You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20141115143455" timestamp="2014-11-15T14:34:55Z" ns="0" title="Pfeilspitzen Algerien" />
        <page value="20141121211841" timestamp="2014-11-21T21:18:41Z" ns="0" title="Pfeilspitzen aus Libyen" />
        <page value="20141121211856" timestamp="2014-11-21T21:18:56Z" ns="0" title="Pfeilspitzen aus Mali" />
        <page value="20141121211916" timestamp="2014-11-21T21:19:16Z" ns="0" title="Pfeilspitzen aus Westsahara" />
        <page value="20141126185942" timestamp="2014-11-26T18:59:42Z" ns="0" title="Pfeilspitzen" />
        <page value="20141201222751" timestamp="2014-12-01T22:27:51Z" ns="0" title="Fundstellen in Mauretanien" />
        <page value="20141202201448" timestamp="2014-12-02T20:14:48Z" ns="0" title="Fundstellen in Marokko" />
        <page value="20141202204024" timestamp="2014-12-02T20:40:24Z" ns="0" title="Fundstellen in Sudan" />
        <page value="20141202213432" timestamp="2014-12-02T21:34:32Z" ns="0" title="Fundstellen in Tschad" />
        <page value="20141202224308" timestamp="2014-12-02T22:43:08Z" ns="0" title="Fundstellen in Mali" />
      </results>
    </querypage>
  </query>
</api>