Wafer Ash ~ Ptelea trifoliata
Read an earlier post about Wafer Ash.
It's a Bee Eat Bee World.
Cleptoparasitic bees don't fashion their own nests but instead lay their eggs in nests of other ground dwelling bee species.
What's fascinating about the Sphecodes bee, is that is belongs to the insect Family Halictidae (Sweat Bees) not the cleptoparasitic subfamily of Nomadinae (Cuckoo Bees).
Cleptoparasites - Seek and Destroy
"A female of the solitary Sphecodes enters the nests of other solitary bees to lay an egg while the host female is away foraging. Once in the nest, although most other cleptoparasites do not harm the host's egg, a female Sphecodes destroys the host's egg before laying her own." (Attracting Native Pollinators)
Social Parasites - Coup d'Etat
If they're social parasites, they "enter the nest and in some way replace the queen, so that the host workers then tend and rear Sphecodes offspring." (Attracting Native Pollinators)