﻿Miscellaneous 
  Intelligence. 
  453 
  

  

  possible 
  extent 
  the 
  natural 
  resources 
  of 
  the 
  world, 
  has 
  compelled 
  

   a 
  new 
  inquiry 
  into 
  the 
  economic 
  relations 
  existing 
  between 
  man 
  

   and 
  the 
  other 
  animals. 
  The 
  enormous 
  destruction 
  of 
  food 
  sup- 
  

   plies 
  and 
  other 
  property 
  by 
  the 
  various 
  groups 
  of 
  animals, 
  and 
  

   the 
  immense 
  services 
  to 
  man 
  rendered 
  by 
  other 
  groups 
  have 
  been 
  

   but 
  little 
  realized 
  by 
  the 
  general 
  public. 
  To 
  supply 
  this 
  infor- 
  

   mation 
  to 
  the 
  pupil 
  in 
  the 
  later 
  years 
  of 
  the 
  secondary 
  school 
  or 
  

   in 
  the 
  college 
  is 
  the 
  aim 
  of 
  this 
  book. 
  The 
  economic 
  importance 
  

   of 
  each 
  of 
  the 
  groups 
  of 
  animals 
  and 
  of 
  the 
  common 
  species 
  of 
  

   each 
  of 
  the 
  more 
  important 
  groups 
  is 
  clearly 
  and 
  untechnically 
  

   explained, 
  with 
  many 
  practical 
  measures 
  for 
  the 
  protection 
  of 
  

   the 
  beneficial 
  forms 
  and 
  for 
  the 
  destruction 
  of 
  those 
  that 
  are 
  

   injurious. 
  

  

  The 
  book 
  will 
  appeal 
  particularly 
  to 
  the 
  student 
  of 
  agriculture, 
  

   for 
  the 
  information 
  which 
  it 
  contains 
  is 
  well-nigh 
  indispensable 
  

   to 
  the 
  success 
  of 
  his 
  calling. 
  w. 
  r. 
  c. 
  

  

  8. 
  Economic 
  Entomology 
  : 
  Class-book 
  of 
  Economic 
  Entomol- 
  

   ogy, 
  with 
  special 
  reference 
  to 
  the 
  Economic 
  Insects 
  of 
  the 
  North- 
  

   ern 
  United 
  States 
  and 
  Canada; 
  by 
  William 
  Lochhead. 
  Pp. 
  

   xiv, 
  436, 
  with 
  257 
  illustrations, 
  Philadelphia, 
  1919 
  (P. 
  Blakis- 
  

   ton's 
  Son 
  and 
  Co.). 
  — 
  The 
  present 
  world 
  shortage 
  of 
  food 
  is 
  not 
  

   alone 
  due 
  to 
  the 
  decreased 
  crop 
  acreage 
  in 
  the 
  countries 
  at 
  war, 
  

   but 
  in 
  large 
  measure 
  to 
  the 
  destruction 
  of 
  crops 
  and 
  food 
  prod- 
  

   ucts 
  by 
  insects. 
  The 
  monetary 
  loss 
  last 
  year 
  in 
  the 
  "United 
  

   States 
  alone 
  was 
  upwards 
  of 
  two 
  billions 
  of 
  dollars, 
  not 
  to 
  men- 
  

   tion 
  the 
  alleviation 
  of 
  suffering 
  in 
  other 
  countries 
  which 
  would 
  

   now 
  be 
  possible 
  if 
  the 
  food 
  destroyed 
  by 
  insects 
  could 
  have 
  been 
  

   harvested 
  and 
  transported 
  to 
  those 
  in 
  need. 
  

  

  This 
  book 
  contains 
  in 
  untechnical 
  language 
  precisely 
  the 
  infor- 
  

   mation 
  needed 
  for 
  an 
  understanding 
  of 
  the 
  general 
  structure, 
  

   classification 
  and 
  habits 
  of 
  insects 
  and 
  their 
  economic 
  relation 
  to 
  

   each 
  other, 
  to 
  other 
  groups 
  of 
  organisms 
  and 
  to 
  human 
  industry. 
  

   The 
  subject 
  matter 
  is 
  divided 
  into 
  four 
  parts. 
  Part 
  I 
  describes 
  

   the 
  structure, 
  growth 
  and 
  economics 
  of 
  insects, 
  with 
  a 
  concise 
  

   account 
  of 
  their 
  beneficial 
  and 
  injurious 
  aspects 
  and 
  their 
  inter- 
  

   relations 
  with 
  other 
  groups 
  of 
  organisms. 
  Part 
  II 
  contains 
  

   convenient 
  lists 
  of 
  the 
  more 
  important 
  species 
  which 
  injure 
  each 
  

   of 
  the 
  cereal 
  crops, 
  fruits, 
  shade-trees, 
  greenhouse 
  plants, 
  domes- 
  

   tic 
  animals 
  and 
  household 
  articles. 
  Part 
  III 
  comprises 
  the 
  classi- 
  

   fication 
  of 
  insects, 
  with 
  descriptions 
  of 
  the 
  more 
  common 
  species 
  

   of 
  each 
  of 
  the 
  orders, 
  with 
  special 
  methods 
  of 
  control 
  of 
  the 
  most 
  

   injurious 
  species. 
  Part 
  IV 
  discusses 
  the 
  general 
  principles 
  of 
  

   insect 
  control, 
  with 
  practical 
  directions 
  for 
  the 
  preparation 
  and 
  

   application 
  of 
  remedies. 
  

  

  While 
  the 
  book 
  is 
  perhaps 
  designed 
  more 
  particularly 
  for 
  the 
  

   student 
  of 
  agriculture, 
  who 
  will 
  find 
  in 
  it 
  about 
  all 
  the 
  informa- 
  

   tion 
  he 
  requires 
  on 
  the 
  subject, 
  it 
  may 
  be 
  recommended 
  to 
  others 
  

   who 
  desire 
  a 
  really 
  practical 
  knowledge 
  of 
  our 
  common 
  insects 
  

   in 
  their 
  relation 
  to 
  human 
  welfare. 
  w. 
  r. 
  c. 
  

  

  