﻿472 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Body 
  slender, 
  smooth 
  ; 
  colors 
  brown 
  and 
  green, 
  in 
  a 
  pattern 
  of 
  longi- 
  

   tudinal 
  streaks, 
  well 
  adapted 
  to 
  concealment 
  among 
  plant 
  stems, 
  the 
  

   depth 
  of 
  the 
  color 
  varying 
  to 
  suit 
  the 
  environment. 
  

  

  Head 
  strongly 
  depressed, 
  with 
  the 
  eyes 
  covering 
  the 
  greater 
  part 
  of 
  the 
  

   sides 
  of 
  it; 
  labium 
  very 
  long, 
  reaching 
  posteriorly 
  the 
  base 
  of 
  the 
  hind 
  

   legs; 
  the 
  mentum 
  regularly 
  widened 
  from 
  base 
  to 
  apex, 
  produced 
  median 
  

   lobe 
  with 
  a 
  closed 
  median 
  cleft 
  ; 
  lateral 
  lobe 
  suddenly 
  rounded 
  off 
  at 
  end 
  

   to 
  the 
  incurved 
  internal 
  end 
  hook, 
  but 
  hardly 
  truncate; 
  legs 
  long 
  and 
  

   slender 
  as 
  befits 
  its 
  climbing 
  habits, 
  tibiae 
  and 
  femora 
  faintly 
  ringed 
  with 
  

   brown 
  ; 
  abdomen 
  with 
  strong 
  and 
  evident 
  lateral 
  spines 
  on 
  segments 
  7-9 
  

   only 
  ; 
  superior 
  abdominal 
  appendage 
  with 
  a 
  well 
  rounded 
  apical 
  notch, 
  

   its 
  length 
  about 
  seven 
  eighths 
  that 
  of 
  the 
  inferiors, 
  which 
  are 
  longer 
  than 
  

   segments 
  9 
  and 
  10 
  together; 
  lateral 
  appendages 
  two 
  fifths 
  as 
  long 
  as 
  the 
  

   inferiors; 
  spines 
  of 
  the 
  ninth 
  segment 
  about 
  as 
  long 
  as 
  the 
  loth 
  seg- 
  

   ment. 
  

  

  Subfamily 
  f^etalurinae: 
  

  

  There 
  is 
  but 
  one 
  genus 
  and 
  species 
  occurring 
  in 
  the 
  eastern 
  Utiited 
  

   States 
  : 
  both 
  will 
  be 
  recognized 
  by 
  the 
  characters 
  given 
  in 
  the 
  table 
  for 
  

   major 
  groups. 
  

  

  Tachopteryx 
  thoreyi 
  Selys 
  

  

  1857 
  Uropetala 
  thoreyi 
  Selys, 
  Monographie 
  des 
  goniphines, 
  p. 
  373 
  ( 
  ^ 
  ) 
  

   1861 
  Petalura 
  thoreyi 
  Hagen, 
  Synopsis 
  Neur. 
  N. 
  Am. 
  p. 
  117 
  

   1878 
  Tachopteryx 
  thoreyi 
  Selys, 
  Acad. 
  Belg. 
  (2) 
  Bui. 
  46:696 
  (? 
  ) 
  

   1893 
  Tachopteryx 
  thoreyi 
  Calvert, 
  Am. 
  ent. 
  soc. 
  Trans. 
  20:241 
  (descrip- 
  

   tion) 
  

   1900 
  Tachopteryx 
  th 
  or 
  eyi 
  Williamson, 
  Ent. 
  news, 
  11:398-99 
  (habits) 
  

   1900 
  Tachopteryx 
  thorey 
  i 
  Wilhamson, 
  Dragon 
  flies 
  Ind. 
  p. 
  281 
  (descrip- 
  

   tion) 
  

  

  This 
  species, 
  originally 
  described 
  from 
  a 
  single 
  male 
  specimen 
  taken 
  

   in 
  the 
  vicinity 
  of 
  New 
  York, 
  has 
  apparently 
  not 
  been 
  found 
  in 
  the 
  state 
  

   since 
  that 
  time. 
  It 
  is 
  now 
  known 
  to 
  be 
  distributed 
  from 
  Massachusetts 
  

   to 
  Florida 
  and 
  Texas. 
  According 
  to 
  Mr 
  Wilhamson, 
  who 
  has 
  published 
  

   the 
  Htde 
  that 
  is 
  known 
  concerning 
  its 
  habits, 
  it 
  flies 
  in 
  Pennsylvania 
  

   during 
  the 
  whole 
  of 
  June 
  and 
  the 
  first 
  half 
  of 
  July. 
  It 
  is 
  ^'usually 
  

   observed 
  resting 
  in 
  sunny 
  situations 
  on 
  fences 
  or 
  trees, 
  at 
  the 
  edges 
  of 
  

   woodland 
  . 
  . 
  . 
  stream 
  and 
  small 
  marshy 
  area 
  near 
  . 
  . 
  . 
  Easily 
  approached 
  

   . 
  . 
  . 
  once 
  aroused, 
  its 
  flight 
  is 
  swift 
  and 
  strong." 
  

  

  On 
  June 
  4, 
  1900 
  D. 
  A. 
  Atkinson 
  took 
  in 
  transformation 
  a 
  single 
  female 
  

   nymph 
  of 
  this 
  species 
  near 
  Pittsburg 
  Pa. 
  E. 
  B. 
  Wilhamson 
  described 
  

   and 
  figured 
  this 
  nymph 
  in 
  Entomological 
  news. 
  1901. 
  12 
  : 
  1-3, 
  pi 
  i, 
  

   and 
  then 
  very 
  kindly 
  loaned 
  me 
  the 
  specimen 
  for 
  study. 
  From 
  this 
  

   specimen 
  I 
  have 
  drawn 
  the 
  labium 
  and 
  antenna 
  shown 
  in 
  figure 
  15 
  and 
  

   the 
  brief 
  statement 
  of 
  characters 
  given 
  herewith. 
  

  

  Nymph. 
  Length 
  38 
  mm. 
  

  

  Antennae 
  7-jointed, 
  depressed, 
  hairy 
  on 
  lateral 
  margins, 
  the 
  segments 
  

   short 
  and 
  broad. 
  

  

  