428 Hymenoptera in America North of Mexico 



Type-species: Xetitophya fallax Foerster. Desig. by Ashmead, 1900 from two 

 species included by Foerster, 1876. 

 Polyrhembia Foerster, 1868. Naturh. Ver. Rheinlande, Verb. 25: 189. 



Type-species: Heyniteles tenebricosus Gravenhorst. Included and desig. by Foerster, 

 1876. 

 Xestophya Foerster, 1876. Naturh. Ver. Rheinlande, Verb. 33: 27. Emend. 



Townes (1970) said S(ilp7ius is a moderately large genus, known from the Holarctic and 

 Neotropic regions. 



Taxonomy: Townes, 1970 (1969). Amer. Ent. Inst., Mem. 12: 106. 

 gagates (Gravenhorst). Que. s. to N. C, w. to Alaska and Calif.; Honduras, Chile; Europe. 



Host: Fannia canicularif; (L.). 

 Ichneionon gagates Gravenhorst, 1807. Vergl. Uebers. Zool. Systeme, p. 263. [female]. 

 StilpnuH aniericanus Cresson, 1868. Amer. Ent. Soc, Trans. 2: 95. S, 9. 

 Megastylim politus Provancher, 1875. Nat. Canad. 7: 331. 6. 

 Hewiteles orbicularis Provancher, 1879. Nat. Canad. 11 (no. 124): 123. "d" = 9. 

 Stilpnus anthoniyidiperda Viereck, 1912. U. S. Natl. Mus., Proc. 42: 644. 6, 9. 

 StilpnuH gagates var. Robinsoni Roman, 1922. In Skottsberg, Nat. Hist. Juan Fernandez 



and Easter Isl, v. 3, p. 293. 9. 



Taxonomy: Townes and Townes, 1966. Amer. Ent. Inst., Mem. 8: 56 (syn.). —Townes, 1970 

 (1969). Amer. Ent. Inst., Mem. 12: 106 (syn.). 



Biology: Legner, 1966. Jour. Econ. Ent. 59: 999. 

 laevis Provancher. Que. 



Stilpnm laevis Provancher, 1882. Nat. Canad. 13: 332. 9. 



Stilpus levis Dalla Torre, 1902. Cat. Hym., v. 3, p. 738. Emend. 

 tenebricosus (Gravenhorst). Greenland, Alaska; Europe. 



Heiiiiteles tenebricosus Gravenhorst, 1829. Ichn. Europaea, v. 2, p. 785. 6. 



Ichneumon nitidulator Zetterstedt, 1838. Insecta Lapponica ... Hym., p. 362. "6" = 9. 



Taxonomy: Roman, 1918. Arkiv for Zool. 12 (2): 30-31 (syn.). 



Genus MESOLEPTUS Gravenhorst 



Mesolepttis Gravenhorst, 1829. Ichn. Europaea, v. 2, p. 3. 



Type-species: Ichneumon laevigatus Gravenhorst. Desig. by Curtis, 1837. 

 Exolytus Holmgren, 1859 (1858). Svenska Vetensk.-Akad., Ofvers af ... Forhandl. 15: 328. 



Type-species: Ichneumon laevigatus Gravenhorst. Monotypic and orig. desig. 

 Exolytus Foerster, 1868. Naturh. Ver. Rheinlande, Verb. 25: 189. Preocc. by Holmgren, 

 1858. 



Type-species: Ichneumon laevigatus Gravenhorst. Included and desig. by Foerster, 

 1876. 



Gravenhorst's concept of Mesoleptus included elongate Ichneumonidae of diverse affinities. 

 The species placed in Mesoleptus by Provancher and Cresson were of comparable diversity, but 

 most European authors restricted the appHcation of the name to a group of species now in the 

 Ctenopelmatinae: Euryproctini. 



borealis (Davis). "Hudson Bay Territory." 



Exolytus borealis Davis, 1898 (1897). Amer. Ent. Soc, Trans. 24: 355. "cJ" = 9. 



davisii (Dalla Torre). Colo. 



Exolytus petiolaris Davis, 1898 (1897). Amer. Ent. Soc, Trans. 24: 355. 6. Preocc in 



Mesoleptus by Thomson, 1884. 

 Exolytus davisii Dalla Torre, 1902. Cat. Hym., v. 3, p. 727. N. name for E. petiolaris Davis. 

 declivus (Provancher). Que., Ont., N. Y., Oreg. Host: Sepedon fuscipenyiis Loew, Pherbiella 

 sclioe)iherri niaculata (Cr.). 

 Hemiteles declivus Provancher, 1886. Addit. Corr. Faune Ent. Canada Hym., p. 60. 6, 9. 

 Atractodes sepedontis Ashmead, 1901. In Needham and Betten, N. Y. State Mus. Bui. 47: 

 588. 9. 



Taxonomy: Barron, 1975. Nat. Canad. 102: 459 (lectotype selected). 



