300 THE AMERICAN NATURALIST. [VorL. XXXIX. 
tarsus terminating in a simple tube; legs rather short, body never high 
and broad; mandibles not large and porrect . ; 1 cytodide. 
Male palpus has the palpal organ quite complicated, and the tarsus 
partly covers it; the epigynum is more than a slit, else the mandibles are 
large and porrect, or the abdomen very elongate , ; UNS. 
23. At base of mandibles on outer side is a striate or roughened area; 
clypeus high, higher than height of eye-area; no accessory claws (or 
serrate bristles) at tip of tarsi; male palpal organ with a tarsal hook ; 
making irregular webs . " ; P : . . Linyphiide. 
At base of mandibles there is no such roughened area, but usually a 
smooth swelling or boss; clypeus low, usually not as high as height of 
eye-area ; accessory claws (or serrate bristles) at tip of tarsi; making 
geometric webs . : i : ; i ‘ . . Epeirid. 
24. Two eyes only in anterior row; clypeus not as high as ocular area 25. 
Usually four eyes in front row, if but two, then clypeus is much higher 
than ocular area : y í i S : . : . A 
25. Eyes in four rows, the anterior practically at the clypeal margin, 
abdomen long and slender . à : . .  Podophthalmide. 
Eyes not in four rows, the anterior row some distance from clypeal 
margin; P. M. E. closer to A. S. E. than latter to A. M. E. ; body not 
long and slender . diua à : . i i Ctenidze. 
26. Males only : — eyes of second row very much larger than all other eyes 
together, abdomen long and linear TU i . A Dinopidz. 
Males only : — abdomen not long and linear, eyes not as above ; head 
very low in front ; at tips of tarsi are accessory claws as in Epeiridz, leg 
I much larger and longer than others . ; i : Uloboridz. 
Males and females: — Eyes of second row never so large ; abdomen 
not linear; head rather high or else leg T not larger and longer than leg 
V ; no accessory claws at tips of tarsi ; : ‘ ; 3 5 
27. But two eyes in anterior row, or if four, then median eyes are very 
small and fully three times their diameter from the side eyes ; clypeus 
Wen Oxyopide. 
Four eyes in anterior row, middle eyes never so very much smaller nor 
so far from the side eyes; clypeus much lower ; : . . 28. 
. 28. Eyes in three rows, 4-2-2, those of anterior row very much smaller 
an others; cephalothorax rather long and narrow, clypeus nearly verti- 
cal; no spur at tip of tibia of male palpus i ; i Lycosidz. 
Eyes in two curved rows, those of anterior row not so much smaller 
than others ; the cephalothorax broad and flattened ; clypeus often slop- 
Ing; a spur at tip of tibia of male palpus : : i Pisauridz. 
29. Eyes in three rows, 42-2, those of second row very much larger than 
all other eyes together, abdomen very long and linear . Dinopide. 
No such eye conditions; abdomen shorter . í i ‘ rue 
30. S. E. as far apart as M. E.; clypeus low ; cephalothorax broad 
Uloboridz. 

