found  during  the  recent  expedition,  and  besides  these,  three  additional 
species  were  discovered,  viz. : — AmbLyomma  maculatmn,  A.  dissimile 
and  Afonomma  sp.  Neumann  in  recent  years  has  given  a  doubtful 
record  of  Rhipicephahis  bursa  americana,  so  that  the  total  number 
of  known  species  recorded  from  Jamaica  is  ten. 
Some  observations  on  the  relative  abundance  of  these  ticks  will 
be  found,  under  the  respective  species  which  are  recorded  in  this 
memoir.  But  it  may  be  well  to  state  here  that  the  most  abundant 
kind  is  the  Texas-fever  tick  {M.  annul alus  australis),  and  next  to 
this  in  point  of  numbers  is  the  silver  tick  {Amblyomma  cajanense). 
The  former  is  essentially  a  cattle  tick,  though  it  infests  other  animals 
also  ;  while  the  latter  is  a  more  general  feeder  and  although  less 
abundant,  is  one  of  the  greatest  curses  to  the  Island,  owing  to  the 
fact  that  it  occurs  in  all  its  stages  among  the  grass  and  pastures, 
almost  everywhere  attacking  man  and  beast  with  impunity.  The 
almost  total  immunity  of  the  Mysore  cattle  from  the  attacks  of  ticks 
of  all  kinds  was  most  marked ;  this  was  particularly  the  case  at 
Shettlewood  and  other  places,  where  this  breed  of  cattle  was  used  for 
draft  purposes.  Crosses  between  the  Mysore  and  other  breeds  were 
also  much  less  subject  to  the  attacks  of  these  pests  ;  while  Shorthorns, 
Devons,  Herefords,  and  Creoles  suffered  most.  Indeed  ticks  show 
a  decided  preference  for  all  cattle  which  have  little  or  no  Indian  or 
Spanish  strain  in  their  blood  ;  they  have  apparently  a  great  dislike 
to  animals  with  short  fine  hair  ;  hence,  probably,  the  immunity  of  the 
Indian  and  Spanish  races. 
It  is  claimed  also  that  ticks  show  a  decided  preference  for  animals 
in  bad  or  poor  condition  ;  and  that  a  small  percentage  of  animals  of 
all  breeds  are  much  more  susceptible  to  ticks  than  others  of  the  same 
herd  living  under  precisely  the  same  conditions.  Freshly  imported 
European  breeds  suffer  terribly,  due,  as  one  correspondent  puts  it,  to 
the  ‘  want  of  proper  care  and  attention  which  their  better  breeding 
requires  ;  consequently  these  animals  are  seldom  in  really  good  health, 
and  so  gradually  become  a  special  prey  of  ticks.’  Horses  with  long 
heavy  manes  and  excessively  hairy  fetlocks  are  particularly  troubled 
by  ticks,  but  there  are  instances  recorded  '  where  there  are  now  and 
always  have  been  horses  which  never  under  any  circumstances  have 
ticks  ’  (Clarendon  district).  Mules  are  particularly  free,  though,  like 
horses,  they  are  subject  to  the  tropical  horse  tick  (Dermacenior 
