Superfamily ICHNEUMONOIDEA 713 



{Psilocorsis sp.)- Host: Actia interrupta Curran, Chaetophlepsis orbitalis Web., C. 

 semiothisae Brooks, Ictericophyto tibialis (Curran), tachinids, dipterous parasites. 



Mesochorus tachinae Ashmead, 1898. In Dimmock and Ashmead, Ent. Soc. Wash., Proc. 4: 

 168. 9. 

 tachypus Holmgren. Newfoundland (Labrador), w. N. W. T., and Alaska, s. to P. E. I., s. Que., 

 Ont., N. Mex., and n.w. Calif.; Europe. Ecology: Reared or presumed to have been 

 reared from parasites of the following-- Olethreutidae {Epinotia solandriana [L.], 

 Pseudexentera improbana oregonana [Wlk.], Zeirapliera sp.), Tortricidae (Acleris 

 variana [Fern.], Choristoneura occidentalis Free.), Gelechiidae {Anacampsis 

 7iiveopulvella [Cham.], Coleotechnites starki [Free.]), Geometridae {Alsophila pometaria 

 [Harris], Operophtera sp.), Lasiocampidae (Malacosoma disstria Hbn.), and sp. of 

 Noctuidae. Host: Apanteles fnmiferanae Vier., Microgaster peroneae Wly. 



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

 130. i, 9. 



Mesochorus diversicolor Viereck, 1912. U. S. Natl. Mus., Proc. 42: 149. 6,9. 

 tantillus Dasch. N. B., n. and s. Que., N. H., Ont., n. Mich., Sask., s.e. B. C. Ecology: Paratypes 

 should be presumed to have been reared from parasites of the following— 

 Tenthredinidae (Anoplonyx luteipes [Cr.]) and Geometridae (Semiothisa dispuncta 

 [Wlk.], S. "graiiitata" auct.). 



Mesochorus tantillus Dasch, 1971. Amer. Ent. Inst., Mem. 16: 164. 6,9. 

 totonacus Cresson. Ohio, s. Mich., n.e. Kans.; n. and s. Mexico. The type locality is in southern 

 Mexico. 



Mesochorus totonacus Cresson, 1872. Canad. Ent. 4: 23. "9" = 6. 



Mesochorus totanacus Cresson, 1874 (1873). Acad. Nat. Sci., Proc. 25: 388. "9" = 6. The 

 holotype is the same specimen as that of totonacus. 

 transversus Dasch. Northern Que., N. H. 



Mesochorus transversus Dasch, 1971. Amer. Ent. Inst, Mem. 16: 269. 6. 

 tumidifrons Dasch. Northern Va., n.e. Kans. Ecology: The single paratype can be presumed to 

 have been reared from a parasite of a sawfly larva. 



Mesochorus tumidifrons Dasch, 1971. Amer. Ent. Inst., Mem. 16: 214. 9. 



tundracolus Dasch. Southwestern Alaska. Ecology: The three specimens known were collected 

 on tundra at Naknek, Alaska. 

 Mesochorus tundracolus Dasch, 1971. Amer. Ent. Inst., Mem. 16: 179. 6,9. 

 ukiahensis Dasch. Northwestern Calif. Known only from the holotype. 



Mesochorus ukiahensis Dasch, 1971. Amer. Ent. Inst., Mem. 16: 227. 9. 

 unicarinatus Dasch. Que. w. to n. Yukon, s. to Md., n. Ga., Tex., and n.w. Oreg. Host: 

 Chaetophlepsis orbitalis Web. ex Lambdina fiscellaria lugubrosa (Hulst). 

 Mesochorus unicarinatus Dasch, 1971. Amer. Ent. Inst., Mem. 16: 87. 6, 9. 

 uniformis Cresson. N. S. w. to w. Yukon, s. to Ga., Tex., s. N. Mex., s. Ariz., and s. Calif.; 

 Mexico. Ecology: Reared or presumed to have been reared from parasites of the 

 following— Sphingidae {Ceratomia amyntor [Geyer]), Lymantriidae Lymantria dispar 

 [L.], Orgyia sp., 0. psedotsugata [McD.]), Noctuidae (Xylomyges perlubens Grt.), 

 Geometridae (Caripeta sp., C. angustiroata Wlk., C. divisata Wlk., Ectropis 

 crepuscularia [D. and S.], Eufidonia notataria [Wlk.], Eupithecia annulata [Hulst], 

 Glena nigHcaria [B. and McD.], Lambdina fiscellaria luguborsa [Hulst], Melanolophia 

 imitata [Wlk.], Semiothisa sp., S. sp. on Larix, S. dispuncta [Wlk.], S. oweni [Swett], S. 

 setonana [McD.], sexmaculata [Pack.], Stenoporpia sp.), Tortricidae (Acleris variana 

 [Fern.], Choristoneura fumiferana [Clem.]), Oecophoridae (Semioscopis inomata 

 Wlshm.), and Diprionidae (Neodiprion abietis [Harris], N. pinetum [Nort.]). Host: 

 Casinaria limenitidis (How.), Phobocampe pallipes (Prov.), P. unicincta (Grav.), 

 Apanteles melanoscelus (Ratz.). 

 Mesochorus uniformis Cresson, 1872. Amer. Ent. Soc, Trans. 4: 171. "9" = 9 and misdet. 



6. 

 Paniscus rufulus Provancher, 1876. Nat. Canad. 8: 328. 9 . 

 Astiphromma mexicanus Ashmead, 1894. Calif. Acad. Sci., Proc. 4: 129. 9. 



