90 HYMENOPTERA OF AMERICA NORTH OF MEXICO 



Exyston nigroscutum Davis. Remove from syn. Not assignable to subg. 



{teste Mason, 1959, p. 1112). 

 Exyston horeotis Davis. Remove from syn. A valid sp. in subg. Anec- 

 physis Foerster {teste Mason, 1959, p. 1082). 



venustus (Cresson). Placed in subg. Exyston Schiodte. 



Exyston politus Davis. Remove from syn. A valid species in subg. Exys- 

 ton Schiodte. 



EXYSTON subgenus ANECPHYSIS Foerster 



Place on p. 230 before Exyston (Exyston) Schiodte (teste Mason, 

 1959, p. 1067). Subgeneric placement of all species teste Mason, 

 1959, pp. 1071-1097. 



*ater Mason. B. C, Wash., Oreg. 



Exyston (Anecphysis) ater Mason, 1959. Canad. Jour. Zool. 37: 1070, 

 1095. $, ?. 



*austel!i Mason. Mass. to N.C. 



Exyston (Anecphysis) austelli Mason, 1959. Canad. Jour. Zool. 37: 1069, 

 1078. $, ?. 



boreotis Davis. Mich, to Cont. Divide in Transit, and Canad. Zones. 



♦californicus Mason. Alaska, Oreg., Calif., Colo., Wyo., Mont., Idaho, Alta. 



Exyston (Anecphysis) calif ornicus Mason, 1959. Canad. Jour. Zool. 37: 

 1070, 1093. 9, 5. 



*hadros Mason. Alta., Sask., Colo., Minn., Mich. 



Exyston (Anecphysis) hadros Mason, 1959. Canad. Jour. Zool. 37: 1069, 

 1080. $, 9. 



*Iophotos Mason. N. W. T., Sask., Alta., B. C, Wash., Calif. 



Exyston (Anecphysis) lophotos Mason, 1959. Canad. Jour. Zool. 37: 



1070, 1091. $, ?. 



marginatus Provancher. Transcont. in Transit., Canad., and Huds. Zones. A 

 valid species {teste Mason, 19.59, pp. 1071-1073). 

 Anecphysis curvineura Davis (syn. teste Mason, 1959, p. 1071). 

 Exyston nigreo Davis (syn. teste Mason, 1959, p. 1071). 



*reniformis Mason. Colo., Alta.. B. C, Oreg., Calif. 



Exyston (Anecphysis) reniformis Mason, 1959. Canad. Jour. Zool. 37: 



1070, 1089. $, 9. 



speciosus Davis. Alta., Idaho, Mont., Wyo. 



*spinuIosus Mason. Alaska, Yukon, N. W. T., Wash., Sask., Wyo., N. Dak., 

 S. Dak., Minn., Iowa, Kans. (Misdet. as contractus in Catalog, 

 teste Mason, 1959, p. 1086). 

 Exyston (Anecphysis) spinulosus Mason, 1959. Canad. Jour. Zool. 37: 

 1069, 1086. $, 9. 



*tectus Mason. N. B., P.E.I, to N. C. and Tenn., west to Colo., B. C, Wash., 

 Oreg., also Calif., Ariz. Hosts: Pristiphora hivittata (Nort.), P. 

 idiota (Nort.), P. sycophanta Walsh. 

 Exyston (Anecphysis) tectus Mason, 1959. Canad. Jour. Zool. 37: 1069, 

 1073. $, 9. 



variatus Provancher. Atlantic to Cont. Divide; B. C. Canad. Zone to U. 

 Austr. Zone. 



EXYSTON subgenus EXYSTON Schiodte, pp. 230-231 



Subgeneric placement of all species, teste Mason, 1959, pp. 1097-1110. 



*chamaeleon Mason. Yukon, B. C, Wash., Oreg., Calif., Ariz., N. Mex., 

 Utah, Colo., Alta., Sask., S. Dak., Ont. 

 Exyston (Exyston) chamaeleon Mason, 1959. Canad. Jour. Zool. 37: 

 1069, 1099. 9, $. 



