706 Hymenoptera in America North of Mexico 



Mesochorus strenuus Holmgren, 1860 (1858). Svenska Vetensk.-Akad. Handl. (n. f.). 2 (8): 



119. cJ, 9.N. syn. 

 Plectiscus pleuralis Provancher, 1875. Nat. Canad. 7: 330. "9" = <?. N. syn. 

 Plectiscus provancheri Dalla Torre, 1901. Cat. Hym., v. 3, p. 24. Unnecessary n. name for 



P. pleuralis Provancher; preocc. secondarily only by virtue of a bibliographic error 



which led Dalla Torre to erroneously place Tryplion pleuralis Cresson, 1864, in 



Plectiscus. N. syn. 

 Mesochorus orcae Ashmead, 1902. Wash. Acad. Sci., Proc. 4: 239. S. N. syn. 

 Astiphromma kiotense Uchida, 1933. Insecta Matsumurana 8: 57. 3, 9. N. syn. 

 Astiphromma sachalinense Uchida, 1933. Insecta Matsumurana 8: 57. 9. N. syn. 



Taxonomy: Townes, 1939. Canad. Ent. 71: 96. — Townes, Momoi, and Townes, 1965. Amer. 

 Ent. Inst., Mem. 5: 341 (syn.). -Fitton, 1976. Brit. Mus. (Nat. Hist.) Ent., Bui. 32: 323 

 (lectotypes selected for Curtis names). 



Genus MESOCHORUS Gravenhorst 



Mesochorus Gravenhorst, 1829. Ichn. Europaea, v. 2, p. 960. 



Type-species: Mesochorus spleudiduius Gravenhorst. Desig. by Curtis, 1833. 

 Edrisa Cameron, 1907. Tijdschr. v. Ent. 50: 111. 



Type-species: Edrisa piliconiis Cameron. Monotypic. 

 Zamesochorus Viereck, 1912. U. S. Natl. Mus., Proc. 42: 152. 



Type-species: Zamesochorus orientalis Viereck. Monotypic and orig. desig. 

 Cryptochorus Aubert, 1965. Soc. Ent. de Mulhouse, Bui. 21: 22. 



Type-species: Cryptochorus obliterator Aubert. Monotypic and orig. desig. 



This very large genus is worldwide in distribution. 



acuminatus Thomson. N. B. w. to w. Ont., s. to Md. and 111. Ecology: Reared or presumed to 

 have been reared from parasites of the following- Sphingidae (Cressonia juglandis 

 [Smith], Darapsa versicolor [Harris], Manduca sp., Sphiyix kalmiae [J. E. S.]) and 

 Notodontidae (Heterocampa guttivitta [Wlk.], Pheosia rimosa Pack.). Host: Apanteles 

 sp., Microplitis sp. 



Mesochorus acuiniiiatus Thomson, 1885. Soc. Ent. de France, Ann. (6) 5: 343. S. 

 agilis Cresson. Newfoundland (Labrador) w. to Alaska, s. to N. Y., Mich., N. Mex., Ariz., and 

 n.e. Calif.; Greenland; Europe; n. Mexico. Ecology: Reared from larval parasites of 

 Coleoptera (Curculionidae)and presumed to have been reared from a parasite of 

 Crambidia casta (Pack.) (Lepidoptera, Arctiidae). Host: Bathyplectes curculionis 

 (Thom.), Dimophora sp. 



Mesochorus agilis Cresson, 1865. Ent. Soc. Phila., Proc. 4: 266. 9. 



Mesochorus nigriceps Thomson, 1885 Soc. Ent. de France, Ann. (6) 5: 334. 6, 9. Preocc. by 

 Brischke, 1880. 



Mesochorus punctipleuris Thomson, 1885. Soc. Ent. de France, Ann. (6) 5: 334. 6,9. 



Mesochorus Thomsonii Dalla Torre, 1901. Cat. Hym., v. 3, p. 59. N. name for nigriceps 

 Thomson. 

 aiaskensis Dasch. Southwestern Alaska. 



Mesochorus alaske7isis Dasch, 1971. Amer. Ent. Inst, Mem. 16: 109. 9. 

 americanus Cresson. Newfoundland (insular) and n. Que. w. to s.w. Alaska, s. to Fla., s. Tex., 

 Ariz., and Oreg.; n.e. Asia, Europe. Ecology: Reared or presumed to have been reared 

 from parasites of the following Lepidoptera- Thecla sp., Colias philodice Godt., 

 Acronicta oblinita (J. E. S.)?, Amathes c-nignim (L.), Aidograpka califomica (Spey.), 

 Eurois sp., Peridroma saucia (Hbn.), Pseudaletia unipuncta (Haw.), Spodoptera 

 omithogalli (Gn.), Hemaris sp., Manduca sp., M. quinquemaculata (Haw.), M. sexta 

 (Joh.), Ctenucha virginica (Charp.), Euchaetias egle (Drury), Caripeta divisata Wlk., 

 Semiothisa "granitata" auct., S. sexmaculata (Pack.), Bucculatrix canadensisella Cham. 

 Host: Apanteles sp., A. congregatus (Say), A. glomeratus (L.), A. laeviceps Ash., A. 

 rufocoxalis Riley, A. scitulus Riley, A. xylinus (Say), Meteorus sp. 



Mesochorus americaiius Cresson, 1872. Canad. Ent. 4: 23. 9. 



Mesochorus scituhis Cresson, 1872. Canad. Ent. 4: 24. 6, 9. 



