Johnstonianidae — Newell 
451 
coxal seta; II with 40 to 45 setae. Dorsal por- 
tion of both coxae I and II membranous. Pars 
medialis coxae with 8 to 10 setae, outside of 
which are 20 to 25 setae in the intercoxal area. 
All of these plus a very few of the most medial 
setae of the coxae are two- to four-pronged, 
and quite stiff (Fig. 197). Apodemes behind 
II lying in a portion of the cuticle devoid of 
setae. Just anterior to III is the homologue 
of the unusual sclerite in the same position 
in the larva. It is extremely variable in form, 
but its constancy indicates that it is an im- 
portant structure. In most cases it appears to 
be a plate with a gland opening. It is also 
present in the female. Coxae III and IV with 
about 40 setae each, all but one or two of 
which are slender, smooth and tapering; the 
remaining one or two are faintly barbed (Fig. 
193). Cuticle of coxae brown in color, mi- 
nutely and densely punctate. Genital sclerites 
(Fig. 185) forming a nearly hemispherical 
protuberance on the ventral surface of the 
body; deeply pigmented, each bearing about 
24 smooth, slender setae. Paragenital sclerites 
slender, crescentic, each bearing 7 setae of the 
same form as those on the genital sclerites. 
Between the anterior ends of the paragenital 
sclerites is a hemispherical, deeply pigmented 
bulla. All sclerites associated with the genital 
opening minutely punctate. Three pairs of 
genital acetabula present; penis scarcely more 
than half the length of the genital sclerites. 
Anal sclerites well developed but slender, each 
bearing zero to five smooth setae. Most ven- 
tral setae much more slender and tapering 
than those on dorsum, each borne on a sep- 
arate minute sclerite. Setae between coxae III 
of right and left sides of much the same form 
as those between coxae II, but not quite so 
heavy (Fig. 198). 
Base of gnathosoma with 12 to 15 smooth 
slender setae (Fig. 180), rostrum with 7 or 8 
more in addition to those at the end of the 
rostrum. Supracoxal setae rather long (20 to 
25 /jl), tapering to a sharp point, inserted in 
the soft membranous dorsal cuticle of the 
coxae. Velum appearing elliptical in ventral 
view, inner margin fimbriated. Lateral to the 
velum is a pair of longer slender protorostral 
setae directed anteriorly, while just above the 
posterolateral margin of the velum is a pair 
of small spikelike deutorostral setae and a 
longer pair of tritorostral setae oriented in a 
posteroventral direction (Fig. 188). 
Chelicerae (Fig. 200) relatively long and 
slender, heavily sclerotized, cuticle densely 
punctate; tarsus with 14 to 15 very minute 
teeth visible under high magnifications; cheli- 
ceral membrane pointed, extending to about 
middle of tarsus. Palpi (Fig. 201) relatively 
long, slender, straight. Trochanter devoid of 
setae, anterior aspect fenestrated. Femur with 
29 to 30 setae, patella with 9 to 10 setae, an- 
terior surface bare; tibia with about 10 normal 
setae plus the heavy spiniform terminal and 
subterminal setae. Tarsus (Figs. 190, 191) with 
an annulate solenidion at 0.4 to 0.5 pd, six to 
eight large eupathidia on distal half of seg- 
ment and two to six normal setae (quite 
variable). All normal setae of palp appearing 
smooth at low magnification (100 x), but at 
higher magnifications a few very minute barbs 
can be seen on some of the setae. No tracheal 
openings could be seen on the dorsum of the 
gnathosoma in the position normally occu- 
pied by these, and no tracheae could be seen 
internally. 
Chaetotaxy of legs approximately as shown 
in table (s = solenidia, e = eupathidia, f = 
famulus, v = vestigial setae, n = normal 
setae, m = many). 
Eupathidia present dorsally or marginally 
I 
II 
III 
IV 
tf pa ti ta 
e 
S3 
e 
V 
S3 
s 4 
e 
V 
Si s 4 
s 2 
S3 
e 
f 
2 
7 
4 
1 
27 
0? 
5,7 
1 
( m- 
-) 
0 
m 
1 
1 
4 
3 
1 
10 
1 
2 
0 
(-13-) 
1 
0 
4 
1 
1 
5 
2 
0 
10 
0 
1 
0 
0 8 
0 
0 
3 
0 
l 
6 
2 
0 
8 
0 
1 
0 
0 10 
0 
0 
3 
0 
