Superfamily ICHNEUMONOIDEA 157 



cressoni Muesebeck and Walkley. Md. s. to Fla., w. to Kans., Nev., and Calif.; Mex. Host: 



C ylindrocopturus adspersus (Lee), Lixus scrobicollis Boh. 

 Hormius/ aciculatus Cresson, 1872. Amer. Ent. Soc, Trans. 4: 190. 9. Preocc. by Ruthe, 



1854. 

 Rhacoywtus cressoni Muesebeck and Walkley, 1951. U. S. Dept. Agr., Agr. Monog. 2, p. 



181. N. name for aciculatus Cresson. 



fasciatus (Ashmead). Md. s. to Fla., w. to Iowa and Tex. Host: Conotrachelus sp., Lixus 

 concavus Say. 



Honuiopterus fasciatus Ashmead, 1893. Amer. Ent. Soc, Trans. 20: 43. 9. 

 g^raciliformus (Viereck). Md. s. to Fla., w. to Iowa, Colo., and Ariz.; N. Dak., Alta. 



Honyiiopterus graciliformus Viereck, 1911. U. S. Natl. Mus., Proc. 40: 183. 9, S. 

 phalarus Marsh. Tex. 



Rhaconotus phalarus Marsh, 1976. Ent. Soc. Wash., Proc. 78: 401. 9. 



Genus RHOPTROCENTRUS Marshall 



Rhoptrocentrus Marshall, 1897. In Andre, Spec. Hym. Eur. Alg., v. 5 bis, p. 99. 

 Type-species: Rhoptrocentrus piceus Marshall. Monotypic. 

 piceus Marshall. Pa. s. to Fla.; Calif.; Europe. Host: Hylotrupes bajulus (L). 



Rhoptrocentrus piceus Marshall, 1897. In Andre, Spec. Hym. Eur. Alg., v. 5 bis, p. 100. 9. 



Genus SPATHIUS Nees 



Spathius Nees, 1818. Nova Acta Acad. Caes. Leop. Car. 9: 301. 



Type-species: Cryptus clavatus Panzer. Monotypic. 

 Stenophasvius Smith, 1859. Linn. Soc. London, Jour., Zool. 3: 169. 



Type-species: Stenophasmus ruficeps Smith. Monotypic. 

 Euspathius Foerster, 1862. Naturh. Ver. Rheinlande, Verb. 19: 236. Emend. 

 Rhacospathius Cameron, 1905. Spolia Zeylanica 3: 86. 



Type-species: Rhacospathius striolatus Cameron. Monotypic. 



Revision: Nixon, 1943. Roy. Ent. Soc. London, Trans. 93: 173-456 (Old World spp.). 

 — Matthews, 1970. Amer. Ent. Inst., Contr. 4(5): 1-86 (No. Amer. spp.). 



Taxonomy: Shenefelt and Marsh, 1976. Hym. Cat., part 13, p. 1386-1424 (cat. World spp.). 

 aphenges Matthews. Alta., Idaho, B. C, Wash., Oreg., Calif. Host: Conophthonis coniperda 

 (Schwarz), Ips latidens (Lee), Phloeotribus lecontei Schedl, Scolytus abietis Blkm. 

 Spathius aphenges Matthews, 1970. Amer. Ent. Inst., Contr. 4(5): 51. 9, 6. 

 benefactor Matthews. Que. s. to N. C, w. to N. Dak. and Kans. Host: Hylurgopinus rufipes 

 (Eichh.), Leperisinus aculeatus (Say), Magdalis armicollis (Say), M. barbita (Say), M. 

 inconspicua Horn, Saperda tridentata Oliv., Scolytus multistriatxis (Marsham), S. 

 nigulostis Ratz. This species has been studied extensively under the name canadensis 

 Ashmead. According to Matthews (1970), all references to Spathius reared from elm 

 refer to benefactor, not to canadensis. 

 Spathius benefactor Matthews, 1970. Amer. Ent. Inst., Contr. 4(5): 61. 9, S. 



Biology: Kaston, 1937. Conn. Agr. Expt. Sta., Bui. 396, p. 351-353. — Kaston, 1939. Conn. Agr. 

 Expt. Sta., Bui. 420, p. 33-35. —Robert, 1951. Assoc. Canad.-Fr. Adv. Sci., Ann. 17: 139-140. 

 —Robert, 1961 (1960). Ent. Soc. Que., Ann. 6: 122-143. All references are to canadensis 

 Ashmead. 

 brachyurus Ashmead. Que. s. to N. C, w. to Wis. and Tenn. Host: Dryocoetes autographus 



(Ratz.), Pissodes approximatus Hopk., P. strobi (Peck). 

 Rhopalophonis fasciatus Provancher, 1886. Addit. Corr. Faune Ent. Canada Hym., p. 129. 



9. Preocc. by Walker, 1874. 

 Spathius abdo7ninalis Riley, 1890. In Riley and Howard, U. S. Dept. Agr., Insect Life 2: 



350. Norn. nud. 

 Spathius brevicaudus Ashmead, 1892. In Hopkins, U. S. Dept. Agr., Insect Life 4: 258. 



Nom. nud. 

 Spathius brachyurus Ashmead, 1893. Canad. Ent. 25: 73. 9. 



