594 Hymenoptera in America North of Mexico 



lanceolatus (Davis). N. Y., Ont., Colo., w. Wash. 



Holmgrenia lanceolata Davis, 1898 (1897). Amer. Ent. Soc, Trans. 24: 294. S, ?. 



Genus ATITHASUS Foerstcr 



Atithasus Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 210. 



Type-species: Atithasus stellarius Davis. By subsequent monotypy from inclusion 

 by Davis, 1898. 



A single species is known. 



bimaculatus (Ashmead). N. H., Pa., Va., Ind., Ill, Iowa, e. Kans., Tex. 



Grypocentrus bimaculatus Ashmead, 1896. Amer. Ent. Soc, Trans. 23: 199. 9. 

 Atithasus stellarius Davis, 1898 (1897). Amer. Ent. Soc, Trans. 24: 291. 6,9. 



Genus BARYTARBES Foerstcr 



Polytrera Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 202. 



Type-species: Mesoleius (Barytarbus) laeviuscuius Thomson. Desig. by Viereck, 

 1914 from two species included by Thomson, 1892. 

 Isodiaeta Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 204. 



Type-species: Tryphon seg^iieiitaritis Gravenhorst. Monotypically included and 

 desig. by Perkins, 1962. The type-species is Gravenhorst's identification of 

 Ichneunton segmentarius Fabricius. 

 Hybristes Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 210. Preocc. by Reichenbach, 

 1850. 



Type-species: Tryphon adpropiiiquator Gravenhorst. Monotypically included and 

 desig. by Townes, Momoi, and Townes, 1965. 

 Barytarbes Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 212. 



Type-species: Tryphon colon Gravenhorst. Desig. by Viereck, 1914 from five species 

 included by Thomson, 1883. 

 Barytarbus Thomson, 1883. Opusc Ent. 9: 931. Emend. 

 Polytreres Thomson, 1892. Opusc. Ent. 17: 1873. Emend. 



This is a Holarctic genus of moderate size. 



Taxonomy: Townes, 1970 (1969). Amer. Ent. Inst., Mem. 13: 116 (Nearctic spp. assigned). 



antennatus (provancher). Que., N. Y.? 



Mesoleius antennatus Provancher, 1877. Nat. Canad. 9: 15. 9. Barron's (1975) rejection of 



the lectotype selected by Gahan and Rohwer (1918) appears to be valid inasmuch as 



Provancher did not indicate that he had more than one specimen. 

 Mesoleius antennatus Provancher, 1879. Nat. Canad. 11: 260. 9. Preocc. by Provancher, 



1877; Provancher's 1879 description is apparently an inadvertent second description as a 



new species of the same specimen he described in 1877. 



Taxonomy: Gahan and Rohwer, 1918. Canad. Ent. 50: 31. —Barron, 1975. Nat. Canad. 102: 



426. 

 compos (Davis). "Canada," Mich. 



Alexeter compos Davis, 1898 (1897). Amer. Ent. Soc, Trans. 24: 321. S. 

 honestus (Cresson). Que., N. H., Conn., N. Y., N. J., Pa., 111. 



Mesoleptus honest^is Cresson, 1868. Amer. Ent. Soc, Trans. 2: 98. S, 9. 



Mesoleptus albifrons Cresson, 1868. Amer. Ent. Soc, Trans. 2: 98. "9" = cJ. 



provancher! (Cushman). Que., N. Y., Pa., Mich. 



Mesoleptus variabilis Provancher, 1883. Nat. Canad. 14: 7. 9. Preocc. by Provancher, 1875. 

 Mesoleptus provancheri Cushman, 1917. Ent. Soc. Wash., Proc 19: 165. N. name for M. 

 variabilis Provancher, 1883. 



Genus ALEXETER Foerster 



Alexeter Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 199. 



