Johnstonianidae — Newell 
417 
setae in a single row, paragenital sclerites with 
15 to 18 smooth setae. Three pairs of genital 
acetabula. Anus (Fig. 18) flanked by two 
crescentic sclerites bearing 6 to 8 smooth setae 
each. Base of gnathosoma and rostrum as 
described for C. approximation, new species. 
Chelicerae also as in the following species, 
except that the teeth on the chelicerae appear 
to be significantly heavier (compare Figs. 7, 
52). In the holotype female there was a seta 
at the base of the dorsal membrane of one 
chelicera, and an indication of at least the 
alveolus and a short shaft on the other cheli- 
cera (Fig. 24). However, no such seta could 
be found on the male collected at the same 
locality, nor on either the male or female of 
C. approximatum. This is an interesting anom- 
aly, suggestive of the condition normally 
found in the Parasitiformes, and many of the 
Eleutherengona in which a seta is frequently 
found in this position in normal individuals. 
Number, form, and arrangement of setae on 
all segments of the palp identical with that of 
the holotype of C. approximatum (Figs. 58, 
59,61). 
Chaetotaxy of legs approximately as shown 
in table (s = solenidia, e = eupathidia, f = 
famulus, v = vestigial setae, c = companion 
setae, n = normal setae, m = many). 
Vestigial setae absent on all segments of all 
legs, and eupathidia present only on the tarsi. 
Tarsus I greatly swollen, height/length 0.50 
to 0.56 (two specimens), claw fossa begin- 
ning at 0.64 to 0.65 and extending to end of 
tarsus. Typically with two clavate solenidia 2 
on the posterior aspect of tarsus I, the first of 
these at about 0.65 to 0.68 p, the second at 
0.70 to 0.79 p (Fig. 9). In some cases s 2 have 
a faintly annulate structure; in others they 
appear smooth. The peculiar seta with the 
tr 
bf 
tf 
pa 
n 
n 
S3 
S3 S4 
I 
4-5 
15 
6-10 
31 2-3 
II 
4 
11 
3-7 
16 0 
III 
5 
11 
3-4 
8-12 0 
IV 
8 
9 
4 
9 0 
fusiform distal half seen disti-ventrally to the 
solenidia 2 in Figure 9 is an anomaly. Famulus 
spikelike, located at 0.90 to 0.93 pd, arising 
from a distinctly vesicular alveolus. Tarsus I 
also with numerous Si and eupathidia, the 
latter extending around the ventral and distal 
margin of the tarsus from 0.43^ to 0.80V. The 
eupathidia have a characteristically geniculate 
terminal filament visible under oil (not shown 
in figure). Some tarsi I have only one or as 
many as three solenidia 2 , but two is the normal 
number. Tarsus II with a single clavate soleni- 
dion 2 near the basal end of the claw fossa 
(Figs. 6, 8) at about 0.64 pd, and a peglike 
famulus at 0.85 pd, borne on a distinctly vesic- 
ular alveolus. Tarsi III and IV with two and 
one eupathidia each in the material studied. 
S 2 highly distinctive (Figs. 15, 16), but s 4 
(Fig. 13) occasionally intergrading with si and 
s 3 so that it is difficult to assign certain setae 
to one or another type. 
male: Body 754 to 858 /jl long (average 806 
/x, three specimens). In general resembling 
female except for structure of genital area 
(Fig. 21). Genital sclerites with 6 to 9 setae 
in a single row, paragenital sclerites with 12 
to 18 setae in a single row. Three pairs of 
genital acetabula. An interior circlet of about 
12 setae can be seen in some favorable speci- 
mens, but are not shown in the figure. Penis 
very small, inconspicuous. Anal sclerites as 
in female. 
larva: Idiosoma (Fig. 27) 152-167 /x long. 
Scutum somewhat triangular, greatly reduced 
(Fig. 32), bearing only the posterior pair of 
sensilla, anterior to which is a pair of stiff, 
hemipectinate setae. Between the latter a very 
short, rudimentary crista metopica. Sensilla 
capitate, the spherical distal portion crumpled 
in some mounted specimens (artifact). Ocular 
ti ta 
S3 
s 4 
Si 
s 2 
s 3 
s 4 
e 
f 
28-35 
3 
15 
2 
0 
4 ? 
m 
1 
17 
2 
6-8 
1 
0 
0 
2 
1 
10-14 
0 
0 
0 
0 
2 
2 
0 
8 
0 
0 
0 
0 
1 
1 
0 
