304 THE AMERICAN NATURALIST. |. [Vor. XXXIX. 
2. With but six eyes ‘ : i : . Spermophora. 
With eight eyes . 4. 
3. A. M. E. much closer to Seach her thas to É S. E.; finora very rone 
abdomen elongate . . Pholcus. 
. M. E. as close to A. S. E. as’ to see TS shone globose 4 
4. Femur I not twice the length of xvi and shorter than femur 
IV He 
Peer I twice as PR as bes con a 5. 
5. Posterior Nue slightly procurved ; feu I me das IV 
silochorus. 
Posterior eye-row slightly recurved ; femur I shorter than IV 
Physocyclus. 
DYSDERIDE. 
1, Leg III directed backward ; spines on sides of tibie IV ; tarsi scarcely 
one fourth the length of metatarsi; no spines under metatarsi I 
Dysdera. 
Leg III directed forward ; no spines on sides of tibie IV; tarsi je 
one third the length of metatarsi; spines under metatarsi I 
2. The M. E. rather closer to A. S. E. than toP. S.E. . ‘ Sauce 
The M. E. closer to P, S: E. than to A.S.E. . ie . Ariadne. 
PRODIDOMIDE. 
This is represented in our country by but one genus, Prodidomus Hentz, 
with one species, found in dark situations in houses in the southern States. 
An allied genus, Zimiris, occurs in Mexico, and differs from Prodidomus in 
having the inferior spinnerets very much longer than the others. 
ZODARIIDE. 
With but two distinct spinnerets ; cephalothorax rather er tarsi with 
3 claws Lutic 
With more ihi two spinners Gib halothorax rather dati tarsi with 
but two claws : E Hoimalonychibs ; 
DRASSIDE. 
t. Mandibles with a plate or lobe on under side behind the fang ; posterior 
eye-row plainly recurved . x 
Mandibles without such plate, init one or two weis poaterici eyerow 
often procurved or straight, rarely a little recurved 3 
2. Posterior eye-row broader than anterior row; P. S. É. not N larger 
an P. M. E.; head broad . E Tu UE Gnaphosa. 
