1904.] NATURAL SCIENCES OF PHILADELPHIA. 265 



c. 2. — First eye row shorter than the second, labium 



not longer than wide, sides of the head 



vertical, head projecting forward beyond 



the clypeus. 



/. 1. — Metatarsus IV equal in length to the 



patella and tibia combined, dorsal eye 



area fully one-third the length of the 



cephalothorax Trab.ea. 



/. 2. — jMetatarsus IV shorter than patella and 

 tibia combined, dorsal eye area less 

 than one-quarter the length of the 



cephalothorax Aulonia. 



c. 2. — Posterior spinnerets little or not longer than the an- 

 terior, chelicera usually robust with the anterior 

 border arched. 

 d. 1. — Leg I shorter than IV by not more than one-half 

 the length of tarsus I, and thicker than the other 



legs, Geolycosa. 



d. 2. — Leg I without such characteristics. 



e. 1. — Cephalothorax highest at the middle and the 

 sides of the head oblique, first eye row 

 fully or almost as broad as the second, legs 

 usually short with short spines, Trochosa. 

 e. 2. — Cephalothorax highest in the cephalic region, 

 first eye row usuallj^ shorter than the sec- 

 ond, legs usually long with long spines, 



Lycosa . 



Genus SOSILAUS Simon, 1898a. 



I have not seen this genus, which was created by Simon for a species 

 (S. spinigcr) from Louisiana. His diagnosis is: "Cephalothorax 

 postice convexus, antice longe declivis et attenuatus, facie sat angusta, 

 obliqua atque obtusa. Oculi quatuor antici inter se subcontigui, in 

 lineam leviter recurvam, medii lateralibus saltern duplo majores. 

 Oculi ser, 2 mediocres, inter se appropinquati, spatium transversum 

 oculorum linea antica multo angustius occupantes. Pars labialis 

 longior quam latior, attenuata et obtusa. Pedes sat longi, metatarsis 

 tarsisque tenuibus longis hand scopulatis, tibiis anticis aculeis pronis 

 5-5 metatarsis aculeis similibus 3-3 subtus armatis, aculeis que laterali- 

 b\is minoribus munitis." 



Genus AULONIA C. Koch, 1848. 

 Aulonia humicola (Montg.). Pi. XX, fig. 33. 



Pirata humicolus Montgomery. 1902, 1903. 

 IPirata mimitus Emerton, 1SS.5. 



Numerous specimens from Pennsylvania and New Jersey. 



£'?/<?s.— First row shorter than the second on each side by the full 



