6 h Canadian Arctic Expedition, 1918-18 



(PL Ill,) taken by Mr. G. H. Wilkins of the Expedition, shows the spider in its 

 natural surroundings near the mouth of its hole. 



Localities: Bernard harbour, Dolphin and Union strait, Northwest 

 Territories, from June to September. Two males from Camden bay, Alaska, 

 July 4, 1914. 



Pardosa glacialis Thorell (1872). 



This widely diffused species occurs at Bernard harbour, Northwest Terri- 

 tories, on the north coast of Alaska, and at Teller, Alaska. The forms of the 

 epigynum differ from those in other places, but differ also among themselves. 

 A female from Teller, Alaska, has the epigynum somewhat like variety brunnea 

 of New England (PL II, fig. 17). 



Pardosa groenlandica Thorell (1872). 



An adult female and several young were found at Herschel island, Yukon 

 Territory, July, 1916. It lives across Canada and southward on the mountain 

 tops of Colorado. 



Xysticus bimaculatus Emerton. 1 



Male 5 mm., female 6 mm. long. Pale with light brown and grey markings. 

 The legs are short, the first leg of the male less than one and a half times the 

 length of the body. The first and second legs are covered with fine light brown 

 spots, with some larger marks on the ends of the femur. The third and fourth 

 legs have brown markings on the ends of the joints. The cephalothorax has 

 the middle light area lightly spotted in the front half. The dark areas are 

 closely spotted with brown, darkest toward the abdomen. The abdomen is 

 marked with three or four pairs of oblique light brown spots, the edges of which 

 are irregularly spotted with dark grey, more definitely in the male than female. 

 The whole under side is lightly spotted with brown. The male palpus has the 

 tibia of usual form with a blunt outer process and a double process below, the 

 inner branch of which is slightly curved at the point (PL II, fig. 19). The palpal 

 organ is unusually complicated, the lower half of the bulb very much thickened 

 in a curved ridge that ends in a blunt tooth on the inner side. The tube is 

 short and twisted and turned away from the bulb, and under it is a small 

 sharp point. The epigynum has a simple oval opening. 



Localities: A male and female, in grass, Bernard harbour, Northwest 

 Territories, August 25, 1915, and one immature female. Bluffs at lake at Kon- 

 ganevik, Camden bay, Alaska, June 27, 1914, young male and female. Found 

 also in the Rocky mountains at Laggan, Alta., and on mount Lincoln, Colorado, 

 at 11,000 feet. 



Canadian Spiders, Conn. Acad. 1894. 



Explanation of Plate I. 



Fig. 1. Erigone arctica, palpus. 



2. Typhocracslus spetsbergensis, palpus (upper side). 



3. " " (palpal organ showing transparent appendage.) 



4. " " (side edge). 



5. Tmelicus alatus, male palpus (from above). 



6. " " " (side view). 



7. " " epigynum. 



8. Microneta maritima, mandibles. 

 9. 



10. " " palpus. 



11. Lycosa pictilis, usual markings. 



12. Lycosa pictilis, occasional variation of markings. 



