2 
var.  soluta  BEZZI.  The  different  forms  are 
illustrated  by  reproduction  of  the  drawings 
(found  in  the  papers  of  these  authors)  and 
of  the  wings  in  the  present  specimens  (from 
microscopical  preparations).  Size,  habitat  and 
dimensions  of  these  are  carefully  given. 
The  study  of  all  these  forms  leads  to 
the  conclusion,  that  the  exemple,  given  by 
LOEW  (who  founded  new  species  on  small 
differences),  ought  not  to  be  followed.  There 
is  only  one  specimen  not  connected  with 
the  others  by  intermediate  forms.  Of  this  the 
authors  give  a  description,  calling  it:  A.fene • 
strata.  It  comes  from  the  Amazon  and  may 
be  a  new  species  or  only  a  rather  aberrant 
variety. 
All  these  considerations  seem  unimpor¬ 
tant  by  themselves,  but  they  are  of  interest 
for  the  questions  of  the  fixity  of  the  existing 
species  and  the  formation  of  new  ones. 
There  is  another  indigenous  species  of 
Anastrepha,  the  serpentina  WIED.,  injurious 
to  Mammea  americana  L.  and  Sapota  achras 
MILL.,  as  verified  by  HERRERA  and  TA¬ 
VARES.  COSTA  LIMA  bred  it  from  Lucuma 
cainito  A.  D.  C.  and  Mimusops  coricaea  MIQ. 
The  synonymy  and  a  photograph  of  the  cha- 
racteristical  wing  are  given  (Fig.  20). 
Of  the  genus  Hexachaeta  LOEW  (1873) 
one  species,  described  by  WIEDEMANN 
(1830)  as  Trypeta  eximia ,  was  also  observed 
in  two  specimens  from  near  Rio;  they  show 
a  tendency  to  varying.  Synonymy,  descriptions 
and  a  photograph  of  the  wings  are  also 
given. 
Follows  a  discussion  of  the  genus  Pla- 
giotoma  LOEW  (1873),  with  a  key  for  the 
described  and  new  brasilian  forms.  So  far  as 
it  is  known,  the  first  stages  of  these  flies  are 
found  in  galls  of  composites  of  the  genus  Ver- 
nonia,  as  verified  by  LOEW,  R.  V.  IHERING 
and  the  authors.  Two  forms  of  LOEW,  bise- 
riata  and  obliqua,  were  found  in  Brazil  and 
the  authors  describe  three  more,  differing  in 
the  number  of  black  dots  on  the  apical  end 
of  the  notum  and  also  in  the  design  of  the 
wings,  as  shown  by  photographs.  However 
the  question,  if  those  different  forms  ought 
to  be  considered  good  species  or  only  varie¬ 
ties,  remains  open  and  may  be  solved  by 
rearing  more  specimens. 
The  authors  then  give  a  catalogue  of  the 
genus  Apyrgota  HENDEL  (1913),  subfamily 
Pyrgotinae.  They  describe  a  new  species, 
personata,  which  might  be  mistaken  for  a 
Trypeta.  A  catalogue  of  the  genus  Anastre¬ 
pha  with  synonymy  and  littérature  ends  the 
paper. 
An  index  of  the  littérature  consulted  and 
an  explanation  of  the  plates  follows  the  Por¬ 
tuguese  text  and  might  be  consulted  there. 
