266 Alexander Pctrunkcvitch, 



of the greater size of its first and second femora as compared with 

 those of the third and fourth leg. The ahdomen is broken off 

 near its tij) and the total length of the spider may be therefore 

 given only approximately as 7.8 mm. The carapace is longer than 

 wide, narrower in front, widest in posterior third, with a distinct 

 longitudinal groove. The eyes are indiscernible. An interesting 

 feature of the two anterior pairs of legs is the considerable differ- 

 ence in the diameter of the end of the tibia and the base of the 

 metatarsus. There can be no doubt that the fourth leg was longer 

 than the third and the legs are therefore in order 1243. 



^Measurements of legs : First leg, femur — 4 mm., tibia with 

 patella — 4 mm., metatarsus with tarsus — 5 mm., total 13 mm. 

 Second leg, femur 3.4 mm., tibia with patella — 3.8 mm., metatar- 

 sus with tarsus — 3.8 mm., total — 11 mm. Third leg — femur — 

 2.5 m., tibia with patella — 2.5 mm., metatarsus with tarsus — 

 2.5 mm., total — 7.5 mm. Fourth leg, femur — 2.6 mm., tibia with 

 patella — 2.5 mm. 



There are numerous heavy spines on all legs, and legs and body 

 are clothed with short, simple, brown hair. 



The pedipalpi show a large copulatory apparatus the details of 

 which cannot be made out but the outward appearance of which 

 reminds that of recent Epeiridae. 



Tethneus robustus n. sp. {Text figure 32). 



One male from Florissant. No. 16412 (119) in the Scudder 

 Collection of the Museum of Comparative Zoology of Harvard 

 University. 



The specimen presents the dorsal surface, shows the character- 

 istic difference in the size of the femora, but is on the whole rather 

 poorly preserved. 



Total length 6 mm. Carapace oval, slightly narrower in front 

 than behind, 2.4 mm., long, 1.8 mm. wide. The four median eyes 

 alone are preserved. They are round, equal in size and the quad- 

 rangle is almost square. Fegs in order 1243, those of the first 

 and second pair nmch heavier and provided with numerous spines. 

 Tliere is also sini])le l)r(»\vn JKiir on body and legs. The pedipalpi 

 are rather unusually well preserved although the details naturally 

 cannot be made out. Nevertheless one may discern in the right 



