Superfamily TENTHREDINOIDEA 103 



Type-species: Taxovus inferentia Norton. Orig. desig. 

 Monosoma Viereck, 1910. N. J. State Mus., Ann. Rpt. 1909, p. 583. Emend. 



A small genus with two species, one Nearctic the other Palaearctic. 



inferentia (Norton). Newfoundland to N. C. w. to Minn., 111. Host: Alniis. 

 Poecilosfo7na inferentia Norton, 1868. Amer. Ent. Soc, Trans. 2: 224. 6. 

 Strongylogaster albosectus Provancher, 1878. Nat. Canad. 10: 168. 9. 

 Monophadnus lineatus Kirby, 1882. List Hym. Brit. Mus., v. 1, p. 177. 9. A questionable 



synonym. 

 Monosoma inferentia var. andronosa Ross, 1932. Canad. Ent. 64: 249. 9. 



Genus MONOSTEGIA Costa 



Monostegia Costa, 1859. Fauna del Regno di Napoli, Imen., pt. 3, p. 60. 



Type-species: Tenthredo (Allantus) luteola Klug. Desig. by Ross, 1951. 

 Poecilosoma subg. Nematoceros Konow, 1896. Wien. Ent. Ztg. 15: 52, 54. 

 Type-species: Tenthredo (Allaiitus) luteola Klug. Monotypic. 

 abdominalis (Fabricius). Que., Ont. to N. J., Pa. w. to Ohio; Europe to Siberia. Probably 

 introduced. Host: Lysiniacliia numyyiularia, L. vulgaris, L. terrestris, Anagallis. 

 Tenthredo abdominalis Fabricius, 1798. Sup. Ent. System., p. 216. 9. 

 Tenthredo (Allantus) luteola Klug, 1814. Mag. Gesell. Naturf. Freunde Berlin 8: 48. 

 Monostegia martini MacGillivray, 1908. Canad. Ent. 40: 366. 9. 

 Monostegia nearctica Rohwer, 1912. U. S. Natl. Mus., Proc. 43: 209. 9, cJ. 



Biology: Price, 1970. Canad. Ent. 102: 491-495. 



Genus AMETASTEGIA Costa 



Ametastegia Costa, 1882. Accad. delle Sci. Fis. e Mat. Napoli, Rend. 21(10): 198. 



Type-species: Ametastegia fulvipes Costa. Monotypic. 

 Aomodyctium Ashmead, 1898. Canad. Ent. 30: 309. No included species. 



Type-species: Strongylogaster abyiortnis Provancher. Desig. by Rohwer, 1911. 

 Protemphytus Rohwer, 1909. Canad. Ent. 41: 92. 



Type-species: Emphytus coloradensis Weldon. Monotypic. 

 Emphytina Rohwer, 1911. U. S. Natl. Mus., Proc. 41: 399. 



Type-species: Emphytina pnlchella Rohwer. Orig. desig. 

 Simple7nphytus MacGillivray, 1914. Canad. Ent. 46: 363. 



Type-species: Simple7nphytus pacificus MacGillivray. Monotypic. 

 Unitaxonus MacGillivray, 1921. Psyche 28: 32. 



Type-species: Uyiitaxonus repentinus MacGillivray. Orig. desig. 



Species of this holarctic genus feed on herbaceous plants. On maturing, larvae bore into soft 

 substances to form a pupal cell. This secondary host may be apples, other fruits, soft wood, or 

 pith of other plants. Such records as hosts for species of this genus do not constitute the true 

 host on which the larvae feed. 



Revision: Ross, 1937. Arb. uber Morph. u. Taxonom. Ent. 4: 84-91. 

 aperta (Norton). Newfoundland to N. C. w. to Mich., Colo. 



Tenthredo (Emphytus) aperta Harris, 1835. In Hitchcock, Rpt. Geol. Mineral. Bot. Zool. 



Mass., p. 583. Nom. nud. 

 Emphytus apertus Norton, 1861. Boston Nat. Hist. Soc, Proc. 8: 155. 9. 

 Emphytus leucostoina Rohwer, 1908. N. Y. Ent. Soc, Jour. 16: 110. 9. Preocc. by Costa, 



1890. 

 Emphytina plesia Rohwer, 1911. U. S. Natl. Mus., Proc 41: 402. N. name. 

 articulata (Klug). Que., Maine to Fla. w. to Minn., Iowa, Ark., Tex. Host: Rumex, Polygonum. 

 Tenthredo (Emphytus) articulatus Klug, 1814. Mag. Gesell. Naturf. Freunde Berlin 8: 284. 



6. 

 Dolenis inomatus Say, 1824. In Keating, Narr. Long's 2nd Exped., v. 2, (App.) p. 319. 9. 

 Emphytus halitus MacGillivray, 1923. 111. Univ. Bui. 20(50): 14. 9. 



Taxonomy: Smith, 1973. Ent. Soc. Wash., Proc. 75: 29. 



