318 THE AMERICAN NATURALIST. [Vor. XXXIX. 
SPARASSIDE. 
1. P. S. E. in a row with anterigr eyes; tarsal claws smooth; cephalo- 
thorax Wr flat à . Selenops. 
. behind anterior row; tarsal dies töbet ; cephalothorax 
plainly ea i ; - M 
P. S. E. much ho en P. M. E. : .  Heteropoda. 
P. S. E. barely, if at dens larger than P. M. E. ; : : Olios. 
PISAURIDE. 
Anterior eye-row recurved ; quadrangle of M. E. broader behind than 
high ; clypeus about as high as quadrangle of M. E. R Dolomedes. 
Anterior eye-row straight; quadrangle of M. E. not broader behind 
than high ; clypeus not as high as quadrangle of M. E. . . Pisaurina. 
PODOPHTHALMIDE. 
Area outlined by four anterior eyes is much wider than long 
Thanatidius. 
Area outlined by four anterior eyes is as long as wide Maypacius. 
CTENIDE. 
A. S. E. nearer to A. M. E. than to either P. S. E. or P. M. E. 
Titiotus. 
A. S. E. nearer to P. M. E. or to P. S. E. than to A. M. E. Ctenus.l 
LYCOSIDÆ. 

FiG. 20.— Lycosidz ; Mm cephalotho- Fic. 2:.— Oxyopidz ; face and 
rax, and spinnerets diui thorax. 
l This includes Cupiennius and Anahita ; they differ from Ctenus only = 
minute or slight characters difficult of verification. Titiotus is unknown to me 
