Antlion

Antlions are large insects (~1m high). They survive by burrowing themselves into the earth and hunting prey who wander into their territory unawares with their sharp claws. They are quick, and can also make long jumps by using their wings as support.

Antlions are blind, but are highly susceptible to pheromones, which are secreted from the bodies of the antlion guards in order to control their smaller brethren. Antlion Guards are probably a natural mutation of the species, and are very big, possessing power comparable to that of a rhinoceros. This mutation, if natural, would work in the same aspect of ants, leading to a possibility of even larger types of the species yet to be seen.

Source: Half Life 2