20 bulletin; museum of comparative zoology. 



10. Formica fusca var. neorufibarbis Emery. 



Under the name F. neorufibarbis Pergande included both this and 

 the following variety. I believe that only his specimens from Met- 

 lakahtla, which he calls the palest form, belong to neorufibarbis, those 

 from Sitka and Kadiak being referable to the var. gelida. Mr. 

 Kusche secured several series of workers at Skagway and Ketchikan, 

 Alaska and White Horse, Yukon. The large individuals have the 

 thorax, petiole, and legs uniformly red, without traces of infuscation 

 and are exactly like those taken by myself during the summer of 1915 

 in the Canadian Rockies and the Sierra Nevada. 



11. Formica fusca var. gelida Wheeler. 



The study of a long series of workers and dealated females taken by 

 Mr. Kusche at Skagway, Nulato, Ketchikan, and in the Pynaw Mts., 

 near Rampart, Alaska, and at White Horse, Yukon, and of a few 

 workers from Seward (F. H. Whitney) and Kasiloff Lake, on the 

 Kenai Peninsula, shows that this variety cannot be satisfactorily dis- 

 tinguished from neorufibarbis except by the color of the larger workers, 

 which in gelida have the legs and thorax more or less and often deeply 

 infuscated. Darker specimens seem to pass over into the typical 

 fusca, while immature specimens are difficult to distinguish from the 

 var. marcida. 



12. Camponotus herculeanus Linne var. whymperi Forel. 



This variety is not only widely distributed through the Canadian 

 and Hudsonian zones of North America, but is said to occur also in 

 Siberia. Mr. Kusche obtained numerous worker and female speci- 

 mens from several colonies at Fort Yukon, Skagway, and Nulato, 

 Alaska and White Horse, Yukon. I have also seen specimens from 

 Kasiloff Lake, on the Kenai Peninsula (Berlin Museum) and Koyukuk 

 (W. J. Peters). The variety differs from the typical herculeanus 

 merely in the slightly longer and more abundant, subappressed hairs 

 on the tibiae. As I find this character to be inconstant on comparison 

 of American and European specimens, whymperi would seem to be an 

 insignificant if not a spurious variety. 



