﻿REPORT 
  OF 
  THE 
  STATE 
  ENTOMOLOGIST 
  339 
  

  

  States 
  that 
  'nearly 
  all 
  occur 
  in 
  Canada. 
  They 
  are 
  widely 
  distributed 
  

   throughout 
  the 
  Dominion 
  from 
  Nova 
  Scotia 
  to 
  Vancouver 
  island, 
  and 
  

   very 
  far 
  northward. 
  The 
  larvae 
  of 
  these 
  insects 
  are 
  borers 
  in 
  coniferous 
  

   trees, 
  and 
  their 
  distribution 
  is 
  probably 
  coextensive 
  with 
  the 
  trees 
  that 
  

   they 
  infest.' 
  

  

  The 
  species 
  named 
  above 
  is 
  the 
  one 
  that 
  more 
  frequently 
  comes 
  under 
  

   observation 
  in 
  the 
  eastern 
  United 
  States, 
  although 
  it 
  is 
  far 
  from 
  common, 
  

   and 
  the 
  male 
  appears 
  to 
  be 
  quite 
  rare. 
  Not 
  a 
  smgle 
  example 
  of 
  the 
  

   male 
  has 
  ever 
  been 
  taken 
  by 
  me 
  or 
  brought 
  to 
  my 
  notice. 
  

  

  An 
  example 
  of 
  the 
  female 
  was 
  received 
  August 
  31, 
  from 
  Carthage, 
  

  

  N. 
  Y., 
  with 
  the 
  following 
  statement 
  : 
  

  

  The 
  inclosed 
  fly 
  was 
  seen 
  a 
  few 
  days 
  ago 
  at 
  a 
  saw 
  mill 
  in 
  Carthage, 
  

   alighting 
  on 
  some 
  freshly 
  sawed 
  spruce 
  lumber, 
  in 
  the 
  face 
  of 
  which 
  it 
  

   presently 
  sank 
  its 
  ovipositor. 
  The 
  instrument 
  was 
  an 
  inch 
  or 
  more 
  long, 
  

   fine 
  as 
  a 
  needle, 
  and 
  went 
  straight 
  from 
  the 
  center 
  of 
  the 
  body 
  into 
  the 
  

   wood, 
  taking 
  six 
  or 
  eight 
  minutes. 
  It 
  seemed 
  operated 
  by 
  a 
  lever 
  move- 
  

   ment 
  of 
  two 
  thicker, 
  shorter 
  arms, 
  and 
  was 
  drawn 
  out 
  by 
  a 
  reverse 
  

   action. 
  

  

  Description 
  and 
  habits. 
  The 
  female 
  may 
  be 
  easily 
  recognized 
  

  

  from 
  the 
  accompanying 
  figure 
  and 
  the 
  description 
  given 
  of 
  it 
  by 
  Dr 
  

  

  Harris 
  as 
  follows 
  : 
  

  

  The 
  white-horned 
  Urocerus 
  has 
  white 
  antennae, 
  longer 
  and 
  more 
  taper- 
  

   ing 
  than 
  those 
  of 
  the 
  pigeon 
  Tremex, 
  and 
  black 
  at 
  each 
  end. 
  The 
  female 
  

   is 
  of 
  a 
  deep 
  blue-black 
  color, 
  with 
  an 
  oval 
  white 
  spot 
  behind 
  each 
  eye, 
  

   and 
  another 
  on 
  each 
  side 
  of 
  the 
  hinder 
  part 
  of 
  the 
  abdomen. 
  The 
  horn 
  

   on 
  the 
  tail 
  is 
  long, 
  and 
  shaped 
  like 
  the 
  head 
  of 
  a 
  lance. 
  The 
  wings 
  are 
  

   smoky 
  brown, 
  and 
  semitransparent. 
  The 
  legs 
  are 
  black, 
  with 
  white 
  

   joints. 
  The 
  body 
  measures 
  about 
  an 
  inch 
  in 
  length, 
  and 
  the 
  wings 
  

   expand 
  nearly 
  two 
  inches 
  (see 
  plate 
  i, 
  fig. 
  3). 
  

  

  Dr 
  Harris 
  has 
  appended 
  to 
  the 
  above 
  a 
  few 
  words 
  descriptive 
  of 
  the 
  

   male, 
  but 
  it 
  is 
  doubtful 
  if 
  they 
  pertain 
  to 
  this 
  species 
  The 
  males 
  are 
  

   not 
  often 
  met 
  with, 
  and 
  from 
  being 
  seldom 
  taken 
  in 
  association 
  with 
  the 
  

   females, 
  their 
  proper 
  reference 
  is 
  always 
  doubtful., 
  'Mr 
  Norton 
  has 
  

   remarked 
  (see 
  citation) 
  of 
  the 
  examples 
  of 
  a 
  male 
  described 
  by 
  Dr 
  

   Harris 
  as 
  Urocerus 
  ahdominalis 
  which 
  is 
  found 
  in 
  the 
  trunks 
  of 
  the 
  

   white 
  pine 
  in 
  July, 
  that 
  it 
  may 
  be 
  U. 
  albicornis 
  or 
  U. 
  Jlavicorfiis 
  (plate 
  i, 
  

   fig. 
  4), 
  but 
  it 
  is 
  more 
  probably 
  the 
  former. 
  For 
  its 
  description, 
  see 
  the 
  

   citation 
  given 
  above. 
  

  

  The 
  several 
  members 
  of 
  this 
  genus 
  are 
  commonly 
  known 
  as 
  horn-tails, 
  

   from 
  the 
  horn-like 
  projection 
  at 
  the 
  end 
  of 
  the 
  abdomen. 
  The 
  adults 
  

   are 
  usually 
  found 
  on 
  the 
  trunks 
  of 
  coniferous 
  trees 
  on 
  bright 
  days. 
  The 
  

   females 
  are 
  provided 
  with 
  an 
  extended 
  ovipositor 
  designed 
  to 
  bore 
  into 
  

   wood. 
  This 
  organ 
  consists 
  of 
  two 
  guides 
  about 
  half 
  an 
  inch 
  long 
  and 
  a 
  

  

  