Chlorion aerarium, commonly known as the steel-blue cricket hunter, is a species of thread-waisted wasps in the family Sphecidae.Sharkey M.J. (2007). Phylogeny and Classification of Hymenoptera."Phylogenetic relationships among superfamilies of Hymenoptera", Sharkey M.J., Carpenter J.M., Vilhelmsen L., et al. 2012. Cladistics 28(1): 80-112. It is similar in shape and colour to the blue mud dauber species, Chalybion californicum, which often overlaps in range.
References
Further reading
NCBI Taxonomy Browser, Chlorion aerarium