﻿No. 
  1953. 
  REVISION 
  OF 
  FAMILY 
  PTYCHOPTERID^— 
  ALEXANDER. 
  335 
  

  

  brown 
  seam 
  on 
  the 
  two 
  supernumerary 
  cross 
  veins 
  and 
  on 
  m; 
  stigma 
  

   oval, 
  lighter 
  brown. 
  The 
  gray 
  extends 
  as 
  an 
  iiTegular 
  band 
  distad 
  

   of 
  the 
  supernumerary 
  cross 
  veins 
  ; 
  and 
  as 
  an 
  interrupted 
  band 
  prox- 
  

   iniad 
  of 
  the 
  cord 
  ; 
  an 
  isolated 
  spot 
  in 
  the 
  ends 
  of 
  the 
  cells 
  Cui 
  and 
  Cu. 
  

  

  Abdomen. 
  — 
  Tergum 
  light 
  yellowish 
  brown; 
  a 
  narrow 
  brown 
  median 
  

   stripe; 
  caudal 
  edge 
  of 
  the 
  sclerites 
  gray, 
  interrupted 
  medially 
  by 
  the 
  

   brown 
  median 
  line 
  ; 
  lateral 
  edge 
  of 
  the 
  sclerites 
  dark 
  brownish 
  black, 
  

   narrowest 
  caudally; 
  segment 
  eight 
  dark 
  brown; 
  genital 
  segment 
  

   light 
  brown. 
  Sternum 
  light 
  yellowish 
  white, 
  a 
  brown 
  transverse 
  

   sub-basal 
  band; 
  eighth 
  segment 
  dark 
  brown. 
  

  

  I 
  wish 
  to 
  thank 
  Dr. 
  W. 
  A. 
  Riley, 
  of 
  Cornell, 
  for 
  kind 
  assistance 
  

   with 
  this 
  paper. 
  

  

  Holotype. 
  — 
  Latitude 
  Cove, 
  Patagonia; 
  United 
  States 
  Bureau 
  of 
  

   Fisheries; 
  accession 
  No. 
  21999. 
  

  

  Type.— 
  Cd^i. 
  No. 
  14919, 
  U.S.N.M. 
  

  

  