FOOD Sl'PPT.Y 



49 



phenomenon of ptedogenetic, or precocious multiplication 

 known as polyembryony in which a single egg of the parasite 



Fio 23 A Hymenopterous parasite (Svalangia mutcidarum) of the houseBy 

 and other related flies. The female Spalangia is shown thrusting her ovipc«itor 

 into the puparium of the fly. Below are shown the larva and pupa which de- 

 velop within the puparium. (.\fter Pink us.) 



deposited in the host egg gives rise to a series of larvae (often 

 several hundred) which develop within the host larva. Still 



