1921] Canadian and Arctic Spiders 167 



This is described by Emerton in Canadian Spiders, Trans. Con- 

 necticut Acad., 1894, as one of the varieties of P. glacialis. It 

 occurs in Greenland, Labrador, and Arctic Canada. It is usually 

 larger than the typical gJaciaUs and lighter in color, with much 

 bright yellow on the legs, especially the under sides of femora 

 and coxae. In the paper referred to. Fig 2a, Plate IV, represents 

 this species, and 2b its epig}aium. The palpal organ differs little 

 from glacialis and its relatives, but the male palpus is more slender 

 and not much darker in color at the end than at the base, without 

 the close black hairs which are characteristic of glacialis and 

 irunnea. 



Lycosa exasperans, Cambridge, Ann. Mag. Xat. Hist., London, 

 1877, from English Exploring Expedition of 1875-76. 



This species has been identified by Strand in Fauna Arctica, 

 1906, with L. alpigera ^ L. insignita, Thorell. It is, however, 

 distinguished from that species by the dorsal markings. The mid- 

 dle stripe of the cephalothorax in exasperans narrows in front be- 

 tween the eyes, widens behind the eyes, and narrows again in its 

 posterior half. In insignita it widens regularly toward the front, 

 so as to enclose the whole eye area. The abdomen of exasperans 

 has usually a series of dark marks in the middle and a row of 

 hlack and white spots at the sides. L. insignita has a large white 

 middle mark surrounded by a black iDorder and the spots on the 

 sides are indistinct. 



L. exasperans was found by the Crocker Land Expedition, 1917, 

 at Saunders Island on the west coast of Greenland. 



L. exasperans resembles closely L. pictilis, Emerton, which has 

 similar markings, but is larger, more largely marked with orange 

 hairs, and has a more angular epigynum. L. pictilis is found on 

 the Mt. Washington range above trees up to the highest summits, 

 ■on the coast of Labrador, and on the arctic coast of Canada. The 

 Labrador specimens unfortunately are all immature. 



L. mutdbilis and L. poecila, described by Kulczynski, from Si- 

 beria, appear to reseml)le closely exasperans and pictilis, and it 

 seems prol)able that comparison of a larger number of specimens 

 would show that all these are one species extending along the arctic 

 coast from Siberia to Greenland and south through Labrador to 

 the White Mountains. 



