458 
PACIFIC SCIENCE, Vol. XI, October, 1957 
gnathosoma are quite elongate. Chelicerae 
(Figs. 245, 247) with posterior end bent 
rather sharply downward; tarsus with about 
four dorsal teeth in distal half, and four to 
five subdorsal teeth in basal half. Palpi (Fig. 
242) considerably larger and relatively thicker 
than in Lassenia lasseni (Fig. 201). Anterior 
aspect of trochanter deeply dissected, but the 
sclerotization of the femur extends deep into 
this, so that the fenestration of the anterior 
wall of the trochanter is markedly reduced; 
left trochanter of holotype female with, 
right trochanter without, a seta on posterior as- 
pect. Femur with 51, patella 36, and tibia with 
27 smooth slender setae in the single specimen 
studied, plus the large terminal and smaller 
subterminal spiniform setae on the tibia. The 
terminal seta of the tibia is unidentate. Tarsus 
(Fig. 238) with a single solenidion at 0.88 pd, 
this showing faint spiral structure and a some- 
what swollen base. Proximal two-thirds of 
tarsus with 24 normal setae like those on the 
other segments of the palp; distal one- third 
of tarsus with 15 eupathidia showing distinct 
annulate structure internally. The eupathidia 
are somewhat heavier than the solenidion, 
and the curvature of the two types of setae is 
reversed. 
Chaetotaxy of legs approximately as shown 
in table (s = solenidia, e = eupathidia, f = 
famulus, v = vestigial setae, n = normal 
setae, m = many). 
All solenidia of patella and tibia of all legs 
of s 3 type, except for one questionable s 4 on 
tibia I and II. Tarsus I with famulus at 0.80 pd 
and many eupathidia extending from 0.13^ to 
O.lld; six or seven s 3 near the base of the 
tarsus, but all of the other many solenidia are 
more or less of the same form and size, so 
that it is impossible to differentiate the types 
with certainty. End of tarsus I rather abruptly 
cut off, beginning at about 0.90 pd; claw fossa 
absent. Tarsus II with famulus at O.Glpd, and 
about five eupathidia between O.lld and 
091pv; no ventral eupathidia. One seemingly 
distinct s 2 at 036d, one or two s 3 near the 
base of the tarsus, and two or three other 
solenidia of indeterminable type (si or s 4 ). 
Tarsus II tapering rather abruptly from about 
O.Gld to the end of the segment, claw fossa 
absent. Tarsi III and IV each with about five 
s 3 or s 4 ; III with five eupathidia ranging from 
0.19^ to 0.95^, IV with an equal number 
ranging from 0.18 d to 0.79^, terminal eupa- 
thid lacking. All tarsi with two heavy claws 
faintly hirsute along convex margin. 
Telofemora well supplied with eupathids 
especially on I. Telofemur, patella, and tibia 
I notable in that the majority of the eupa- 
thidia are ventral in position. Of the 10 
counted on telofemur I, 6 were dorsal or 
marginal in position, while 4 were ventral; of 
the 18 counted on patella I, 6 were dorsal or 
marginal while 12 were ventral; and of the 
32 on tibia I only 8 were dorsal or marginal 
in position while 24 were ventral. These fig- 
ures, like the rest of the figures in the accom- 
panying table were based on counts made on 
a single specimen. Vestigial setae only on 
patella I and II and on tibia I; no vestigial 
seta on tibia II. All eupathidia on the telo- 
femur, patella, and tibia of legs II to IV either 
dorsal or marginal in position, none ventral. 
Lassenia scutellata new species 
LARVA: Body (Fig. 249) 387 jjl long, 243 ju 
wide, length/width 1.58 (one specimen only). 
Scutum subrectangular in form, divided into 
a small anterior portion bearing the anterior 
sensilla, and a much larger posterior portion 
bearing the posterior sensilla and other setae. 
tf pa ti ta 
e 
S3 
e 
V 
S3 
s 4 
e 
V 
s 2 
Si 
S 4 
s 3 
e 
f 
I 
10 
13 
18 
1 
54 
1? 
32 
1 
(- 
— m- 
— ) 
7 ± 
m 
1 
II 
3 
“7 
/ 
4 
1 
8 
1? 
6 
0 
1 
(-: 
2,3") 
1,2 
5 
1 
III 
2 
7 
6 
0 
9 
0 
5 
0 
0 
0 
(-4: 
,6-) 
5 
0 
IV 
1 
8 
8 
0 
17 
0 
6 
0 
0 
0 
(“4; 
,6-) 
6 
0 
