
312 RECORDS OF THE S.A. MUSEUM 
cies differs from pusillum in the presence of the external spine on the palpal 
tibia. In having only one such spine it also agrees with americanum \(Leon.) 
from Chile, and with jabanicwm Berl. from Java. It differs from americanum, 
however, in the form and dimensions of the front tarsi and metatarsi, but agrees 
in these characters with pustllwm and jabanicum. In the last species the external 
spine on the palpal tibia is short and arises close to the base of the claw (ef. 
Berl., 1912) ; in karriensis it is long and more slender and arises from near the 
articulation of the tarsus. The dorsal setae are about as long as, but thicker 
stemmed than, in pusillum, and shorter than in americanum. 
The species is somewhat variable in size and also in the dimensions, but not 
the relative proportions of the front tarsi and metatarsi. 
In the following table are given the measurements in microns, of thirteen 
specimens including the type. 
Tarsus I. Merararsus I. Cris'ra. 
Loc. Leneta. Wintn. Lex. Hr, L/H. Len. Lr/Lu. Lex. SB. DS. 
Denmark, W.A. 1,200 780 272 155 1-78 155 =1-78 330 32 30 
Belair, 8.A. 1,800 1,050 346 1538 2:26 200 1-73 405 29 30 
- 3 1,200 900 292 133 2-19 150 «1:95 346 29 30 
ny Ae 1,875 1,150 292 180 2-25 140 «2-08 —_ —_ 29 
x, ji 1,950 1,200 310 182 1-70 182 1-70 405 32 30 
a ¥ 1,500 975 292 126 2-31 130 4 =2-25 328 25 29 
by 3 1,125 720 164 86 1-91 86 1-91 236 25 29 
£, » 1,125 720 210 112 1:87 115 «1-83 310 25 29 
45 4g 1,170 750 218 115 1-90 119 1-83 325 32 29 
i 1,425 950 235 122 2-10 126 §=1:86 328 29 30 
is 4 1,200 770 189 100 1-89 101 1:89 255 25 29 
as * 1,350 900 218 122 1:78 126 1-73 — — 29 
+ pa 1,250 810 200 101 2-00 108 1:85 272 29 30 
A study of the above measurements suggests that the specimens 2, 4 and 5 
in which the values are much higher than for the others may be females, the 
rest males. All the thirteen were fully adult as shown by the three pairs of 
genital dises. 
A single specimen from Long Gully, South Australia, 11th June, 1938, 
measured 1500 long with tarsus I 195, by 100, and metatarsus 105, but had 
the dorsal setae 40-43» long. It may perhaps be considered a variety. 
The two specimens described as tasmanicum Wom., 1937 (loc. cit.) as well 
as two others from Mt. Wellington, Tas., Dec., 1937, agree with karriensis except 
that in the first two, the ratio of length of tarsus I to metatarsus I is 1-0:1°40 
and 1:0:1-32. 
MicroTROMBIDIUM HIRSUTUM sp. nov. 
Fig. 10 F_I, 
Description. Adult. Length 2-1 mm., width 1-5 mm. Colour in life red. 
Shape as in other species. Legs I 1875u, Il 1275p, III 975y, [IV 1425,; front 
tarsus 405p long by 210» high, metatarsus 270n long. Crista elongate, 460. 
long, with subposterior sensillary area, paired filamentous sensillae with their 
bases 25h apart. Eyes 2-+-2, on distinct ocular shields. Palpi stout, tibia with 
stout apical claw, smaller accessory claw, two pectines, and a strong external 
spine. Dorsal setae slender with only moderately long setules (ef. fig. 10 1) vary- 
ing in size from 40, to 75h, but with no sharp demarcation into two distinet sizes. 
Loc. A single specimen from Morialta, South Australia, 2nd Sept., 1934. 
H.W.). 
Remarks. Separated as in the key to species on the dorsal clothing and the 
dimensions of the front tarsi and metatarsi. 
