ICHNEUMON-FLIES — GELINAE ! MESOSTENINI 359 



Apical 0.5 or more of male hind basitarsus whitish; female fiagellum with a 

 median white band; range: Atlantic Ocean to 100° west longitude. 



lib. albitarsis aLbitarsis (Cresson) 



11a. Trychosis albitarsis peratra, new subspecies 



The punctation of head, body, and legs averages a little less fine 

 and dense than in the subspecies albitarsis and the flagellar segments 

 average a little shorter. The most reliable differences, however, are 

 in color. 



Differs in color from the subspecies albitarsis in having the female 

 flagellum entirely black, male hind basitarsus dark brown with its 

 apical 0.4 or less ivory, female hind tarsus always entirely brown, wings 

 with a definite brown tinge, femora of female alwaj^s ferruginous, and 

 abdomen more extensively ferruginous. The first abdominal segment 

 usually has only its basal half infuscate, tergite 5 is always ferruginous, 

 and tergites 6-8 vary from fuscous to entirely ferruginous. 



Type: 9^ Gold Lake, Sierra Co., Calif., July 29, 1921, C. L. Fox 

 Collection (San Francisco). 



Paratypes: 9, on Abies lasiocarpa, Lorna, B.C., July 2, 1925, H. 

 Richmond (Ottawa). 9, Big Basin, Calif., July 21, 1948, C. A. 

 Downing (Davis). 9, Donner Pass, Calif., Aug. 1, 1948, H., M., G., 

 and D. Townes (Townes). cf, Glen Alpine, Tahoe, Calif., July 14, 

 1915, E. P. Van Duzee (Berkeley). 9, Leland Meadow, Tuolumne 

 Co., Calif., July 16, 1957, J. W. MacSwain (Townes). d", Sagehen 

 near Hobart Mills, Calif., July 9, 1954, G. Schaefers (Berkeley). 9, 

 Yosemite Canyon, Calif., July 30, 1933 (Davis), cf", near Estes Park, 

 Colo., June 12, 1948, H., M., G., D., and J. Townes (Townes). cf , 

 Moscow Mt., Idaho, July 7, 1918, A. L. Melander (Cambridge). 9, 

 Mount Constitution, Wash., July 1909 (Cambridge), cf, Mount 

 Rainier, Wash., July 4, 1934, Bryant (San Francisco), cf, San Juan 

 Island, Wash., July 1-7, 1909, W. M. Mann (Washington). 9, Sol 

 Due Hot Springs, Clallam Co., Wash., June 20, 1936, E. C. Van Dyke 

 (San Francisco). 9, Summerland Trail, Mount Rainier, Wash., July 

 24, 1924, A. L. Melander (Townes). 



This subspecies ranges from the Rocky Mountains to the Pacific 

 Ocean, in the Transition and Canadian zones. 



lib. Trychosis albitarsis albitarsis (Cresson) 



Cryptus albitarsis Cresson, 1864, Proc. Ent. Soc. Philadelphia, vol. 3, p. 300; cf . 

 Type: (f, Delaware (Philadelphia). 



Male: Black. First segment and basal 0.7 it of second segment of 

 maxillary palpus dark bro^vn, the rest of the palpus usually white 

 except that fifth segment is pale brown; labial palpus brown; tegula 

 black; front and middle first trochanters often with a white stripe in 



