234 
H. Smit 
Description 
Female 
Body 1944 (1848-2232) long and 1656 (1656-1932) 
wide. Body colour yellow. Anterior body margin 
slightly concave. Posterolateral comers of body 
absent. Dorsal shield slender (Figure 2), rounded 
anteriorly, truncated posteriorly; dorsal shield 1272 
long and 708 wide. Capitular bay V-shaped. 
Distance of CX4 about two times width of one 
genital valve. Medial margin of CX3 and CX4 of 
equal length. Gonopore 175 long. Genital valves 
with small chitinous patches. Genital plates 
straight and narrow, sloping posteriorly, slightly 
widened laterally (Figure 1). Lengths of PI-PV: 55, 
137, 115,156, 92; PII with two setae on medial side. 
Lengths of I-leg-4-6: 243, 223, 223. Lengths of IV- 
leg-4-6 310, 291, 252. 
Remarks 
A widespread species in Australia, known from 
Western Australia, Victoria and Queensland. Only 
the male of this species was known hitherto, a 
description of the female is given above. 
The shape of the dorsal shield of the female is 
similar to that of A. fissipetiolatus Lundblad and A. 
ensifer sp. nov. 
Arrenurus (Arretturus) ensifer sp. nov. 
Figures 3-8 
Materia] Examined 
Holotype 
6, pool, Joffre Gorge, Hamersley Range National 
Park, Western Australia, Australia, 13 August 1994 
(WAM). 
Paratypes 
Australia: Western Australia: 1 S (not fully 
sclerotized) (ZMA), 1 2 (WAM) and 1 nymph (?) 
(ZMA), Ashburton River at crossing with North 
West Coastal Highway, 18 August 1994. 
Diagnosis 
Petiole sword-like, dorsal shield of male 
truncated. Dorsal shield of female slender, D1 and 
L4 on humps. 
Description 
Male 
Body 1280 long (including petiole) and 1038 
wide. Body colour yellowish. Anterior body 
margin concave. Dorsal shield 713 long and 446 
wide, tapering posteriorly, truncated (Figure 3). D1 
on large humps (Figure 5). Cauda short, almost 
absent. Pygal lobes well developed, broad and 
rounded. Hyaline membrane large. Gonopore 68 
long. Genital plates not extending to lateral body 
margin, widened medially (Figure 4). Petiole 
sword-like, 232 long (measured from ventral view). 
Ligulate process absent. Curved setae extending to 
posterior margin of petiole. Lengths of PI-PV: 43, 
130, 108, 130, 86; PII with 2 heavy setae on medial 
side near anterior margin of segment; P1V with an 
angular anteroventral comer. Paratype male with 4 
setae on medial side of PII, of which 2 near 
anteroventral comer of segment. Lengths of I-leg- 
