Figs 4 −5, 52− 66
Material examined. 15 females, Western Australia, Barrow Island, 20 o 45 ’S 115 o 25 ’E, 2005 / 2006, collected by Penelope Greenslade. All deposited in SAM.
Description. Body length up to 2.4mm. Ground colour pale yellow; Antennae with blue pigments on both ends of each segment. Eyepatch dark blue. Anterior and lateral margin of dorsal head with blue pigment. Dorsal side of body with five blue longitudinal stripes. Coxae and femora with blue pigment on distal parts (Fig. 4). In some specimens, the stripes between the middle stripe and the lateral stripes not obvious (Fig. 5).
Antenna 0.51−0.59 times length of body. Ratio of Ant. I −IV as 1.0/ 1.7 − 2.2 / 1.3 − 1.5 / 1.7 −2.0. Distal part of Ant. IV with many sensory chaetae and normal ciliate chaetae and an apical bulb (Fig. 52). Eyes 8 + 8, G and H smaller. Interocular chaetae as p, q, r, s, t, p chaeta larger than others. Dorsal cephalic chaetotaxy with 4 antennal (An 1, An 2, An 3 a 1, An 3), 2 median (M 2, M 4) and 7 sutural (S0, S 2, S 3, S 4, S 4 i, S 5, S 5 i) macrochaetae (Fig. 53). Labrum chaetae 4 /5, 5, 4, prelabral chaetae finely ciliate, others smooth, distal labral margin with 4 papillae, each with 3 secondary spinules (Fig. 54). Basal chaetae of labium as M, R, E, L 1, L 2, all ciliate (Fig. 55).
Macrochaetae of Th. II −III as shown in Fig. 56. Th. II with 3 (m 1, m 2 i, m 2) macrochaetae in Mm area and 4 (m 4 i, m 4, m 4 p, a 5) macrochaetae in Ms area. Th. III with 3 (a 1, a 2, a 3) macrochaetae in Am area and 6 (a 4 i 2, a 4 i, a 4, a 5, m 5 i, m 5) macrochaetae in As area.
Trochanteral organ with 10−15 chaetae (Fig. 57). Inner differentiated tibiotarsal chaetae ciliate, the most distal one smooth (Fig. 58). Tenent hair clavate, 1.3−1.5 × length of inner side of unguis; Unguis with 4 inner teeth, first pair at about 0.5 distance from base of claw, and 2 unpaired teeth, first one at 0.7 and distal one at 0.8 distance from base respectively; unguiculus acuminate and outer edge serrate (Fig. 59).
Abd. IV 3.3−5.5 times as long as Abd. III along dorsal midline. Abd. I with 9 (10) (m 2 i, m 2, a 2, a 3, m 3, m 4 p, m 4, a 5, m 5, rarely a 6) macrochaetae. Abd. II with 4 central (a 2, a 3, m 3, m 3 e) and 2 lateral (m 5, m 6) macrochaetae, Abd. III with 1 central (m 3) and 3 lateral (am 6, pm 6, p 6) macrochaetae (Fig. 60). Macrochaetae, sensory chaetae and bothriotricha of Abd. IV as shown in Fig. 61, lateral side with 16−23 macrochaetae on each side, central part with 21−25 macrochaetae. Ventral tube anteriorly with 8−11 ciliate chaetae on each side (Fig. 62); posteriorly with 6 smooth chaetae (Fig. 63); each lateral flap with 8–9 smooth chaetae and 1 ciliate chaeta (Fig. 64). Tenaculum with 1 large striate chaeta. Manubrial plaque with 4 ciliate chaetae and 2 pseudopores (Fig. 65). Distal smooth part of dens 2.7−3.2 times as long as mucro in length. Mucro falcate and tip of basal spine not reaching apex of apical tooth (Fig. 66).
Remarks. The species can be easily distinguished from other species in its possession of five longitudinal brownish-black stripes. The colour pattern of our specimens agrees well with Womersley’s original descriptions. This species is the most widespread, common and abundant of all other Australian Drepanura species.
Type locality. Australia: Western Australia, Bridgetown (SAMA I 12257)
Distribution. Australia: all states.