302 THE AMERICAN NATURALIST. [Vor. XXXIX. 
3. Upper spinnerets rather short, last joint short and obtuse ; mandibles 
with a clusterof teeth, or rastellum, in front 
Upper spinnerets rh and last joint slender ; BETEN ie ras- 
telum . rs A 
4. Tarsi and metatarsi 1 parte Pieds: all tarsi mies 
Brachythele. 
Tarsi and metatarsi I not scopulate ; hind tarsi with spines Evagrus. 
Tibia III with a deep sulcation above at base 
No such sulcation : 
6. Tip of abdomen broadly Musicute; bing ai an RR duda: online 
in 
Cyclocosmia. 
Tip of abdomen normal , Pachylomerus. 
7. Tarsi I and II not onusta: with stoutspines . Mes 
Tarsi I and II scopulate 
8. Sternal impressions large, close other. und far ER margin 
en 
Sternal impressions small and near the margin 
Mandibles with four long, equal teeth in front HACEN the manaii 
Actinoxia. 
Rastellum of many irregular spines . EL. 
10. Tarsus I equal to metatarsus I, latter with is itte; en 
Amblyocarenum. 
Tarsus I shorter than metatarsus I, latter with many spines 
Aptostichus. 
. With but four spinnerets . i 5 i à Brachybothrium. 
With six spinnerets  . 12. 
. Apical joint of upper spinnerets mack Moser thon EIER mad 
bles without a rastellum ; no sternal i impressions . Hexura. 
Apical joint of upper spinnerets barely longer than Dre, ; mandi- 
bles with a rastellum ; two pairs of small sternal i impressions 
Atypoides. 
13. Tibie and metatarsi III and IV with very few spines ; tarsi shorter 
and broader . 15. 
Tibiz and metatarsi IH nd IV with many spines ; tarsi Inge 14. 
14. Metatarsi I scopulate to base, rarely with basal spines Eurypelma. 
Metatarsi I not scopulate to base ; basal spines present  Rhechostica. 
15. Eyes of anterior row scarcely unequal, forming a strongly procurved 
o 
— 
- 
- 
N 
a Avicularia. 
Eyes of anterior à row distiuclly sinu, incid a seni straight row 
Tapinauchenius. 
FILISTATIDE. 
We have but one genus in this country, Filistata, and probably but one 
species, which is frequent about buildings in the southern States. 

