504 WHEELER. 



19. Myrmica scahrinodis Nyl. subsp. Johicornis Nyl. var. glacialis 

 Forel. 



Alberta: Vermilion Pass, type locality (Whymper); Lake Louise 

 and Moraine Lake, Valley of the Ten Peaks (Wheeler). 



British Columbia: Emerald Lake (Wheeler); Carbonate and 

 Prairie Hills, Selkirk Mts. (J. C. Bradley). 



Montana: Helena (W. M. Mann). 



Utah: Salt Lake County (R. V. Chamberlin). 



Colorado: Florissant, Ute Pass, Cheyenne Canyon and Manitou 

 (Wheeler) ; Creede Co. 8844 ft. (S. J. Hunter) ; Boulder (P. J. Schmitt) ; 

 Pikes Peak, 10,000 ft., Willow Creek and West CliflF, 7864 ft. (T. D. A. 

 Cockerell). 



New Mexico: Harvey's Ranch, Las Vegas Range, 10,000 ft. (E. L. 

 Hewett); Beulah, 8000 ft. (T. D. A. Cockerell). 



Arizona: San Francisco Mts., 13,000 ft. (W. M. Mann); Coconino 

 Forest, Grand Canyon (Wheeler). 



Forel described this form from worker specimens as a variety of the 

 typical scahrinodis, but has more recently placed it under the subsp. 

 schencki Emery. During the summer of 1915 I found the males and 

 females in many nests in British Columbia and Alberta and these 

 phases show unmistakably that glacialis must be regarded as a form 

 of lobicornis, a subspecies common in the Alps and Northern Europe 

 but not hitherto known to occur in America. The antennal scapes 

 of the male glacialis are strongly bent at the base and fully § as long 

 as the funiculus. They are therefore onl^' a little shorter than in 

 typical lobicornis. The other differences are equally insignificant. 

 The glacialis male is a little smaller and has somewhat shorter epinotal 

 teeth, the sculpture of the head and thorax is somewhat feebler so that 

 the surface is more shining. The female is also somewhat smaller 

 than the female of the typical form, its head and thorax are more 

 shining and less coarsely sculptured, and the thorax and pedicel are 

 darker, the angles at the base of the antennal scapes decidedly smaller. 

 The worker specimens from the Grand Canyon, San Francisco Mts. 

 and Boulder have the antennal lobes large and more flattened, much 

 as in the typical lobicornis. The specimens from Helena are consid- 

 erably paler and colored like the eastern sabulctl, but the greater length 

 of the antennal scape in the male shows that they should be placed with 

 lobicornis, although they may represent a distinct variety. 



20. Myrmica scahrinodis subsp. schencki Emery xnv. tahoensis var. 

 nov. 



