﻿340 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  more 
  slender 
  median 
  saw 
  nearly 
  an 
  inch 
  in 
  length. 
  Upon 
  finding 
  a 
  

   suitable 
  place, 
  she 
  drives 
  this 
  instrument 
  with 
  a 
  sawing 
  motion 
  into 
  the 
  

   wood 
  to 
  its 
  full 
  length, 
  and 
  deposits 
  her 
  eggs 
  therein. 
  

  

  Life 
  history. 
  The 
  Hfe 
  history 
  of 
  this 
  species 
  has 
  not 
  been 
  worked 
  

   out. 
  It 
  is 
  presumably 
  similar 
  to 
  that 
  of 
  the 
  other 
  members 
  of 
  the 
  genus. 
  

   The 
  eggs 
  are 
  deposited 
  in 
  pine 
  or 
  spruce, 
  dying 
  or 
  diseased 
  timber 
  is 
  

   apparently 
  preferred, 
  although 
  they 
  are 
  known 
  to 
  oviposit 
  in 
  recently 
  

   felled 
  trees. 
  The 
  larvae 
  run 
  large 
  burrows 
  through 
  the 
  trunks, 
  often 
  ren- 
  

   dering 
  them 
  unfit 
  for 
  building 
  purposes. 
  The 
  images 
  are 
  abroad 
  in 
  

   July 
  and 
  August, 
  but 
  nothing 
  seems 
  to 
  be 
  recorded 
  of 
  the 
  duration 
  of 
  

   either 
  the 
  larval 
  or 
  pupal 
  stages 
  of 
  this 
  insect. 
  

  

  Distribution. 
  Fabricius 
  records 
  U. 
  albicornis 
  from 
  bdth 
  North 
  and 
  

   South 
  America. 
  Later 
  observers 
  have 
  reported 
  it 
  from 
  the 
  following 
  

   legalities: 
  New 
  England; 
  New 
  York; 
  New 
  Jersey; 
  Louisiana; 
  state 
  of 
  

   Washington; 
  Ottawa, 
  Canada; 
  Lake 
  Winnipeg; 
  Newfoundland; 
  North- 
  

   west 
  Territory. 
  Cameron 
  (see 
  citation) 
  calls 
  attention 
  to 
  the 
  fact 
  that 
  

   though 
  this 
  insect 
  and 
  other 
  American 
  species 
  of 
  the 
  genus 
  are 
  taken 
  

   from 
  time 
  to 
  time 
  in 
  England, 
  they 
  are 
  usually 
  found 
  near 
  railway 
  

   stations, 
  mines 
  and 
  other 
  places 
  where 
  they 
  might 
  easily 
  have 
  emerged 
  

   from 
  timber 
  imported 
  from 
  America. 
  He 
  does 
  not 
  regard 
  the 
  species 
  

   as 
  indigenous 
  to 
  England. 
  Its 
  normal 
  habitat 
  is 
  probably 
  limited 
  to 
  the 
  

   greater 
  portion 
  of 
  the 
  United 
  States 
  and 
  British 
  America. 
  

  

  Comparatively 
  harmless. 
  Although 
  some 
  alUed 
  species 
  are 
  re- 
  

   garded 
  as 
  quite 
  injurious 
  to 
  pine 
  forests 
  in 
  Germany, 
  in 
  this 
  country 
  their 
  

   ravages 
  are 
  as 
  a 
  rule 
  of 
  not 
  much 
  economic 
  importance. 
  In 
  most 
  cases 
  

   they 
  attack 
  only 
  the 
  diseased 
  and 
  dying 
  trees. 
  

  

  Urocerus 
  cressoni 
  Norton 
  

  

  Ord. 
  Hymenoptera 
  : 
  Fam. 
  Uroceridae 
  

  

  Norton, 
  Edward. 
  Entomological 
  society 
  of 
  Philadelphia. 
  Proceed- 
  

   ings. 
  1864. 
  3:16 
  (original 
  description); 
  American 
  entomological 
  

   society. 
  Transactions. 
  1868-69. 
  ^ 
  1361-62 
  (insect 
  and 
  varieties 
  

   described). 
  

  

  Lintner, 
  J. 
  A. 
  Country 
  gentleman. 
  1884. 
  49:9 
  (brief 
  account); 
  

   Insects 
  of 
  New 
  York. 
  5th 
  Rep't. 
  1889. 
  p. 
  311 
  (abstract 
  of 
  preceding). 
  

  

  Cresson, 
  E. 
  T. 
  Synopsis 
  of 
  the 
  hymenoptera 
  of 
  America. 
  1887. 
  

   p. 
  173 
  (listed). 
  

  

  Smith, 
  J. 
  B. 
  Catalogue 
  of 
  the 
  insects 
  of 
  New 
  Jersey. 
  1890. 
  p. 
  15 
  

   (listed). 
  

  

  