﻿4i6 
  

  

  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Leuctra 
  tenella 
  Provancher 
  (pi. 
  15 
  and 
  fig. 
  4 
  and 
  5) 
  

  

  1878 
  Leuetra 
  tenella 
  Provancher, 
  Petite 
  faune 
  entomologique 
  du 
  Canada, 
  

  

  p. 
  802 
  (without 
  description) 
  

   1892 
  Leuctra 
  tenella, 
  N. 
  Banks, 
  Am. 
  ent. 
  see. 
  Trans. 
  19 
  : 
  343 
  (cited) 
  

  

  This 
  species 
  was 
  much 
  less 
  common 
  than 
  the 
  preceding 
  one. 
  Adults 
  

   were 
  not 
  observed 
  in 
  flight. 
  A 
  few 
  were 
  taken 
  in 
  the 
  following 
  places 
  : 
  

   at 
  the 
  hatchery 
  windows; 
  on 
  aquatic 
  vegetation 
  close 
  above 
  the 
  

   surface 
  of 
  the 
  water 
  ; 
  and 
  under 
  the 
  ends 
  of 
  some 
  boards 
  which 
  over- 
  

   hung 
  the 
  water 
  at 
  the 
  railway 
  embankment, 
  where 
  the 
  water 
  pours 
  

   out 
  of 
  the 
  culvert, 
  forming 
  a 
  little 
  riffle. 
  In 
  this 
  last 
  mentioned 
  place 
  

   the 
  nymphs 
  were 
  obtained. 
  They 
  were 
  found 
  crawling 
  over 
  the 
  surfaces 
  

   of 
  the 
  stones 
  and 
  boards 
  among 
  the 
  brown 
  and 
  empty 
  cases 
  of 
  Simulium 
  

   pupae. 
  One 
  was 
  bred 
  July 
  31. 
  Sweepings 
  by 
  day 
  alongside 
  the 
  creek 
  

   and 
  trap 
  lanterns 
  by 
  night 
  failed 
  to 
  find 
  this 
  species. 
  

  

  From 
  the 
  foregoing 
  bibliographic 
  notes 
  it 
  will 
  be 
  apparent 
  that 
  this 
  

   species 
  is 
  still 
  practically 
  undescribed. 
  

  

  Fig. 
  4 
  Leuctra 
  tenella, 
  male 
  :_a, 
  dorsal 
  view 
  of 
  head 
  and 
  prothorax 
  ; 
  b, 
  end 
  of 
  male 
  abdomen 
  

  

  Imago. 
  Length, 
  male 
  7,5 
  mm, 
  female 
  9 
  mm 
  to 
  tip 
  of 
  wings; 
  anten- 
  

   nae, 
  5 
  mm. 
  First 
  and 
  fourth 
  segments 
  of 
  antennae 
  of 
  about 
  equal 
  

   length, 
  the 
  third 
  longer, 
  the 
  second 
  shorter, 
  about 
  34 
  segments 
  in 
  all; 
  

  

  