diff --git a/eo/src/paradisEO/island/eoMigUpdater.h b/eo/src/paradisEO/island/eoMigUpdater.h
new file mode 100644
index 00000000..d15cdb92
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+++ b/eo/src/paradisEO/island/eoMigUpdater.h
@@ -0,0 +1,141 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+// "eoMigUpdater.h"
+
+// (c) OPAC Team, LIFL, 2002
+
+/* This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+   
+   Cont	act: cahon@lifl.fr
+*/
+
+#ifndef eoMigUpdater_h
+#define eoMigUpdater_h
+
+#include <eoPop.h>
+#include <eoSelect.h>
+#include <eoReplacement.h>
+#include <eoContinue.h>
+#include <utils/eoUpdater.h>
+#include <paradisEO/island/eoConnectivity.h>
+#include <paradisEO/comm/messages/to/eoEOSendMessTo.h>
+#include <paradisEO/comm/messages/to/eoEOReceiveMessTo.h>
+#include <mpi.h>
+
+/**
+   An updater. After any evolution of an evolutionnary algorithm, it
+   moves some EO from/into the current population from/to a subset
+   of the neighbouring algos.
+*/
+
+template <class EOT> class eoMigUpdater : public eoUpdater {
+  
+public :
+  
+  /**
+     Constructor. Some features which should be specified.
+     - The neighbouring interface,
+     - The communication topology,
+     - Which EO instancies from the given population should be sent ?
+     - How integrate new immigrants ?
+     - Then, an event to determine the time to ask neighbouring sources
+       for sending sets of EO.
+  */
+
+  eoMigUpdater (eoListener <EOT> & _listen,
+		eoConnectivity <EOT> & _conn,
+		eoContinue <EOT> & _cont,
+		eoSelect <EOT> & _select,
+		eoReplacement <EOT> & _replace) :
+    listen (_listen),
+    conn (_conn),
+    cont (_cont),
+    select (_select),
+    replace (_replace) {
+  
+  }
+  
+  /**
+     Sets the given population to be the one to receive and/or send EO
+  */
+
+  void operator () (eoPop <EOT> & _pop) {
+    
+    pop = & _pop ;
+  }
+
+  /**
+     Should be often called. (after each local evolution ?)
+   */
+
+  virtual void operator () () {
+    
+    listen.update () ;
+    //    listen.display () ;
+    
+    vector <eoLocalListener <EOT> *> src = conn.from (), dest = conn.to () ;
+    
+    // Any coming immigrants ?
+    for (int i = 0 ; i < src.size () ; i ++) {
+      src [i] -> update () ;
+      while (! src [i] -> empty ()) {
+	replace (* pop, src [i] -> front ()) ;
+	cout << "[" << listen.here ().host_name << "] Arrival of " << src [i] -> front ().size () << " individuals ..." << endl ;
+	src [i] -> pop () ;
+      }
+    }
+    
+    // Any request ?
+    for (int i = 0 ; i < dest.size () ; i ++)
+      if (dest [i] -> need_immigration ()) {
+	eoPop <EOT> emm ; // Emmigrants
+	select (* pop, emm) ;
+	eoEOSendMessTo <EOT> mess (emm) ;
+	mess (* (dest [i])) ;
+      }
+    
+    // Any request to submit ?
+    if (! cont (* pop))
+      for (int i = 0 ; i < src.size () ; i ++) {
+	eoEOReceiveMessTo <EOT> mess ;
+	mess (* (src [i])) ;
+    }
+  }
+
+private :
+  
+  eoConnectivity <EOT> & conn ; // The used topology
+  
+  eoContinue <EOT> & cont ; /* The 'event' which determines
+			       need of immigration */
+			       
+  eoSelect <EOT> & select ; /* In order to select emmigrants
+			       from the current population */
+  
+  eoReplacement <EOT> & replace ; // The replacement procedure
+
+  eoPop <EOT> * pop ; // The population considered
+  
+  eoListener <EOT> & listen ; // A reference to the neighbouring
+
+} ; 
+
+#endif
+
+
+
+
+
+