A new host association is made for the Neotropical spider wasp Priochilus gloriosum gloriosum Cresson, which also represents the first host association for this genus. A new host association also is made for Aporinellus fasciatus Smith and additional host associations are provided for Ageniella conflicta Banks, Ageniella (Ameragenia) nr. fabricii Banks, Ageniella (Alasagenia) sp. A, Cryptochilus attenuatum Banks, Priocnemella sp. A, Agenioideus birkmanni Banks, Ammosphex silvivagus Evans, Anoplius imbellis Banks, and Tachypompilus ferrugineus ferrugineus Say. Host transportation behaviors are reported where observations were made.