Cryptotendipes bullum Song & Wang, sp. nov. from Hainan Island, Oriental China is described and illustrated based on a single adult male. The species can easily be distinguished from its congeners by having a very long and slightly curved bare superior volsella with four apical setae and a prominent gonostylus, with a bulb-like inner projection medially.

Insects were collected from the surface of a suburban swimming pool (adjacent to an oak-grassland open space) in northern California over a six-year period (2014–2019). We found 338 morphospecies from 27 families of parasitic Hymenoptera. We note the uncommon taxa found and discuss the species richness of the catch and possible utility of this collection method, comparing our results to the diversity of taxa found, using conventional techniques, in two neighboring sites.

The Neotropical genus MimicoclytrinaBellamy, 2003 is revised and a new species from Venezuela, Mimicoclytrina bellamyisp. nov., is described and compared to its most closely related species. A lectotype for Acherusia tristisThomson, 1878 is designated, and the taxon is classified as a subspecies of M. piliventris (Saunders, 1869). Mimicoclytrina piliventris ssp. venezuelica (Cobos, 1980) is placed in synonymy with M. piliventris ssp. tristis (Thomson, 1878). The previously unavailable subgenus name NelsonilaCobos, 1980 is redescribed as a new subgenus Antoniolasg. nov. and a type species is designated. All species of the genus are illustrated, including type specimens. A key to all known taxa is given, together with data on distribution, biology and taxonomic position.