
No. 461.) NORTH AMERICAN INVERTEBRATES. 317 
Legs III and IV much smaller than I and II; tarsi I and Il not 
voip ; hairs of body, simple, scattered, and erect. (Misumenin®) 7. 
2. Leg II very much longer than I; posterior eye-row almost straight ; 
cephalothorax broad Ebo. 
Leg II but little ione vidt 1; josteta eye-row very vüdoby recurved 
3. Five pairs of spines under tibia I and II; P. M. E. nearer to P. S. E. 
than to each other . i Philodromoides. 
Less than 5-5 spines de tibiæ 1 adl Huc i . : ch. 
4. P. M. E. farther apart than from P. S. E. ; abdomen not very slender ; 
leg IV shorter than leg I . Philodromus. 
P. M. E. not nearer P. S. E. din to sach other! or if barely so then 
leg IV is longer than I 5. 
. M. E. much nearer to iib itus "im io. p. s. E. ; BR long 
xii weg leg IV longer than I. ; . Tibellus. 
. about as near P. S. E. as to iai other 4 ; 2 
6. Leg IV ea than leg I . ; ; : : i en 
Leg IV longer than leg I . Thanatus.. 
7. Legs I and II with spines only det bie and metatarsi, at most with 
one or two very minute ones elsewhere. . 3 i 8 
Legs I and II with distinct spines diciliee à 10. 
8. Abdomen furnished behind with two prominent denken seoiaclions 
Thomi 
Abdomen without two projections behind ; DK 
9. A ridge between eyerows . : i : ; ; . Runcinia. 
No ridge between eye-rows Misumena. 
10. Abdomen high and pointed behind; clypeus eg: : tüberde at P. S. 
E. much larger than at A. . Tmarus. 
Abdomen broadly rounded tehtid dida more vati; tubercles of 
S. E. subequal in sizè . ; : DIS 
11. Cephalothorax very flat ; di cultus seein : : Coriarachne. 
Cephalothorax moderately high 
12. Abdomen, cephalothorax, and lies pale whitish or i yali, but little 
marked except bands on legs of males Misumessus. 
e t or cephalothorax and legs, ek, or heavily marked with 
‘> 
13. Quia a M. E. higher ihan brad: bise I We II with 2-2 
Oz 
spine zyptila. 
Dini a M. * not bigher than wi : iR 
14. Eyes of lower row equidistant; A. M. E. larger than P. M. E. ; tibie 
I and II with 3-3 spines . | Syren. 
A. M. E. nearer to A. S. E. han to cach abe, not larger than 
P. M. E. ; tibia I and II with 4-4 or 5-5 spines . ; . Xysticus. 
