 
  Jersey 
  on 
  

   July 
  3; 
  and 
  in 
  California 
  on 
  October 
  24. 
  P. 
  occidentalis 
  has 
  been 
  

   found 
  in 
  California 
  from 
  March 
  25 
  to 
  July 
  30, 
  in 
  Arizona 
  in 
  June 
  and 
  

   July, 
  and 
  in 
  Washington 
  in 
  August. 
  Evidently 
  all 
  three 
  species 
  have 
  

   numerous 
  broods, 
  probably 
  overlapping, 
  and 
  may 
  be 
  found 
  through- 
  

   out 
  the 
  warmer 
  months. 
  

  

  PerisceHs 
  annulata 
  (Fallen), 
  1813 
  

  

  Described 
  from 
  Europe; 
  recorded 
  by 
  Sturtevant 
  (1923) 
  from 
  Ala- 
  

   bama, 
  South 
  Dakota, 
  and 
  New 
  Mexico, 
  and 
  by 
  Malloch 
  (1915) 
  from 
  

   Illinois. 
  From 
  the 
  following 
  locations 
  48 
  specimens 
  were 
  examined: 
  

   Budapest, 
  Hungary 
  (Kertesz); 
  Falmouth, 
  East 
  Falmouth, 
  Woods 
  

   Hole, 
  and 
  Naushon 
  Island, 
  Mass.; 
  Webster 
  Grove, 
  Mo, 
  (H. 
  D. 
  

   Stalker) 
  ; 
  Kushla 
  (Mobile 
  County), 
  Ala.; 
  Austin, 
  Tex. 
  (M. 
  R. 
  Wheeler) 
  ; 
  

   Chadron 
  and 
  Oakdale, 
  Nebr, 
  (M, 
  R. 
  Wheeler) 
  ; 
  Chamberlain, 
  S. 
  Dak.; 
  

   Mogollon, 
  N, 
  Mex. 
  (M. 
  R. 
  Wheeler). 
  Dr. 
  Wheeler 
  informs 
  me 
  that 
  

   he 
  also 
  has 
  collected 
  this 
  species 
  at 
  Verlot, 
  Wash. 
  The 
  specimen 
  from 
  

   Mogollon 
  has 
  the 
  wings 
  clouded 
  on 
  the 
  anterior 
  margin 
  and 
  it 
  may 
  

   represent 
  a 
  distinct 
  form. 
  

  

  The 
  species 
  was 
  described 
  in 
  the 
  ephydrid 
  genus 
  Notiphila 
  and 
  often 
  

   has 
  been 
  placed 
  in 
  the 
  Drosophilidae; 
  I 
  formerly 
  referred 
  it 
  to 
  the 
  

   Agromyzidae, 
  and 
  later 
  to 
  theLonchaeidae; 
  Malloch 
  (1915) 
  has 
  listed 
  

   it 
  under 
  the 
  Sapromyzidae. 
  This 
  species 
  is 
  the 
  genotype 
  of 
  Myodris 
  

   Lioy, 
  of 
  Microperiscelis 
  Oldenberg, 
  and 
  of 
  Aleronychina 
  Enderlein 
  

   (Meronychia 
  Enderlein). 
  It 
  was 
  described 
  by 
  Malloch 
  (1915) 
  as 
  

   Phorticoides 
  jlinti 
  (genus 
  and 
  species 
  both 
  to 
  be 
  included 
  in 
  the 
  

   synonymy). 
  

  

  Periscelis 
  wheeleri 
  (Sturtevant), 
  1923 
  

  

  Type 
  from 
  Naushon 
  Island, 
  Mass. 
  (AMNH), 
  and 
  a 
  paratype 
  from 
  

   the 
  same 
  locahty 
  (USNM). 
  From 
  the 
  following 
  locations 
  24 
  speci- 
  

   mens 
  were 
  examined: 
  Woods 
  Hole 
  and 
  Naushon 
  Island, 
  Mass.; 
  

  

  