460 
PACIFIC SCIENCE, VoL XI, October, 1957 
Cuticle of scutum slightly punctate; crista 
absent. Anterior sensilla only about half as 
long as posterior sensilla; scutum otherwise 
with two other pairs of setae. All setae of 
scutum with a few very minute barbs visible 
only under high magnification (400 x or 
higher). Ocular plates with two well-devel- 
oped corneae, separated from the scutum by 
a narrow interval of striated cuticle. Dorsal 
and marginal setae numbering 20 pairs; venter 
with 7 pairs of ventral setae excluding those 
on the anal plates. Membranous cuticle of 
both dorsum and venter distinctly marked 
with striae which for the most part are 
parallel. 
Coxae I (Fig. 251) each with two setae 
ventrally and a small inconspicuous supra- 
coxal seta; II with one, III with two setae. 
Between coxae I and II is a large well- 
developed urpore and anterior to coxa III at 
the margin of the body, a large sclerite ob- 
viously comparable with that found in Las- 
senia lasseni , new species. In the sole specimen 
available the soft parts were not very well 
hydrolyzed and a glandlike mass of cells can 
be seen extending up to the inner surface of 
the plate. Intercoxal area devoid of setae; 
postcoxal area with seven pairs of ventral 
setae surrounding the well-defined anal scler- 
ites which bear an additional two pairs of 
slender setae. 
Base of gnathosoma as described for Las- 
senia lasseni . Podocephalic canals probably 
present but not visible because of opacity of 
specimen. Supracoxal setae present, structure 
of velum obscured by organic accretions evi- 
dently resulting from feeding activities of 
mite; protorostral, deutorostral and tritoros- 
tral setae present, posterorostrals absent. 
Chelicerae (Fig. 261) essentially as in Las- 
senia lasseni; tarsus with two teeth dorsally 
(not visible in figure because of rotation of 
chelicera). Cuticle of chelicerae faintly and 
sparsely punctate, with parallel longitudinal 
striae dorsally. Palpi (Fig. 265) distinctly 
five-segmented, trochanter and femur com- 
pletely separated, not partially fused as in 
Lassenia lasseni. Trochanter very short, ring- 
like, femur bearing only two setae, one dor- 
sally and one anteriorly. Patella wedge- 
shaped, bearing a single long seta dorsally; 
tibia with only three very slender slightly 
pectinate setae in addition to the heavy ter- 
minal toothlike seta; the latter is not bifid at 
the tip but the microscopic structure of the 
hollow tip appears identical with that of the 
type species. Tarsus of palp with a distinctly 
annulate solenidion at 0.28 p, one eupathid at 
0. G9d, and a second one terminally, otherwise 
with nine normal setae. The most basal of the 
latter is rather sharply deflexed and heavily 
pectinate, but it is not short and stout as in 
the genotype. Base of tarsus also with a pit- 
like structure dorsally, the exact nature of 
which is not known. 
Chaetotaxy of legs approximately as shown 
in table (s = solenidia, e = eupathidia, f = 
famulus, v = vestigial setae, c = companion 
setae, n = normal setae). 
Chaetotaxy of legs differing in numerous 
specific respects from Lassenia lasseni . Tro- 
chanters I to III (Figs. 262-264) with a single 
seta each. Femora with no trace of sub- 
division, so that the legs have only five free 
segments as in the type species. Patella I and 
II with vestigial seta of the same form as 
found on tibia I (Fig. 257). Tibia I with, II 
without a vestigial seta; tibiae not so richly 
supplied with solenidia 3 as in the case of 
Lassenia lasseni , there being only four on tibia 
1. Tibia I with a solenidion 4 at 0.72 d, but II 
and III with only the solenidia 3 . Tarsus I with 
Si and companion setae at 0.2ld, a smooth, 
elongate spikelike famulus at 0.6%pd, a eupa- 
tr fe pa 
a n s 3 v n 
1 6 2 15 
1 6 114 
1 5 1,0 0 4 
ti 
s 3 s 4 v c n 
4 1118 
2 0 0 0 9 
1 0 0 0 8 
ta 
Si S2 e f c n 
1 0 2 1 2 3 6 
0 1 2 1 1 29 
0 0 1 0 0 24 
I 
II 
III 
