282 
Anyuial  Report  for  1904  of  the  Zoologist. 
Currant  Aphis  {Myzus  rihis). — This  is  the  commonest 
of  thi*ee  species  of  aphis  which  infest  cnrrant  bushes.  The 
tops  suffer  most,  and  it  is  well  to  cut  them  off  and  burn  them. 
Cabbage  Aphis  [Aphis  hrassicce). 
Turnip  Aphis  [Aphis  rupee). 
Bean  Aphis  [Aphis  rurnicis  ; Black  Dolphin,  Collier, 
Smother  fly). — Attacks  at  first  chiefly  the  tops  of  bean  plants 
which  it  is  important  to  cut  off  and  burn  the  moment  the 
pest  appears.  Also  found  on  dock,  thistle,  and  furze,  on 
which  last  its  eggs  have  been  found  in  great  numbers. 
Apple  Aphis  [Aphis  niali). — The  common  green  flj'  of 
the  apple  ; not  to  be  confounded,  as  it  often  is,  with  the 
“ apple  sucker.” 
Pine  Aphis  [Lachnus  pini). — Infesting  Scotch  fir. 
SCHIZONEURIN^. 
Woolly  Aphis  or  American  Blight  [Schizoneura 
lanigera). — This  familiar  plant  louse  possesses  no  cornicles 
and  does  not  manufacture  honey-dew,  but  the  young  insects 
exude  streamers  of  woolly  substance  from  their  backs  by  which 
they  are  protected.  On  account  of  their  situation  on  the  rough 
bark  more  drastic  measures  are  permissible  than  with  leaf- 
feeding aphids.  Scraping  and  scrubbing  with  strong  emulsion 
is  advisable.  An  alkali  wash  may  be  used  in  winter. 
CHERMESINJi:. 
Spruce  Bug  [Ghermes  ahietis). — Attacks  the  young  shoots, 
causing  cone-like  galls. 
Larch  Bug  [Ghermes  laricis). — Its  presence  on  the  larch 
twigs  is  indicated  by  the  appearance  of  a woolly  substance  like 
that  of  American  blight.  Probably  this  insect  is  another  form 
of  the  spruce  bug  and  has  to  migrate  to  the  spruce  to  complete 
its  life-cycle. 
The  Apple  Sucker  [Psylla  mali). 
Does  not  belong  to  the  Aphidse,  but  to  a group  intermediate 
between  the  green  fly  and  the  frog  hoppers,  known  as  the 
Psyllidfe.  Its  importance  as  a pest  has  only  recentlj"  been 
recognised,  partly,  no  doubt,  on  account  of  its  small  size — it 
is  only  one-twelfth  of  an  inch  in  length — and  partly  from  its 
habit  of  boring  into  the  young  buds,  and  thus  effectually  hiding 
itself.  The  eggs,  which  are  laid  on  the  shoots,  hatch  in  April, 
and  the  young  enter  the  buds,  which  may  be  seen  to  be 
diseased  by  the  little  globules  of  honey-dew  dotting  all  the 
neighbouring  part  of  the  plant.  Many  eggs  can  be  removed 
by  winter  pruning,  the  primings  being  carefully  burnt. 
