PROCEEDINGS 



OF THE 



WASHINGTON ACADEMY OF SCIENCES 



Vol. IV, pp. 87-116. [Plates iv-viii.] March 27, 1902. 



PAPERS FROM THE HARRIMAN ALASKA 

 EXPEDITION. 



XXVII. 



APTERYGOTA. 



By Justus Watson Folsom. 

 University of Illinois. 



This paper deals with the Collembola and Thysanura collected 



in Alaska in June and July, 1899, by Professor Trevor Kincaid, 



of the Harriman Expedition, with the addition of a few forms 



collected by him in 1897. These are especially welcome as 



nothing has been published hitherto concerning the Collembola 



of Alaska, and because, with three exceptions, all of Professor 



Kincaid's species are either new or little known. Moreover, 



they suggest interesting problems in geographic distribution, 



a subject yet in its infancy, as regards this group. Fourteen 



forms are here described as follows : 



Neanura gigantea Tull. Entomobrya kincaidi sp. nov. 



Neamira ornata sp. nov. Tofnocerus niger Boiirl., type. 



Anurida amorita sp. nov. Tofnocerus niger Bourl., var. 



AfJioriira octopunctata (Tull.) arcticus Schott. 



Aphorura detitata sp. nov. Totnocerus niger Bourl., var. 



Isoto7na jimetaria (L.) Tull. americanus Schott. 



Isotoma viridis Bourl., type. Papirius pahnatus sp. nov. 



Isoto7na viridis Bourl., var. Machilis arctica sp. nov. 

 arctica Schott. 



Types of the above species and subspecies have been de- 

 posited in the United States National Museum, and all the 

 Harriman specimens retain the numbers of the original labels. 

 Proc. Wash. Acad. Sci., March, 1902. (87) 



