1600 Hymenoptera in America North of Mexico 



texanus (Malloch). Tex. (Brownsville). 



Pse7iia texana Malloch. 1933. U. S. Natl. Mus., Proc. 82 (26): 56. 9,6. 

 tibialis (Cresson). D. C, Va., S. C, Tenn., Ala., La., Mo., Tex. 



Mimesa tibialis Cresson, 1872. Amer. Ent. Soc, Trans. 4: 227. 9, <S. 



Genus PSENULUS Kohl 



Psenulus Kohl, 1896. K. K. Naturhist. Hofmus., Ann. 11: 254, 293. 



Type-species: Psen fuscipennis Dahlbom. Desig. by Ashmead, 1899. 

 Neofoxia Viereck, 1901. Amer. Ent. Soc, Trans. 27: 338. 



Type-species: Psen atrata (Fabricius) of Panzer. Orig. desig. 

 Stenomellinus Schulz, 1911. Zool. Ann. 4: 142. 



Type-species: Psen dilectus Saussure. Monotypic. 

 Psenulus subg. Eopsenulus Gussakovskij, 1934. Mushi 7: 84. 



Type-species: Psenulus (Eopsenulus) iwatai Gussakovskij. Orig. desig. 

 Nipponopsen Yasumatsu, 1938. Mushi 11: 84. 



Type-species: Nipponopsen anomoneurae Yasumatsu. Orig. desig. 



These wasps nest in pre-existing cavities in twigs, stems and grass, and also in abandoned 

 beetle borings in wood. Prey records of North American species are Aphididae and Psyllidae. 

 Some extralimital species prey upon Delphacidae and Cicadellidae. 



Revision: Krombein, 1950. Brooklyn Ent. Soc, Bui. 45: 35-40 (N. Amer. spp.). 

 alienus (Krombein). Calif. Ecology: Nests in borings in Sambucus stems. Prey: Psyllidae sp. 

 adults. 

 Diodontus (Diodontus) alienus Krombein, 1950. Brooklyn Ent. Soc, Bui. 45: 38. 9. 



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

 frontalis (Fox). Colo., N. Mex., Ariz., Utah, Calif., Wash. 



Psen frontalis Fox, 1898. Amer. Ent. Soc, Trans. 25: 4. 9 . 



Diodontus occidentalis Malloch, 1933. U. S. Natl. Mus., Proc. 82 (26): 5. 9. Preocc 

 Diodontus hesperus Pate, 1944. Canad. Ent. 76: 133. N. name. 

 pallipes parenosas (Pate). N. H. to Ga., Utah, Calif. Ecology: Nests in borings in wood, in old 

 anobiid borings, and in canes of Rubus. Parasite: Pyemotes ventricosus (Newp.); 

 Lackerbaueria krombeini Baker; Chrysididae sp., possibly Omalus. Prey: Drepanaphis 

 acerifoliae (Thos.) adults, D. sp. nymphs, Therioaphis sp. ? nymphs, Macrosiphuni sp. 

 nymphs. Typical pallipes (Panz.) and other subspecies occur in the Palaearctic Region. 

 Diodontus parenosas Pate, 1944. Canad. Ent. 76: 133. N. name for Malloch's misdet. of 

 trisulcus (Fox). 



Taxonomy: Krombein, 1950. Brooklyn Ent. Soc, Bui. 45: 37 (lectotype desig.). —Evans, 1959. 

 Amer. Ent. Soc, Trans. 85: 144-145, figs. 13-19 (larva). 



Biology: Krombein, 1951. U. S. Dept. Agr., Agr. Monog. 2: 958 (nest). —Krombein, 1955. 

 Brooklyn Ent. Soc, Bui. 50: 15-16 (nest, prey). —Krombein, 1958. Biol. Soc. Wash., Proc 

 71: 22 (nest, prey). —Krombein, 1967. Trap-nesting wasps and bees, pp. 232-234 (nest, 

 prey, life cycle, cocoon, parasites). 

 trisulcus (Fox). N. H. to Tenn., Mo., Kans. Ecology: Nests in elder stems. Parasite: Omalus 

 iridescens (Nort.). 

 Psen trisulcus Fox, 1898. Amer. Ent. Soc, Trans. 25: 5. 9. 



Diodontus corusanigrens Rohwer, 1920. U. S. Natl. Mus., Proc. 57: 228. "9" = i. 

 Diodontxcs sulcatns Malloch, 1933. U. S. Natl. Mus., Proc. 82 (26): 6. 9. 



Taxonomy: Pate, 1944. Canad. Ent. 76: 133. 



Biology: Rau, 1922. Acad. Sci. St. Louis, Trans. 24: 21-22 (nest). 



Subfamily PEMPHREDONINAE 



Revision: Fox, 1892. Amer. Ent. Soc, Trans. 19: 307-326 (N. Amer. spp.; not reUable for 

 identification). 



