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>
    <alllinks galcontinue="Banisteriopsis_argentea|9" />
  </query-continue>
  <query>
    <pages>
      <page pageid="135" ns="14" title="Category:Method Tek" />
      <page pageid="202" ns="14" title="Category:Extraction Tek" />
      <page pageid="285" ns="14" title="Category:DMT" />
      <page pageid="476" ns="0" title="BLAB - The Big Lazy A/B" />
      <page pageid="841" ns="0" title="Acacia cornigera" />
      <page pageid="1200" ns="0" title="BLAB - The Big Leisurely AB" />
      <page pageid="1238" ns="0" title="Psilocin and Psilocybin" />
      <page pageid="5353" ns="0" title="Bufotenine Dry Tek" />
      <page pageid="5354" ns="0" title="BW Bufotenine Dry Tek" />
    </pages>
  </query>
</api>