1.js

// asynchonously parsing each continent
var main = function (continets, on_complete) {
  var counter = 0;
  var agencies = [];

  on_complete = function (err, data) {
    agencies = agencies.concat(data);
    counter++;
    if (counter === continents.length) {
      return agencies;
    }
  }

  async.each(continents,
    function (url, next) {
      p.process(url, on_complete);
    },
    function (err) {
      console.log(agencies);
      if (err) { 
        console.log(err); 
      }
    }
  );
}

main(continents, function(err, data){
  console.log(data);
});