6 H Canadian Arctic Expedition, 1913-18 
(PI. 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 hrunnea 
of New England (PI. 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.^ 
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 l)lunt outer process and a double process below, the 
inner branch of which is slightly curved at the point (PI. 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. Erignne arctica, palpu.s. 
2. T ijphocraeslus spetsbergensis, palpus (upper side). 
3. " " (palpal organ showing transparent appendage.) 
4. " " (side edge). 
5. Tmeticus alatus, male palpus (from above). 
6. " " " (side view). 
7. " " epigynum. 
<S. Microneta maritima, mandibles. 
9. 
10. " " palpus. 
11. Lycosa pidilis, usual markings. 
12. Lycosa pidilis, occasional variation of markings. 
