FORMICID^) OF THE EXPEDITION 



BY THEODORE PERGANDE 



THE present paper is based upon a small collection of Alaska 

 Formicidae, made by Professor Trevor Kincaid while connected 

 with the Harriman Expedition during the summer of 1899, and 

 is especially interesting on account of the close relationship of 

 most of the species to those of our northwestern States. 



Subfamily CAMPONOTINI. 

 Formica neorufibarbis Em. 

 Formica neorufibarbis EM., Zool. Jahrb. Jena, p. 660, 1899. 



The series representing this species are all workers, and were ob- 

 tained in the following localities: Sitka, i specimen; Metlakahtla, 

 5 specimens ; and Kadiak, 34 specimens. Those from the latter lo- 

 cality were found in a rotten log. 



The species is quite variable as to coloration; the palest forms, 

 from Metlakahtla, are absolutely identical with those found in Colo- 

 rado, Dakota, and Oregon, while the darker specimens agree more or 

 less closely with forms occurring in Colorado, Utah, and some of the 

 far northwestern States. 

 Lasius niger L. subsp., sitkaensis subsp. nov. 



Worker: Length about 4 mm. Head and abdomen dark brown, 

 the posterior edge of the abdominal segments whitish or more or less 

 [519] (us) 



