New Discovered Insect Who Destroys Cockroach Eggs

The ensign wasp, an insect who destroys cockroach eggs, is one of the odder insects found occasionally in homes. A small insect, only 5-7 mm long, it does not sting or bites. It does not harm, and its a beneficial parasite of at least three household cockroaches. They are experts at locating not only the cockroaches themselves, but the egg cases or oothecae that cockroaches deposit.


                                     





When the female ensign wasp encounters a cockroach egg case, she first taps it with her antennae, presumably to confirm that it is an acceptable host for her egg. Then she lies down beside it and braces her legs against the ootheca. After that, she inserts her slender ovipositor into the tough ootheca and lays a single egg. After hatching, the wasp larva matures and eats dozens or more cockroach eggs inside each ootheca. No cockroaches will hatch from an egg case that has been parasitized by an ensign wasp.


                              


The name ensign wasp comes from the unique, stalked abdomen. Egg cases produced of the American cockroach make up food for the ensign wasp. If you find an ensign wasp in your home, no need to panic. It likely means that one of the larger species of cockroaches is present somewhere inside the area





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