424 
nitens).  Goats  may  be  said  to  be  practically  immune  ;  but  pigs  are 
much  subject  to  them,  and  more  especially  are  the  ears  of  this  animal 
infested  by  the  ‘  grass  lice  ’  or  larvae.  Dogs  also  suffer,  chiefly  from 
the  bites  of  Rhipicephalus  sanguineus,  though  other  kinds  infest 
them. 
SEASONAL  PREVALENCE  OF  TICKS 
During  the  writer’s  stay  in  the  Island,  from  the  end  of  November 
till  the  end  of  January,  ticks  of  nearly  all  kinds  were  found  breeding 
in  profusion ;  and  the  commoner  species  were  seen  in  all  stages, 
including  eggs,  larvae  ('  grass  lice  ’),  nymphs  and  adults.  The  informa¬ 
tion  supplied  by  the  planters  points  very  clearly  to  the  fact  that  the 
season  in  which  ticks  are  most  prevalent  is  during  the  dry  winter 
months,  and  that  relatively  few  ticks  are  found  during  the  rainy 
season.  There  is  some  indication,  however,  that  the  seasons  may 
vary  in  certain  parts  of  the  Island,  more  especially  so  in  the  parish  of 
St.  Mary  and  Portland.  It  may  be  interesting,  if  not  important  from 
an  economic  point  of  view,  therefore,  to  give  a  tabular  statement  of 
the  returns  which  were  made  in  regard  to  this  question  .-  — 
Season  during  which  Ticks  are  said  to  be  most  abundant 
Parish 
Grass  Lice  or  Larvae 
Stages  not  stated 
St.  Ann  ... 
St.  Andrew 
Clarendon 
St.  Catherine 
St.  Elizabeth 
St.  James 
N  ovember- April 
August-April 
N  ovember- April 
November-April 
N  ovember-May 
December-May 
January  and  February 
November-April 
Adarch-September  or  during  spring 
Dry  season 
Not  stated 
Dry  season 
Dry  season 
Dry  season 
Not  stated 
Dry  season 
Manchester 
St.  Mary 
and  hot  weather 
April  and  May  or  ‘  early  part  of  year  ’ 
‘  Spring  months  ’ 
August-April 
Dry  season 
Portland  ... 
St.  Thomas 
Trelawney 
Not  stated 
Not  stated 
Not  stated 
Dry  season 
Westmoreland 
EFFECT  OF  RAIN  OR  WATER  ON  TICKS 
AND  THEIR  EGGS 
No  experiments  were  made  to  determine  the  effect  of  submerging 
the  eggs  of  ticks  in  water.  But  Hunter  and  Hooker,*  in  their  valuable 
♦Bull.  No.  72,  U.S.  Dept.  Agr.  Bur.  of  Krit.,  1907,  p.  22 
