502 WHEELER. 



9. Myrviccina graminicola subsp. aniericana var. brevispinosa 

 Emery. 



In distribution this form is similar to the preceding. I have taken 

 it as far west as New Braunfcls, Texas, and have seen specimens col- 

 lected by Mr. E. S. Tucker at Piano in the same state. 



10. Myrmecina graminicola subsp. texana Wheeler. 



Known only from Austin, Texas, where I found it many years ago 

 in moist places in the canyons of the Edwards Plateau. 



11. Myrmica brevinodis Emery. 



The typical form of this species is common in the Transition Zone of 

 Colorado, about Colorado Springs, Denver, Boulder, Buena Vista, etc. 



12. Myrmica brevinodis var. brevispinosa \Mieeler. 

 Known from New Mexico and Colorado. 



13. Myrmica brevinodis var. frigida Forel. 



The types of this variety were taken by Whymper in the Ice River 

 Valley, British Columbia (5000 ft.). 



14. Myrmica brevinodis var. sidcinodoides Emery. 



British Columbia: Hector, Carbonate and Spillimachen R., Selkirk 

 Mts. (C. J. Bradley); Field and Yoho Pass, Emerald Lake (Wheeler). 



Alberta: Lake Louise (Wheeler). 



Colorado: Rico, 10,000 ft. and Hayden Peak, 10,000 ft. (E. J. 

 Osier); Boulder and Ward (W. W. Bobbins); Lost Lake, Eldora, 

 9500 ft. (D. M. Andrews). 



California: Lake Tahoe, 6000 ft. (Wheeler). 



This \^ariety is so much like the typical European M. sulcinodis 

 Nyl. that one is inclined to regard brevicornis as merely a subspecies. 

 The form described by Forel as brevinodis var. lohymperi from Vermil- 

 ion Pass, Alberta, is, so far as I am able to judge from two cotypes 

 recei\'ed from Prof. Forel, merely sidcinodoides. For a description and 

 further citations of localities of this variety from Utah, Colorado and 

 New Mexico, see my revision of the forms of brevinodis in Bull. Wis. 

 Nat. Hist. Soc. 5, 1907, p. 73 et seq. The workers from Lake Tahoe 

 have the epinotal spines rather short and perceptibly curved down- 

 ward at the tips. It does not seem desirable to regard them as repre- 

 senting a distinct variety. 



