How does the reproductive morphology of the parasitic female differ from a standard queen's initiation duties?

She needs only to infiltrate a host nest and deposit her egg, potentially disabling the host queen.

The reproductive morphology and social roles of the female parasitic bumblebee have been drastically altered by selection pressures favoring nest invasion. A standard social queen must invest considerable time and energy into establishing a colony, which involves foraging, building, and provisioning a brood mass from the very beginning. In contrast, the parasitic female's primary function upon emergence is achieving successful infiltration of an already established host nest. Once inside, her reproductive output is achieved by depositing her egg, often requiring her to physically overcome or chemically incapacitate the resident host queen to ensure her own larva's dominance and acceptance.