 The larva is a voracious predator . Within a few minutes of seizing its prey with its jaws and injecting it with venom and enzymes , it begins to suck out the digestion products . The larva is extremely sensitive to ground vibrations , the low @-@ frequency sounds made by an insect crawling across the ground ; the larva locates the source of the vibrations by the differences in timing of the arrival of waves detected by receptors , tufts of hairs on the sides of the two hindmost thoracic segments . 
