Cryptocheilus placitus Banks, 1910:122, ♀.Fedor, Lee Co., Texas (leg. Birkmann). - Townes, 1957Townes, H. 1957. Nearctic wasps of the subfamilies Pepsinae and Ceropalinae. Bulletin of the United States National Museum 209:1-286.:184 (listed). - As Ageniella placita placita: - Townes, 1957Townes, H. 1957. Nearctic wasps of the subfamilies Pepsinae and Ceropalinae. Bulletin of the United States National Museum 209:1-286.:184 (listed); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution). - As Priocnemis placitus: - Banks, 1919Banks, N. 1919. The Psammocharidae of western North America. Bull. Mus. Comp. Zool. 63:229-248. (distribution), 245 (key, listed). - As Priophanes placitus: - Banks, 1944Banks, N. 1944. Psammocharidae (spider-wasps): Notes and descriptions. Bulletin of the Museum of Comparative Zoology 94 (4):165-187.:174 (comb. nov.).
Pseudagenia apicipennis Banks, 1910:123, ♂.Fedor, Lee Co., Texas (leg. Birkmann). - Townes, 1957Townes, H. 1957. Nearctic wasps of the subfamilies Pepsinae and Ceropalinae. Bulletin of the United States National Museum 209:1-286.:184 ( listed as synonym of Ageniella placita placita (Banks, 1910)); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1540 ( listed as synonym of Ageniella placita placita (Banks, 1910)). - As Ageniella apicipennis: - Banks, 1944Banks, N. 1944. Psammocharidae (spider-wasps): Notes and descriptions. Bulletin of the Museum of Comparative Zoology 94 (4):165-187.:178 (key male).