The Collaborative International Dictionary of English v.0.48:

Ant-lion \Ant"-li`on\, n. (Zool.)
   A neuropterous insect, the larva of which makes in the sand a
   pitfall to capture ants, etc. The common American species is
   Myrmeleon obsoletus, the European is Myrmeleon
   formicarius.
   [1913 Webster] Antoeci