Including all specimens from the Araba Bioscan and Black Mountain Litter projects.
Specimens of Williamsita Pate, 1947
unranked: Biota
kingdom: Animalia
phylum: Arthropoda
class: Insecta
order: Hymenoptera
superfamily: Apoidea
family: Crabronidae
subfamily: Crabroninae
tribe: Crabronini
subtribe: Crabronina Latreille, 1802
genus: Williamsita Pate, 1947