424 J. H. JEmerton — Canadian Spiders. 



species, and as Thorell suggests in his description of i. iracunda, the 

 same as JL. grcenlandica, described by him in 1872. 



In life, this spider is deep black with the markings in bright 

 white hairs. In alcohol the hairs are usually rubbed off or faded 

 and only the markings of the skin can be traced. There is consider- 

 able variation in size, some becoming adult when not more than 

 three-quarters as large as others. The markings are pretty constant 

 but much like several other smaller species. The lateral marks of 

 the cephalothorax are broken, usually into three spots of various 

 shapes and sizes. PI. iv, fig. 1. The middle spot of the cephalo- 

 thorax extends but little in front of the dorsal groove. The mark- 

 ings of the abdomen are generally obscure; the middle spot is small 

 and there are traces of two rows of white spots at the sides. 



The legs of the females are ringed with black and gray and have 

 long black spines. In the male the legs are darker and not so 

 plainly ringed, and the male palpi are very black. 



The epigynum is large and conspicuous and varies little in shape. 

 It is narrow in front and wide behind, having an outline resembling, 

 as Thorell says, a vase or decanter. PI. iv, figs. Ic, Id, \e, 1/", show 

 common forms of the epigynum, the variation being mainly in the 

 width and in the shape of the middle septum. The epigynum is 

 larger than that of P. glacialis, and the middle septum is narrower 

 and straighter. It does not much resemble that of any other species. 



The palpal organs (PI. iv, fig. la) are large and very uniform in 

 shape. They resemble those of glacialis, but the basal hook is 

 smaller and sharper, and the middle appendages larger. 



The female Ijycosa sinistra Thor., from Colorado, has the thorax 

 almost entirely black without the spots along the sides, and with 

 only a trace of the middle light mark. The abdomen and legs also 

 have less light markings than usual. 



Greenland, as far north as Disco Island. The coast of Labrador, 

 from Strawberry Harbor southward. Anticosti. Magdalen Islands. 

 Lake of the Woods. Rocky Mts., near Laggan. Washington Ter- 

 ritory. Portland, Oregon. Summit of Mt. Washington. 



Pardosa glacialis. 



Lycosa glacialis Thor., Ofvers. af Yet. Acad. Forhandl., xxix, 1872; Spiders from 

 Greenland. 



L. glacialis Thor., Notice of Spiders of the Polaris PZxpedition, in American Natu- 

 ralist, June, 1878. 



In this species the liglit stripes at the sides of the cephalothorax 

 are entire, instead of being broken into a row of spots, as in P. 



