The Spiders collected by the Canadian Arctic Expedition, 



1913-18. 



By J. H. Emerton. 



This collection includes thirteen species, three of which are described as 

 new. Two of these are minute spiders, living under loose stones along the 

 shore, and the third is a large Lycosa, li^'ing in la'rge numbers among the low 

 plants of the tundra. Of the other ten species, three have been found by earlier 

 explorers in Greenland, Spitzbergen, or Siberia, and appear to be exclusi%>^ely 

 Arctic; the rest have been found much farther south. The four species from 

 Nome and Teller, Alaska, all occur in the White mountains of New Hampshire, 

 and two of them at various stations across the continent and south into the 

 United States. Lycosa pidilis, found at Bernard harbour, has long been known 

 in the upper parts of the White mountains, and is also found on the coast of 

 Labrador. _ Xysticus Mmaculatus, found also at Bernard harbour. Dolphin and 

 Union strait. Northwest Territories, is known from the Rocky mountains near 

 Banff and from the mountains of Colorado. The two species of Pardosa are 

 widely distributed over the northern part of the continent. 



All types described in this paper are in the Canadian National Collection 

 of Insects, Ottawa. The specimens were collected by Mr. F. Johansen. 



Erigone arctica White (1852) .1 



This resembles the common Erigone dentigera of the New England coast. 

 The palpus (PI. I, fig. 1) has the same general length and proportions, but the 

 process of the patella is somewhat longer, and the end of the tibia wider, with 

 the inner and outer points sharper and more divergent than in dentigera. It 

 has been found at Cornwallis island and in Spitzbergen. 



Locality: Cockburn point. Dolphin and Union strait. Northwest Terri- 

 tory, autumn of 1914. 



Typhocraestus spetsbergensis (Thor.) Kulczynski.^ 



This is 2 mm. long, and grey, without any markings, the legs very little 

 Ughter than the thorax. The male palpus has the tibia a little longer than wide 

 and slightly widened at the end. The front edge is nearly straight except a 

 small tooth on the outer corner, which is slightly curved inward at the point (PI. 

 I, figs. 2 and 4.) The tarsal hook is small and curved in more than half a circle, 

 the basal end showing along the edge of the tarsus when seen froOi above. The 

 palpal organ is distorted in all the specimens, but shows the slender trans- 

 parent appendage and the other details as figured by Kulczynski (PI. I, fig. 3). 



Locality: Three males and two young from Spy island (Jones islands, 

 known also as Thetis islands), on the Arctic coast of Alaska, September 3, 

 1913, under green algae on the wet seashore. Found also by the English Polar 

 Expedition of 187.5-6 in latitude 82° 33' and in Siberia and Spitzbergen. 



Tmeticus alatus, n. sp. 



A little over 2 mm. long and pale yellow without markings like pale indi- 

 viduals of Tmeticus flaveolus Banks and T. longisetosus Em. The male palpus 

 seen from above has the tibia longer than wide With a large curved tooth on 



1 Cambridge, Annals an4 Magazine of Natural History, 1877. 



2 Memoirs Acad. Sf Petersburg, 1902. Strand, Fauna Arctica, 1906. Erigone spetsbergensis thoieW, 

 Swedish Acad., 1872. 



