Johnstonianidae — - NEWELL 
419 
plates bicorneate, simple in form. Dorsal and 
marginal setae numbering 24 in four rows of 
6 each, each seta hemipectinate and borne on 
a separate sclerite. 
Coxa I with one pectinate seta laterally and 
another in the medial angle (Fig. 26) ; supra - 
coxal seta absent. Medial portion of coxa I 
very indistinct, differentiated only by the ab- 
sence of striae. Coxa III with a single bifurcate 
seta. Intercoxal area with a single pair of 
smooth setae, inserted on a pair of smooth, 
slender sclerites between III. Fifteen post- 
coxal setae on each side, borne on individual 
sclerites surrounding the anus. 
Base of gnathosoma (Fig. 45) with one pair 
of simple smooth setae (tritorostrals?), deuto- 
rostral setae vestigial, visible only under oil 
immersion; protorostrals small, simple. Velum 
oval in outline, reticular in appearance. Cheli- 
cerae small, compact (Fig. 44), digitus fixus 
very small, pointed, tarsus not in favorable 
position for study, but apparently with one 
dorsal tooth proximal to the tip. Palpi (Fig. 
33) five-segmented, trochanter lacking setae, 
femur and patella each with a single dorsal 
seta with a few barbs. Palpal tibia with three 
simple setae and the unidentate spurlike seta 
which is inserted in the end of a truncate 
projection of the tibia. Palpal tarsus (Figs. 
28, 30) with solenidion at 0.10^, with only 
the faintest indication of annuli. A curved, 
hemipectinate seta at 0.50^ which extends 
along ventral margin of tarsus, somewhat ob- 
scuring the very fine tip. A very heavy seta 
at 0.7 IV, terminal portion flattened, spatulate, 
the margin pectinate. Tip of tarsus forming 
a sharp pointed spine extending well beyond 
insertion of spatulate seta. Otherwise with 
five setae which are smooth, or which bear 
from one to four pectinations; typical eupa- 
thidia absent. 
Chaetotaxy of legs approximately as shown 
in table (s = solenidia, e = eupathidia, f = 
famulus, v = vestigial setae, c = companion 
setae, n = normal setae). 
Tibia I with one s 3 and one S4 dorsally, II 
and III each with one s 3 , and with a ventral 
keel which is best developed on III. The 
solenidia on the first five segments of the legs 
have no perceptible spiral structure. 
Tarsus I (Fig. 31) with Si at 0.47/V, a 
smooth eupathid at 0.75/V, and a heavy, 
smooth eupathid at 0.87^. A smooth normal 
seta at 0.80 V. Otherwise with 25 hemipectin- 
ate normal setae. Claws as described for II. 
Tarsus II (Figs. 34, 35) with a spikelike 
famulus at 0.68 pd, and a clavate solenidion 2 
at 0.67V, the stalk sometimes showing dis- 
tinct spiral structure. A long, smooth, normal 
seta at 0.81V and a eupathid at 0.80 pv, other- 
wise with 21 hemipectinate normal setae. 
Claws two in number, the anterior one 
smoothly curved, scythe shaped, the pos- 
terior one with similar taper and thickness, 
but with a sharp 90 degree flexure between 
basal and middle thirds. Tarsus III (Fig. 46) 
with a smooth normal seta at 0.65V; otherwise 
with 14 normal hemipectinate setae. Tarsal 
claw as on I and II. 
type locality: Tule Lake, Siskiyou 
County, California (holotype female). Com- 
mon along alkali-encrusted shore of lake, on 
mud overgrown with grasses and other plants. 
Types in author’s collection. 
remarks: This species is widely distributed 
throughout the western United States, living 
in marshy situations. It has also been collected 
at a point about 4 miles north of Tonasket, 
Okanogan County, Washington, on the bor- 
ders of small ponds on the Okanogan River. 
These ponds are permanent, and are usually 
flooded each year. A second species, C. ap- 
tr 
bf 
tf 
pa 
ti 
n 
n 
S 3 
n 
S 3 
n 
s 3 
S4 
n 
I 
1 
1 
1 
5 
4 
5 
1 
1 
4 
II 
1 
2 
1 
4 
2 
4 
1 
0 
4 
III 
1 
2 
1 
4 
2 
4 
1 
0 
4 
ta 
Si S 2 e f n 
1 0 2 1 26 
0 1 1 1 22 
0 0 0 0 15 
