Anagonia latistylus sp. nov.

Figs 61–63

Types. Holotype male in ANIC no. 29-029361, 1 km NE of Millstream, WA, 21°35'S 17°04'E, 6 Nov. 1970, MSU & Feehan; terminalia in tube 2123. Paratypes (all males):— Western Australia: 4 specs. Millstream, 23 Oct. 1970, DHC, T.t. 430, 431, 2117, and 2125; 3 specs. as for holotype, but 1 Nov. 1970, T.t. 434, 435, and 436.— Australian Capital Territory: Black Mtn, light trap, 23 Jan. 1962, IFBC, T.t. 114; the same, but 15 Jan. 1965, T.t. 63, and 19 Dec. 1967, T.t. 296.

Generally resembling others in the group; more distinctive features as follows:

Male. Head. Width 2.3–3.0, mean 2.70 mm. Frons relatively narrow, FrW/HdW mean 0.18; Ivb/Vb-E 1.0–1.4, mean 1.17. Eye almost or entirely bare. Parafacial and much of fronto-orbital plate pale in ground colour; the former rather sparsely haired. Ocellar setae usually barely differentiated

but occasionally moderate; postocellar setae 2. Upper occiput with 1–2 rows of black setulae behind postocular row.

Thorax. Median vitta usually well developed. Presutural intra-alar lacking on at least one side, usually on both.

Legs. Tibiae dark, concolorous with femora. Hindtibia with pd1 short, ratio Pd1/Sdd 0.6–0.9, mean 0.83. Hindtibial ad comb distinctly sparse.

Abdomen. Rather noticeably pale, syntergite 1+2, tergite 3, and tergite 4 pale on lateral third. Syntergite 1+2 and tergite 3 with submedian marginal bristles not differentiated.

Terminalia (Figs 61–63). Surstylus greatly expanded, but still pointed and angled in the fashion typical of the group. Cercus structurally resembling that of A. opaca; basal lobe small, separated from apical part by an extensive membranous region about as long as the apical part itself; the latter thumblike, with a central patch of setulae.

Female. Not recognized.

Distribution. ACT and northern Western Australia.

Biology. All specimens were taken at light.

Notes. The name refers to the species only really conspicuous feature, the greatly expanded surstylus. In other ways it is a quite typical member of the group. Despite its enigmatic distribution the type series is quite homogeneous and clearly represents a good species.