J. H, Emerton — Canadian Spiders. 411 



same size, the lateral eyes a little lower than the others and nearly 

 touching the laterals of the front row. 



The legs are long and slender, the first pair longest and nearly 

 twice as long as the body. The legs are white faintly marked with 

 gray, darkest toward the distal ends of the joints. PI. i, fig. 5. 



The abdomen is gray with a herring-bone marking of light spots 

 in the middle. 



The mandibles are twice the height of the head in length, thick- 

 ened at the base and slightly hollowed on the inner side beyond the 

 middle and at the end of this hollow are two teeth, beyond which 

 the mandible tapers toward the claw. The claw is long and slender 

 and two-thirds as long as the rest of the mandible. PI. i, fig. 

 5a, 6b. 



The male palpus has the femur long and the patella and tibia 

 short, each about as wide as long. The patella has no appendages 

 and the tibia has at the distal end three short spines that surround 

 the twisted end of the palpal organ which has been described in 

 other species as a process of the tibia itself. 



The three processes of the tibia consist of a pointed spine extend- 

 ing across the end of the tibia with its point on the outer side, PI. 

 I, fig.*5a, and a pair of short processes under it on the outer side 

 that appear to take the place of the two-spined process of the tibia 

 in Dictyna. Between these processes projects the tip of the palpal 

 organ. 



The palpal organ is flat and circular, the tube showing as a black 

 line all around it. On the outer side Ijegins a large flat appendage 

 as in Dictyna^ the end of which appears to be twisted with the free 

 end of the tube forming the spiral that extends through to the back 

 of the tibia. PI. i, fig. 5c, bd. 



The genus Lathys Simon, 1884, is JLethia Menge, 1869, and Lethia 

 Thorell, European Spiders, ISVO. 



Rocky Mts., near Laggan. 



Tegenaria brevis Em., New England Drassidae, Agalenidae and Dysderidse, 1890. 

 Gaspe. Mt. Washington. Massachusetts. Connecticut. 



Tegenaria derhamii (Scopoli) Thor,, 18 "73. 



Emerton, New Eng. Agalenidse, 1890. 

 T. civilis Blackwall, 1861. 

 T. domestica Simon, 1876, 



Gaspe. A common house spider in N. America and Europe. 

 Mentioned by Blackwall in a list of Canadian spiders from Prof. 

 Potter, in Ann. and Mag. of Nat. Hist., 1846. 



