ERGINUS. 
a. Femur iv. with two series, a dorsal and an inferior, of 
comparatively short denticles. No external basal series. 
a. The inferior series of denticles on femur iv. subequal 
in length throughout; the basal denticle erect and 
set out of the plane of the rest of the series . 
6“. The inferior series of denticles on femur iv. becoming 
much longer from the middle towards the apex ; the 
basal denticle quite small and normally situated 
6°. Femur iv. with three series of very long denticles, those 
of the inferior series as long as three times the width 
of the segment ; also with a short external basal series 
of four long denticles 
Females. 
A. Tarsus iil. with 7 segments. 
a. Third segment of dorsal scutum with a pair of rudimentary 
tubercles only. Coxa iv. with a double tubercle at its base, 
just behind the trochanter iii. Size much longer, length 
QOmillim. 2. 5 6 6 we te es 
b. Third segment of dorsal scutum with a pair of sharp spines. 
Coxa iv. without tubercles as above. Size much smaller, length 
5 millim. 
a, Femur iv. longer (5 millim.), and scarcely arcuate in the basal 
half 2. 1 1 we ee ew we ee ee 
b:. Femur iv. shorter (4 millim.), more strongly arcuate in the 
basal half . 
B. Tarsus iii. with 8 segments. 
a’, Tarsus iv. with 8 segments 
&*. Tarsus iv. with 9 segments. 
a’. Size much larger, length 9 millim. Third segment of dorsal 
scutum entirely devoid of spines or tubercles. Femur iv. 
arcuate in the basal half . . . . 2. 2 ew ee : 
B®. Size much smaller, length 5 millim. Third segment of dorsal 
scutum with a pair of long stout spines. Femur iv. straight 
throughout . . . - - + + 6 6 ee 
1. Erginus serratifer, sp.n. (Tab. LII. fig. 18, ¢ .) 
erectispinus, sp. 0. 
rectus, Sp. I. 
pectinigerus, sp. 0. 
serrato-tibialis. 
simplicipes. 
sinuosus. 
serratipes. 
pectinigerus. 
erectispinus. 
Type, , in coll. Godman & Salvin. Total length 5 millim. (excl. mand.); femur iv. 3°25 millim. 
561 
é. 
General characters similar to those of Z. pectinigerus. The two spines on the tergal third segment are. 
short. Tarsal segments, i. 6; ii, 13; iii. 7; iv. 7. Trochanters iii. and iv. and coxa iv. with an 
apical tooth. Basal segment of mandible granulose and in other respects similar to that of E. erecti- 
spinus.. Femur iv. with an internal inferior series of 18 long denticles, basally coalescent, the longest 
more than twice the width of the segment, extending from the base, but not quite reaching the apex, 
and an external, dorsal, basal series of 5 or 6 shorter denticles occupying the basal third, besides two 
inferior series of small tubercles extending from the base, but not quite reaching the apex, those of the 
BIOL. CENTR.-AMER., Arachn. Opil., Vol. IL, January 1905. 4 of 
