Superfamily BETHYLOIDEA 1223 



iridescens (Norton). Throughout Canada andU. S., in Canadian, Transition and Austral Zones. 



Host: Stigmus i. inordinatus Fox, S. americanus Pack., Psenulus trisulcus (Fox), 



Passaloecus sp. 

 Elampus iridescens Norton, 1879. Amer. Ent. Soc, Trans. 7: 234. 6. 

 Elampus marginatus Provancher. 1881. Nat. Canad. 12: 304. 9. Preocc. 



Biology: Davidson, 1895. Psyche 7: 271 (host record). — Krombein, 1958. U. S. Dept. Agr., 

 Monog. 2, Sup. 1: 94. —Krombein, 1967. Trap-nesting wasps and bees, pp. 442-443 (life 

 history). 



Genus OMALUS Subgenus PSEUDOMALUS Ashmead 



Pseudomalus Ashmead, 1902. Canad. Ent. 34: 229. 



Type-species: Onialus semicircularis Aaron. Monotypic. 

 auratus (Linnaeus). N. Y. south to S. C, Ohio, Ind.; widely distributed in the Palearctic 

 Region. Undoubtedly adventive in U. S. Host: Pemphredon I. lethifer (Shuck.), 

 Passaloecus turionum Dahlb.; Perithous divinator (Rossi). 

 Sphex aurata Linnaeus, 1758. Syst. Nat., ed. 10, p. 572. 

 Hedyckrum sinuosum Say, 1828. Contrib. Maclur. Lye. Phila. 1: 82. 9. 



Taxonomy: Krombein, 1959. Brooklyn Ent. Soc, Bui. 54: 95-96. 



Biology: Thomas, 1962. Ent. News 73: 217-218. 

 janus (Haldeman). Canada and U. S. south to Calif., Ariz., N. C, chiefly in Canadian and 

 Transition Zones. Host: Pemphredon concolor Say, P. errans Roh. 

 Hedychrum janus Haldeman, 1844. Acad. Nat. Sci. Phila., Proc. 1: 53. 9. 

 Elampus coruscans Norton, 1879. Amer. Ent. Soc, Trans. 7: 234. 9. 

 Omalus comiscans (!) Aaron, 1885. Amer. Ent. Soc, Trans. 12: 214. 



Biology: Parker and Bohart, 1966. Pan-Pacific Ent. 42: 94 (host record). 

 purpuratus (Provancher). Alaska, Canada and U. S. south to Calif., Ariz, and Ga. Host: 

 Stigmus americanus Pack., Pemphredon I. lethifer (Shuck.), P. harbecki Roh. ?, 

 Passaloecus cuspidatus Sm. 

 Elampus purpuratus Provancher, 1881. Nat. Canad. 12: 302. 9. 

 Elaynpus purpurascens (!) Provancher, 1881. Nat. Canad. 12: 303. 

 Omalus {Pseudomalus) macswaini Bohart and Campos, 1960. Ent. Soc. Amer., Ann. 53: 



244, fig. 22. d , 9 . N. syn. (W. R. M. Mason). 



Biology: Krombein, 1960. Ent. News 71: 32-33 (host record). —Parker and Bohart. 1966. 

 Pan-Pacific Ent. 42: 94 (host record). —Evans, 1973. Great Basin Nat. 33: 155 (host). 



semicircularis Aaron. Colo., Nev. 



Omalus se7nicircularis Aaron, 1885. Amer. Ent. Soc, Trans. 12: 215. 6. 

 trilobatus Bohart and Campos. B. C. and Idaho south to Calif., Ariz, and Colo., in Canadian, 

 Transition and Upper Sonoran Zones. Host: Pemphredon giffardi (Roh.). 



Omalus (Pseudomalus) trilobatus Bohart and Campos, 1960. Ent. Soc. Amer., Ann. 53: 



245, figs. 4, 15,25,28. 6,9. 



Biology: Parker and Bohart, 1966. Pan-Pacific Ent. 42: 94 (host record). 

 Genus OMALUS Subgenus DIPLORRHOS Aaron 



Diplorrhos Aaron, 1885. Amer. Ent. Soc, Trans. 12: 216. 



Type-species: Diplorrhos plicatus Aaron. Monotypic. 

 cressoni (Aaron). Oreg., Calif., Ariz., Colo., Utah, Mont., Nebr. Host: Diodontus occidentalis 

 Fox, Pemphredon giffardi (Roh.), Stigmus i. inordinatus Fox, Passaloecus cuspidatus 

 Sm. 

 Elampus cressoni Aaron, 1885. Amer. Ent. Soc, Trans. 12: 215. cJ, 9. 



Biology: Powell, 1964. Wasmann Jour. Biol. 21: 172-173 (host record). —Parker and Bohart, 

 1966. Pan-Pacific Ent. 42: 94-95 (host record). —Evans, 1973. Great Basin Nat. 33: 155 



(host). 



