84 
time  in  the  Brazil  Hotel  and  explored  the 
place  which  seems  destined  to  become  a 
center  of  great  attraction.  They  also  visited 
Porto  Bertoni67  on  the  Paraná,  the  re¬ 
sidence  of  a  Swiss  naturalist,  Dr.  BERTONI, 
who  has  spent  most  of  his  life  in  Paraguay. 
From  Iguassú  the  travellers  descended 
the  Paraná  on  the  España 49  passing 
the  mouth  of  the  Iguassú66  where  Argen¬ 
tine,  Brazil  and  Paraguay  meet.  From  here 
downwards  the  right  bank  is  Paraguayan  while 
the  left  belongs  to  the  argentinian  Missiones. 
Owing  to  the  facilities  of  steam  naviga¬ 
tion,  there  are  many  settlements68  where 
timber  is  felled  and  shipped.  Between 
them,  the  forest  is  still  unbroken.  Only  near 
Encarnación  and  Posadas  the  shores  become 
gradually  more  cultivated,  while  the  river 
broadens  to  a  width  of  4  kilometers.  Posa¬ 
das,  on  the  argentine  shore,  is  the  capital  of 
the  Missiones  and  Encarnación  on  the  oppo¬ 
site  bank  is  an  important  Paraguayan  port, 
connected  by  railway  with  the  capital,  Assun- 
cion.  Both  are  rising  places. 
After  a  visit  to  Posadas693  and  a  short  stay  in 
Encarnación69,  the  travellers  went  by  rail  to  As- 
suncion70-73  where  they  were  very  kindly  recei¬ 
ved  by  the  authorities  and  the  physicians.  With 
Dr.  MIQONE,  the  director  of  the  bactériologie 
Institute,  they  went  to  San  Bernardino  on 
lake  Ipacarahy74  and  visited  the  remainders 
of  the  Rio  Salado75,  where  there  is  a  focus  of 
Mal  de  Cadeiras  (equine  trypanosomia¬ 
sis).  They  also  visited  the  Botanical  Garden 
in  Trinidad76-78,  where  they  saw  interesting 
plants  and  various  colections  and  made  studies 
in  the  hospitals  and  the  bactériologie  insti¬ 
tute.  After  a  pleasant  evening,  spent  with  the 
doctors  of  Assuncion,  they  embarked  for 
Buenos  Aires  on  the  large  river-steamer  Bru- 
xellas,  descending  first  the  Paraguay79, 
then  the  Paraná.  They  stopped  at  many 
ports,  some  of  them  belonging  to  important 
towns80.  After  three  days  journey  they  arrived 
in  Buenos  Aires81-82  where  they  stayed  several 
days  and  returned  to  Rio  by  water,  first  visi¬ 
ting  Montevideo.  They  stopped  several  days  in 
Rio  Grande83-87  but  barely  touched  Florianópo¬ 
lis89,  Itajahy",  São  Francisco100-101,  and  Para¬ 
naguá.  Dr.  ARAUJO  however  stayed  in 
the  city  of  Rio  Grande95-98  and  visited 
several  places88-94  in  the  same  state  before 
returning  to  Rio. 
Entomological,  zoological  and. 
botanical  notes 
by 
Dr.  Adolpho  Lutz. 
1.  Insects  observed  on  board  while  tra¬ 
velling. 
While  travelling  during  many  days  and 
by  various  crafts  on  the  Paraná  and  its  aflu- 
ents,  I  was  able  to  make  some  entomologi¬ 
cal  observations,  the  results  of  which,  combi¬ 
ned  with  others  obtained  under  similar  condi¬ 
tions,  are  not  altogether  devoid  of  biological 
interest. 
In  day-time,  few  insects  are  seen  on  the 
larger  rivers.  Those  met  with  are  mostly  but¬ 
terflies  which  attempt  to  cross  the  river,  ei¬ 
ther  isolated  or  in  bands,  as  some  Pieridae 
for  instance.  They  seldom  settle  on 
j  board.  Most  of  them  keep  near  the  banks 
where  they  can  be  seen  on  wet  spots  or 
at  rest  on  canoes  and  barges  moored  there. 
One  kind  of  Libythea  seemed  to  prefer  the 
deck  of  barges  to  any  other  resting  place 
and  gathered  there  in  large  numbers.  The 
same  may  be  said  of  some  large  Hymeno - 
ptera. 
In  the  woods  bordering  the  rivers,  Coleó¬ 
ptera  must  be  plentiful  but  only  a  few  isolated 
specimens  are  seen  flying  over  the  water. 
Some  Tabanidae  follow  the  rivers  and  in¬ 
vade  the  boats  even  in  broad  daylight,  as  for 
instance  Lepidoselaga  lepidota  and  two  kinds 
of  Diachlorus  :  flavitaenia  and  bimaculata,  ge¬ 
nerally  easily  distinguished  but  showing  forms 
of  transition.  These  species  are  never  found 
far  from  the  rivers  where  their  breeding  pla¬ 
ces  must  be  looked  for.  The  larvae  are  still 
unknown,  like  those  of  some  species  of  Esen- 
beckia ,  which  also  acompany  the  river  though 
they  do  not  favour  broad  daylight.  Chelotaba- 
nus  aurora ,  a  decidedly  fluviatile  species,  is 
seen  at  dusk.  Like  Lepidoselaga ,  it  is  also 
found  on  the  rivers  of  northern  Brazil. 
