214 U. S. NATIONAL MUSEUM BULLETIN 216 



Specimens (23 cf, 369) : From Alberta (Banff) ; Arizona (near Alpine, 

 Oak Creek Canyon, and Parker Creek in the Sierra Ancha); British 

 Columbia ("Atila," Bear Lake, Kaslo, Robson, and Wellington); 

 California (Carson Pass, Dardanelle, Donner Pass, Echo Lake in 

 Eldorado Co., Fish Camp, Gold Lake in Sierra Co., Lake Tahoe, 

 Leevining, Strawberry in El Dorado Co., and Webber Lake in Nevada 

 Co.); Colorado (Boulder Co. at 9,500 ft., near Estes Park, Gothic, 

 Granite Peaks Camp at Bayfield at 9,000 ft., Morley, and Silverton 

 at 9,800 ft.); Idaho (Cataldo, Lewiston, and Wallace at 3,000 ft.); 

 Montana (Thompson); New Mexico (Cimarron at 6,800 ft. and Rio 

 Ruidoso in the Sierra Blanca at about 6,500 and 8,200 ft.); Oregon 

 (Joseph); and Washington (Easton and Peshastin). 



Collection dates are from midspring into the fall. The earlier 

 and later recorded dates of capture are: May 4 at Parker Creek, 

 Sierra Ancha, Ariz.; May 18, 19, and 21 at Oak Creek Canyon, Ariz.; 

 May 21 at Robson, B. C.j Sept. 26 at Peshastin, Wash.; Oct. 18 at 

 Lewiston, Idaho; and Oct. 22 at Robson, B. C. 



This subspecies occurs in and west of the Rocky Mountains, in the 

 Canadian and Transition zones. It is adult throughout the growing 

 season. 



lc. Perithous mediator mediator (Fabricius) 



Pimpla mediator Fabricius, 1804, Systema piezatorum, p. 117; ?. Type: 9, 

 Moravia (location unknown). 



This is the subspecies of Europe. The ferruginous on the meso- 

 scutum and mesopleurum covers nearly all of these structures, the 

 female hind tibia and tarsus is almost uniformly dark fulvous with 

 only weak infuscation at apex of tibia and of the tarsal segments, 

 the female fore and middle coxae are without ivory marking, and the 

 female abdomen has the punctures exceptionally small and sparse. 

 The male is rather similar to that of P. m. neomexicanus but with 

 abdominal punctures a little smaller and sparser, and very narrow 

 tyloids on about the eighth to eighteenth segments. 



Specimens: 6cT, 79, from England and Germany. 



Id. Perithous mediator japonicus Uchida, new status 



Perithous japonicus Uchida, 1928, Journ. Fac. Agr. Hokkaido Univ., vol. 25, 

 p. 91; d\ ?. Types: 2d 1 , 3? from several Japanese localities (Sapporo). 



This is the Japanese subspecies, characterized by entire lack of 

 ferruginous areas on the thorax, and dark, almost black, hind tibia 

 and tarsus. 



Specimens : 69 from Japan, including one compared by the authors 

 with Uchida's types. 



