﻿SCALE 
  INSECTS 
  OF 
  IMPORTANCE 
  

  

  299 
  

  

  nus 
  mytilaspidis, 
  which 
  he 
  found 
  had 
  destroyed 
  from 
  about 
  50% 
  

   to 
  60% 
  of 
  the 
  scales. 
  Aphelinus 
  fuscipennis 
  How. 
  is 
  recorded 
  

   as 
  a 
  most 
  efficient 
  parasite 
  of 
  this 
  scale 
  in 
  California. 
  Aspid^otipha- 
  

   gus 
  citrinus 
  Craw, 
  has 
  been 
  reared 
  from 
  this 
  pest 
  in 
  that 
  state. 
  The 
  

   accompanying 
  figure 
  will 
  give 
  a 
  good 
  idea 
  of 
  the 
  appearance 
  of 
  these 
  

   tiny 
  Chalcids. 
  The 
  best 
  evidence 
  of 
  their 
  work 
  is 
  the 
  small 
  circular 
  

   holes 
  in 
  the 
  dead 
  scales, 
  orifices 
  by 
  which 
  these 
  little 
  friends 
  have 
  escaped. 
  

   Aphelinus 
  abnormis 
  How. 
  is 
  another 
  parasite 
  of 
  this 
  bark 
  louse. 
  

   Anaphes 
  gracilis 
  How. 
  and 
  Chiloneurus 
  diaspidin- 
  

   arum 
  How. 
  have 
  also 
  been 
  reared 
  from 
  this 
  insect. 
  

  

  Fig. 
  1 
  A 
  spi 
  d 
  iotip 
  hagus 
  citrinus 
  Craw., 
  greatly 
  enlarged 
  (After 
  Howard. 
  Insect 
  

   life. 
  1894. 
  6 
  : 
  229) 
  

  

  Coccinellid 
  or 
  lady 
  bug 
  larvae 
  prey 
  on 
  this 
  species, 
  and 
  certain 
  mites, 
  

   Tyroglyphus 
  malus 
  Shimer, 
  are 
  also 
  credited 
  with 
  this 
  habit. 
  A 
  

   French 
  investigator 
  has 
  apparently 
  shown 
  that 
  this 
  Tyroglyphus 
  

   does 
  not 
  feed 
  on 
  the 
  eggs, 
  but 
  a 
  species 
  is 
  described, 
  under 
  the 
  name 
  of 
  

   Hemisarcoptes 
  coccisugus 
  Lign., 
  which 
  does 
  valiant 
  service 
  

   in 
  destroying 
  them. 
  

  

  Three 
  European 
  birds, 
  the 
  blue 
  tit, 
  the 
  long-tailed 
  tit 
  and 
  the 
  tree 
  

   creeper 
  are 
  known 
  to 
  feed 
  on 
  this 
  insect. 
  

  

  Remedies. 
  The 
  hatching 
  of 
  the 
  young 
  the 
  latter 
  part 
  of 
  May 
  or 
  in 
  

   early 
  June 
  renders 
  it 
  practicable 
  to 
  control 
  this 
  insect 
  by 
  applying 
  a 
  con- 
  

   tact 
  insecticide 
  June 
  i 
  or 
  later 
  in 
  order 
  to 
  kill 
  the 
  young 
  scale 
  insects 
  

   before 
  they 
  are 
  protected 
  by 
  a 
  thick 
  scale. 
  

  

  Bibliography 
  

   Fitch, 
  Asa. 
  N. 
  Y. 
  state 
  agric. 
  soc. 
  Trans. 
  1854. 
  14: 
  735-42 
  (gen- 
  

   eral 
  account 
  of 
  injuries 
  and 
  distribution, 
  as 
  Aspidiotus 
  conchi- 
  

  

  