Escamoles are the larvae of a venomous ant species that lay their eggs deep down in the roots of agave or maguey plants in Mexico (so harvesting them is not a barrel of laughs). The larvae are said to have a consistency akin to cottage cheese and taste somewhat nutty; they’re normally eaten as the filling in a taco or omelette. (source: Rough Guides.)

Per Wikipedia, Escamoles are the edible larvae and pupae of ants. They are harvested from the roots of the Agave tequilana (tequila) or Agave americana (maguey—mezcal) plants in Mexico. They are most commonly consumed in Mexico City and surrounding areas. Escamoles have been consumed in Mexico since the age of the Aztecs.They taste buttery and nutty, with a texture akin to that of cottage cheese.