﻿308 
  

  

  Hood 
  (D.). 
  Two 
  Porto 
  Rican 
  Thysanoptera 
  from 
  Sugar 
  Cane. 
  — 
  Insec, 
  

   Inscit. 
  Menstruns, 
  Washington, 
  ii, 
  no. 
  3, 
  March 
  1914, 
  pp. 
  38-41, 
  

   Ifig. 
  

  

  Two 
  species 
  of 
  thrips, 
  Helioihri'ps 
  fenwralis, 
  Keuter, 
  and 
  Haplothrips 
  

   (?) 
  tibialis, 
  sp. 
  n., 
  are 
  recorded 
  as 
  occurring 
  on 
  sugar-cane 
  in 
  Porto 
  Rico 
  ; 
  

   they 
  are 
  both 
  additions 
  to 
  the 
  hst 
  of 
  insects 
  known 
  to 
  affect 
  that 
  plant, 
  

   as 
  well 
  as 
  to 
  the 
  known 
  Thysanopterous 
  fauna 
  of 
  the 
  island. 
  

  

  CocKERELL 
  (T. 
  0. 
  A.). 
  A 
  New 
  Coccid 
  from 
  Arizona.— 
  ^w^om. 
  News, 
  

   Philadelphia, 
  xxv, 
  no. 
  3, 
  March 
  1914, 
  p. 
  110. 
  

  

  A 
  new 
  species 
  of 
  Coccid 
  is 
  described 
  under 
  the 
  name 
  Pakteoccoeus 
  

   morrilli. 
  It 
  was 
  taken 
  on 
  a 
  plant 
  resembling, 
  though 
  not 
  identical 
  

   wdth, 
  Viborquiaspinosa. 
  

  

  Forest 
  Insect 
  Ravages 
  stopped. 
  — 
  Ind. 
  Forester, 
  Allahabad, 
  xl, 
  no. 
  3, 
  

   March 
  1914, 
  pp. 
  117. 
  [Extract 
  from 
  American 
  Forestry.] 
  

  

  By 
  a 
  prompt 
  campaign 
  against 
  a 
  colony 
  of 
  bark 
  beetles 
  (Scoly- 
  

   tidae) 
  in 
  the 
  Ochoco 
  National 
  Forest 
  in 
  central 
  Oregon, 
  a 
  danger 
  which 
  

   threatened 
  to 
  destroy 
  millions 
  of 
  feet 
  of 
  timber 
  was 
  eliminated. 
  To 
  

   combat 
  this 
  pest 
  the 
  usual 
  method, 
  recommended 
  by 
  the 
  U. 
  S. 
  Bureau 
  of 
  

   Entomology, 
  is 
  to 
  remove 
  the 
  bark 
  of 
  infested 
  trees 
  between 
  October 
  

   and 
  July, 
  while 
  the 
  larvae 
  are 
  still 
  in 
  the 
  tree 
  ; 
  this 
  is 
  sufficient 
  to 
  kill 
  

   them 
  and 
  the 
  timber 
  may 
  be 
  sold 
  while 
  it 
  is 
  yet 
  sound. 
  In 
  the 
  Ochoco 
  

   Forest 
  there 
  was 
  no 
  market, 
  and 
  the 
  forest 
  officers 
  found 
  that 
  the 
  

   cheapest 
  and 
  most 
  effective 
  method 
  of 
  control 
  was 
  to 
  cut 
  the 
  trees 
  and 
  

   burn 
  them 
  before 
  the 
  new 
  broods 
  of 
  beetles 
  could 
  emerge. 
  In 
  1912 
  the 
  

   infestation 
  was 
  given 
  a 
  decided 
  check 
  by 
  the 
  cutting 
  of 
  3,500 
  trees. 
  

   In 
  1913, 
  40,000 
  trees 
  were 
  cut, 
  and 
  as 
  a 
  result 
  of 
  these 
  measures 
  the 
  

   beetles 
  are 
  under 
  control. 
  , 
  

  

  Control 
  Work 
  against 
  Forest 
  Insect 
  Depredations 
  in 
  the 
  Hetch-Hetchy 
  

   Watershed 
  of 
  the 
  Yosemite 
  National 
  Park.^ 
  — 
  Entom. 
  News, 
  Phila- 
  

   delphia, 
  xxv, 
  no. 
  3, 
  Mar. 
  1914, 
  pp. 
  132-133. 
  

  

  Investigations 
  have 
  shown 
  that 
  as 
  much 
  as 
  95 
  per 
  cent, 
  of 
  the 
  timber, 
  

   in 
  some 
  of 
  the 
  canyons 
  and 
  valleys 
  of 
  the 
  Tuolumne 
  River, 
  has 
  been 
  

   killed 
  by 
  bark-boring 
  insects. 
  This 
  condition, 
  affecting 
  the 
  scenic 
  

   beauty 
  of 
  the 
  north 
  of 
  the 
  Yosemite 
  Valley 
  and 
  its 
  consequent 
  effect 
  

   on 
  the 
  water 
  supply 
  and 
  general 
  economy 
  of 
  the 
  Hetch 
  Hetchy 
  project, 
  

   presented 
  an 
  important 
  problem, 
  and 
  arrangements 
  were 
  made 
  to 
  

   combat 
  the 
  beetles. 
  Two 
  acres 
  were 
  marked 
  off, 
  and 
  on 
  one, 
  measures 
  

   were 
  taken 
  during 
  July, 
  before 
  the 
  beetles 
  would 
  have 
  begun 
  to 
  emerge 
  

   from 
  the 
  bark 
  ; 
  the 
  second 
  area 
  was 
  treated 
  in 
  September 
  and 
  at 
  the 
  

   beginning 
  of 
  October, 
  at 
  the 
  time 
  when 
  the 
  beetles 
  coming 
  from 
  the 
  

   overwintered 
  broods 
  had. 
  entered 
  the 
  bark. 
  The 
  measures 
  taken 
  were 
  

   to 
  fell 
  the 
  infested 
  trees, 
  lop 
  off 
  the 
  limbs, 
  pile 
  them 
  on 
  the 
  trunks 
  and 
  

   set 
  fire 
  to 
  the 
  whole 
  ; 
  this 
  scorched 
  or 
  burned 
  the 
  bark 
  sufficiently 
  to 
  

   kill 
  the 
  insects. 
  The 
  trees 
  thus 
  treated, 
  1,671 
  in 
  all, 
  ranged 
  in 
  diameter 
  

   from 
  6 
  inches 
  to 
  54 
  inches, 
  the 
  average 
  being 
  about 
  22J 
  inches. 
  The 
  

   cost 
  was 
  about 
  £240. 
  It 
  is 
  estimated 
  that 
  a 
  further 
  outlay 
  of 
  about 
  

   £100 
  will 
  suffice 
  to 
  bring 
  the 
  beetle 
  quite 
  under 
  control. 
  The 
  insect 
  

   responsible 
  for 
  the 
  death 
  of 
  such 
  a 
  large 
  percentage 
  of 
  lodgepole 
  pine 
  

  

  