322 THE AMERICAN NATURALIST. (VoL. XXXIX. 
Cephalic part far shorter . 23 
23. Cephalothorax high, and rather bisd; diadranghé of eyes wider 
behind than in front; large species, rarely under 7 mm. ; leg I heavy and 
very hairy, often with fringes of hair, mandibles often FERN often 
a group of stout bristles near lateral eyes . ; idippus. 
Cephalothorax not as high and heavy, leg I not so babes smaller spe- 
cies, rarely over 6 mm. 24. 
24. A spine above before middle on | tibia Ill aod IV, a on base 
of metatarsus IV ; leg I not thickened ; small species . Attinella.1 
No spines TNR on tibia III and IV, nor on base of metatarsus IV 25. 
25. Tibia I with 2-2 large spines, and toward base are two pairs of large 
bristles with enlarged bases, not obscured by other hairs ; metatarsi IV 
spined throughout, patella III and IV with spines; leg I not much 
thickened . Thiodina. 
Tibia I vibe such bites, distinct bois all die 3-3 spines below 
26. 
26. Legs with few hairs (except sometimes a brush under tibia I in male), 
tibia I about three times as Nes as broad, with very small spines ; legs 
lineate with dark . Tutelina. 
Legs more hairy, tibia ] eie stouter ; leo not neste joe rarely) with 
ar 
27: Cipto eee nn dink width of dorsal eye-line ; tibia and 
metatarsus I in male elongate; abdomen quite slender; s I not very 
heavy ; legs III and IV not plainly banded 
m narrower at dorsal eyes; tibia and; metatarsus I not 
elongate in m 
28. n iun depressed ~ I very uch thickened, mali with 
horny shield on base of abdom : . Metacyrba. 
Cephalothorax higher ; pray vitu shield at base ; 49g. 
29. Tibia I plainly convex below ; legs less hairy ; cenlialouaaes ipods 
Tibia I barely convex below ; legs more hairy ; cephalothorax Bes 
Dendryphantes. 
30. Very few spines on hind legs, none above on bases of tibia III or IV, 
nor on base above of metatarsus III; quadrangle of eyes wider in 
front ; smaller, less hairy species : Habrocestum. 
Hind legs with many spines, alten. one above on base of either tibia 
III or IV or both, and a spine above on metatarsus III; of 
eyes usually wider behind . : ; Pellenes. 
' Attinella, a new genus for Aztus dorsatus Banks. 
2 
Includes Evarcha Simon ; our one species (which seems to be the same as the 
E. AY of A UM cannot be readily separated by generic characters from 
some Pelle 
