298 THE AMERICAN NATURALIST. (VoL. XXXIX. 
with flat cephalothorax, maxilla curved around lip, and the posterior, 
middle eyes elongate and curved ; eyes not in two transverse rows 
Urocteide. 
No circle of bent hairs around tip of abdomen . , I es 
5. With a cribellum and calamistrum in female . i ; oe 
Without cribellum and calamistrum . j : EY T 
6. Eyes always in three or four transverse rows ; eyes of next to last row 
extremely small, the middle eyes of first row (or the first row in Lys- 
somanes) are very much larger than other eyes ; clypeus always vertical, 
never sloping ; cephalothorax never very broad, e rather short ; jump- 
ing spiders . Attide. 
Eyes in two or Wed i rows; Fides in dde rows, BÀ the middle of 
first row are not greatly larger than any others, and those of second 
row not greatly smaller than others . 
7. Each tarsus with three claws: spinning nie: or iere eyes are dini in 
three rows 1 : : i i à 
Each tarsus iu but ı two ides: never spinning webs; eyes nidi in 
three rows; S. E.rarely contiguous ; never with but two spinnerets 8. 
8. Posterior eye-row so much procurved as to represent two rows, the P. 
E. oval; maxille long and tapering; fang of mandibles very long; 
trochanters longer than usual, anterior coxze much longer than others 
Prodidomidz. 
Without such combination of en : p 
9. P. M. E. large, closer to the small A. S. E. than di uid are to die A. 
M. E., which are also small; tarsi with en cephalothorax not 
broad an flat, legs rather lticiide ; . Ctenide. 
P. M. E. not as close to A. S. E. as lather are to A. M. E., or if Ys 
then eyes nearly equal in size 
10. P. M. E. black ; legs I and II Bod asi is, articulated so En 
the anterior surface is directed upward. Second pair of legs nearly 
always as long as the fourth, or longer, and about as large and long as 
leg I; spinnerets not prominent; cephalothorax pu broad p 
abdomen often depressed 
. M. E. pale, only A. M. E. idu: bes I "d II not ees 
leg II usually noticeably shorter or nal than either leg IV orleg I; 
cephalothorax longer t3 
11. A. M. E. some distance from cly peu margin, tarsi vee not spial ; 
spiders of medium size . Thomiside. 
A. M. E. close to clypeal ER » cephalothorax dettes, tarsi heavily 
scopulate, mostly large spiders 12. 
I2. Tarsal claws pectinate, maxillae not inclined over E very ree spiders 
arasside. 
Tarsal claws smooth, maxillz inclined over lip ; spiders of Sada size 
odariidz. 
13. Lower spinnerets distinctly separated, rather long and prominent ; 

