Butler should be placed in Micropholcomma and a close examination of both males and females of Plectochetos longissimus Butler and the structure of the respiratory system leads me to conclude that this species is also congeneric with M. caeligenus Crosby and Bishop.

Micropholcomma longissima (Butler) 1932.

1932. Plectochetos longissimus Butler. Proc. Roy. Soc. Victoria 44 (2), p. 107. Figs. 64–69.

Male. Measurements: Carapace—Length, 0.38; width, 0.36; height, 0.32. Abdomen—Length, 0.60; width, 0.56.

Colour. Cephalothorax, appendages and soft portions of abdomen pale yellow-brown. Abdominal scutes darker brown.

Carapace (Fig. 64). Seen from the side the carapace is almost square. The dorsal surface of the head region is flattened and slopes very very steeply down to the posterior margin of the carapace. There is no thoracic groove.

Eyes. Eight. From above the posterior row is strongly recurved. Ratio of AME:ALE:PME:PLE = 4:6:6:5. AME separated from each other and ALE by distance equal to half of diameter of an AME. Lateral contiguous; PME separated from each other and from the PLE by a distance equal to the diameter of an AME. Clypeus high, slightly concave, height equal to five times the diameter of an AME.

Chelicerae (Fig. 69). Vertical; without boss. There appears to be a single tooth and a stout peg on the retromargin, promargin smooth. There is a long smooth hair at the side of the tooth and 2 ciliate hairs on the promargin with a distal mound from which extend a long ciliate hair and a shorter smooth hair.

Legs. 4.1.2.3. Clothed with slender, smooth hairs, except on ventral surfaces of metatarsi and tarsi of legs 3 and 4, where the hairs are stronger and serrated. Three trichobothria present only on tibiae arranged 2.1 on legs 1–3 but 1.1.1 on leg 4. No trichobothria on metatarsi. Three claws, superior homogeneous with 3–4 teeth, inferior smooth. Tarsal drum proximal.

Palp (Figs. 67, 68). Tibia with a short projection on the mid-dorsal surface. Tarsus and bulb twisted out so that the morphologically ventral surface is retrolateral. Tarsus flattened with irregular shape as shown in Fig. 68, distal surface indented. Conductor coiled.

Abdomen. Ovoid, not rising above carapace. Well developed scutes present on both dorsal and ventral surfaces. Lateral surfaces with longitudinal ridges. Six spinnerets and colulus in compact group, posteriorly situated, encircled by sclerotic ring.

Female. Abdomen without dorsal scute but surface coriaceous with numerous small sclerotic plates, of which the smaller are setose. The openings of the epigynum are placed in front of the posterior margin of the ventral scute. Internal genitalia simple. A long, straight tube leads back to a simple receptaculum which is situated immediately behind the petiolus (Fig. 66).

Type. Male described by Butler from Mt. Donna Buang, Victoria, in National Museum of Victoria.

Records. Tasmania: Dove River, near Crater Lake, Cradle Mountain, ex moss in Beech forest, February 21, 1955, T. W. Woodward. N.S. Wales: National Park, ex leafmould, August 24, 1952, T. E. Woodward. S. Queensland: Beechmont, August 1, 1954, T. E. Woodward.

Remarks. This species was originally placed by Butler into a separate genus Plectochetos. I consider that the species is congeneric with Micropholcomma bryophila (Butler) described in the same paper.