ANYPHENIDA. 
A. Spiracular rima situated at, or before, the middle of the ventral area, 
which extends from the genital rima to the base of the spinners. 
I. Maxille not more than twice longer than broad, almost parallel- 
sided, not conspicuously dilate at their apex. (Mandibles of 
male not developed, normal.) 
a. Protarsi i. and ii. with one pair of spines only at the base 
beneath. Eyes of anterior row subequal . . 
6. Protarsi i. and ii. with two pairs of spines beneath. Central 
anterior eyes distinctly smaller than the laterals 
II. Maxille at least three times longer than broad, emarginate on 
the outer side, distinctly dilate at the apex. Mandibles of 
male more or less developed. 
i. Eyes of anterior row subequal, or centrals slightly larger. 
a. Posterior row of eyes straight, or almost so. Legs i. longer 
than iv. Lower margin of fang-groove with 3-7 teeth . 
b. Posterior row of eyes strongly procurved. Legs iv. longer 
than legsi. Lower margin of fang-groove with two teeth 
only. 2 1 ee ee ee 
ii, Eyes of anterior row very unequal ; centrals much smaller. 
aa. Tibiz i. and ii. with two to five pairs of spines beneath. Legs 
much shorter and stouter (except in Wulfila), the spines 
stouter and less numerous, and regularly paired. 
i. Protarsi i. and ii. with one pair of spines only at the base 
beneath. Eyes more widely separate. Carapace more 
convex, broader infront. Lower margin of fang-groove 
with 4—5 stout teeth (¢). Males with very long 
mandibles . 2... ee et ee et es 
ii. Protarsi i. and ii. with two to three pairs of spines 
beneath. Eyes more closely grouped. Carapace com- 
pressed, especially in front. Lower margin of fang- 
groove with 10-13 minute teeth (2). 
a. Protarsi i. and ii. with two pairs of spines beneath. 
Legs much stouter and spines stouter. Tibie 1. 
and ii. with two pairs of spines beneath 
- §. Protarsi i. and ii. with three pairs of spines beneath. 
Legs much more slender and spines more slender. 
Tibize i. and ii. with three pairs of spines beneath 
bb. Tibie i. and ii. with 16-20 very long spines, irregularly 
situated, not regularly paired. Legs much longer and 
more slender. 
1. Protarsi i. and ii. with 10-16 long, slender spines 
beneath. Terminal segment of posterior pair of 
spinners less than half as long as the basal segment. 
Maxille shorter and more parallel-sided, not distinctly 
dilate at the apex . 
form, group 1). 
Anypuana, Sund. (typical 
ANYPHENA, Sund.(group 2). 
AysHa, Keys. 
Aracuosia, O. P.-Cambr. 
Trvupis, O. P.-Cambr. 
SILLUS, gen. nov. 
Wu trina, O. P.-Cambr. 
Cracus, O. P.-Cambr. 
