these check easy prey to me as a level 60 drg/rdm, when I kill them they give about 15-26 xp not sure how high that makes them, but that's all the info I have
From these and other "lower level" antlions I've managed to get Scarlet Stone (sold for 15k on Cerberus at that time) and Antlion Jaw. Both seemingly quite rare drop as I and another killed about 10-20 of these with only 1 drop of each. PT: WAR70/NIN35 and WHM65/BLM32, Me being the WHM ^.^