320 THE AMERICAN NATURALIST. [Vor. XXXIX. 
2. Leg I plainly thicker than the other u cephalothorax (gue slightly 
constricted . Peckhamia. 
Leg I as dente as Giorn ; ; : : i i s 3. 

Fic, 22.— Attide; vu. cephalo- Fic. 23. — Attide ; two types of 
thorax, and spinnerets. spine-arrangement under tibia I. 
3. Cephalothorax and abdomen very strongly constricted ; apical joints of 
female palpus slender . : Synemosyna. 
Cephalothorax and abdomen but little ansehe apical joints of 
female palpus enlarge ; i . Myrmarachne. 
4. Eyes in four rows ; ede green spiders x bog Fantasia 
Eyes in three rows . i 
5. No spines under tibia I, or at most tq one or two iati ones 6. 
Several spines under tibia 9. 
6. Cephalic part very long, reaching ‘tact to bébé ot adohi; leg I 
plainly thickened : Homalattus. 
ephalothorax ones bid helo middle to bal A ; : 7. 
7. Leg I plainly heavier than others 4 : : : . 
Leg I slender, as the others . F : : : i Salticus.! 
8. No spines on hind legs . : \ i ; i . Admestina. 
A few distinct spines on hind le i . Eremattus. 
9. Leg III as long as or longer than IV, at least | in males; usually spines 
on sides of patellæ III and IV ; coxæ I separate by more than width of 
lip; 2-2 or 3-3 spines under tibia I; legs usually quite hairy . 3% 
Leg III plainly shorter than IV Lid 
10. Ocular area occupying fully one half of the RN 9 the dorsal 
eyes situated at its greatest width, and projecting laterally 
Zygoballus. 
. Ocular area occupying less than one half of the cephalothorax ; or if 
so, then the STN is not plainly broader at dorsal eyes than else- 
where . i . H. 
11. Tibia I with 4—4 spines below (or leas), the base one sofi inner series is 
nearer to base than the first third of tibial length : 
! Latreille in 1810 fixed type of this genus as S. scenicus. 
