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>
    <pages>
      <page pageid="46424" ns="0" title="William Wright Smith" />
      <page pageid="473806" ns="0" title="Apenesia megaventris" />
      <page pageid="139377" ns="0" title="Christen Smith" />
      <page pageid="502532" ns="0" title="Derelomus uniformis" />
      <page pageid="462229" ns="0" title="Figulus planifrons" />
      <page pageid="288537" ns="0" title="Cladidium bolanderi" />
      <page pageid="345524" ns="0" title="Prosphodrus occultus" />
      <page pageid="348331" ns="0" title="Thelenella madreporiformis" />
      <page pageid="112689" ns="0" title="Turkaromia" />
      <page pageid="480714" ns="0" title="Galium nigdeensis" />
    </pages>
  </query>
</api>