yup, bot flies.
a very common, and very real problem for most missionaries in tropical areas. the flies themselves dont lay eggs in anything living, the problem is that mosquitos, fleas, chiggers, and other parasitic insects will carry them and then transfer them to a new host as they feed. in reality, the only danger they pose is that its very easy in those warm, wet, tropical climates for the holes they use for air to become infected once the larvae leaves the host. and thats never good.
interesting fact, because of their size and their appetite, bot fly maggots are oft sought after in throd world contries for the purpose of fighting infection in open wounds. maggots only eat rotting meat and decay, and so they are ideally suited for the cleansing of infection usually due to improper treatment of war wounds.