Tertiary Spiders and Opilionids. 



267 



copulatory apparatus a deeply forked organ which probably repre- 

 sents both the embolus and conductor. 



Figure 2,2. — Tcihncus robiistus n. sp. Specimen No. 16412 (119). x 5. 



Measurements of legs: First leg, femur — 2.7 mm., tibia with 

 patella — 3.2 mm., metatarsus with tarsus — 3.9 mm., total 9.8 mm. 

 Second leg, femur — 2.5 mm., tibia with patella — 2.7 mm., metatar- 

 sus with tarsus — 3.1 mm., total — 8.3 mm. Third leg, femur — 

 1.4 mm., tibia with patella — 1.6 mm., metatarsus with tarsus — 

 2.0 mm., total — 5.0 mm. Fourth leg, total — 7.0 mm. 



Genus Epcira Walckenaer. 



Scudder has described six distinct species from Florissant and 

 I have added two new species. All these species are undoubtedly 

 close to recent spiders grouped under the cohors Araneus which 

 notwithstanding the splendid efforts of the late Frederick P. 



