Pristoderus productus (Reitter, 1877) comb. n.

(Figs 2 f, 4f, 6f, 8f)

Illestus productus Reitter, 1877b: 134 . In Sparactus: Blackburn, 1902: 316 .

Sparactus costatus Blackburn, 1891: 117 . Synonymy by: Blackburn 1902: 316.

Types. Lectotype of productus: Australia (MNHN, here designated)

Lectotype of costatus: South Australia (BMNH, here designated)

Paralectotypes of costatus: South Australia, Blackburn (2, SAMA, here designated) .

Other specimens examined. Australia, Blackburn coll. (1, SAMA).

Australian Capital Territory: Black Mt, 1.iv.30 [Ga: 35.267S 149.100E] (1, ANIC); 35.24S 149.06E, Monash, 16.viii.1987, W. & T. Dressler, under bark (1, ANIC).

New South Wales: E.W. Ferguson (2, ANIC).

South Australia: Blackburn (3, SAMA); 34.21S 139.29E, Brookfield Con. Pk. Campsite, 3-12.ix.1991, under mallee bark, Lawrence, Weir & Dressler (1, ANIC); 34.21S 139.29E, Brookfield Con. Pk. Campsite, 30.iii-12.iv.1992, at light, A. Calder & W. Dressler (1, ANIC); Karoonda, E.W. Ferguson [Ga: 35.094S 139.898E] (1, ANIC); Koonamore Osborne Res Easlem., 5.iv.1979, under Mulga, P.J.M. Greenslade [Ga: 32.064S 139.384E] (1, SAMA); Mt. Lofty Rgs [Ga: 34.974S 138.709E] (1, SAMA); Monarto Sth, 26.xii.1972, Colydiidae under bark of Euc. incrassata, P. McQuillan [Ga: 35.122S 139.129E] (1, SAMA); 11 km S of Paruna, 9.ii.1970, ANIC Berlesate No. 245 Poor Mallee, R.W.T. [GE: 34.803S 140.741E] (1, ANIC); 35.16S 140.55E, Pinnaroo, v.1989, C. Reid, Acacia, Cassia, Euc. (1, ANIC).

Tasmania: A. Simson (2, SAMA); Blackburn (1, SAMA); Cambridge, 21.ii.1967, A. Neboiss [Ga: 42.838S 147.442E] (1, NMV); Hobart, Lea [Ga: 42.882S 147.323E] (4, SAMA; 2, NMV); Launceston, 20.iv.22, Lea [Ga: 41.442S 147.145E] (1, NMV); Launceston [Ga: 41.442S 147.145E] (4, SAMA); Launceston, Lea [Ga: 41.442S 147.145E] (1, SAMA); Launceston, F.M. Littler [Ga: 41.442S 147.145E] (4, QMBA); New Norfolk, Lea [Ga: 42.781S 147.059E] (1, NMV).

Victoria: Birchip, 6.vii.02 [Ga: 35.981S 142.916E] (1, NMV); Fitzroy River, 1928, B.M. [Ga: 38.162S 141.709E] (1, ANIC); Grampians, C. Oke [Ga: 37.140S 142.364E] (3, NMV); Inglewood, C. Oke [Ga: 36.573S 143.868E] (2, NMV); Quantong, ix.1928, A.D. Selby [Ga: 36.731S 142.017E] (2, ANIC); Sea Lake, Goudie [Ga: 35.495S 142.850E] (2, SAMA; 2, NMV).

Western Australia: Beverley [Ga: 32.109S 116.926E] (2, SAMA); Garden I., Lea [Ga: 32.204S 115.675E] (2, SAMA); King George Sound, E.W. Ferguson coll. [Ga: 35.049S 117.934E] (3, ANIC); Kings Park, pitfall trap, 20– 27 Apr 1998, E. Ladhams [Ga: 31.957S 115.835E] (4, WADA); Pinjarra, Goerling [Ga: 32.630S 115.871E] (1, ANIC).

Diagnosis. This species is distinct from all congeners with pronotum widest anteriorly and strongly narrowing posteriorly, elytral costae distinctly raised and not interrupted.

Redescription. Body length: 4.5–5.5 mm.

Body distinctly flattened, elongate (ratio max length/max width: 2.81–3.06); colour dark brown; body vestiture consisting of very short, recumbent whitish setae; setae sparser and more erect on antennae, dense on club.

Head transverse; supraorbital carina raised, distinctly sinuate; supra-antennal carina slightly raised and edge entire, not indented; eyes protruding with short, squamiform interfacetal setae; angulate protrusion between antennal insertion and eye, visible in lateral view; antennal insertion ventral, just below the edge of supra-antennal carina; antennae 11-segmented with a distinct 3-segmented club; antennomeres I–III subcylindrical; I distinctly wider and slightly longer than II; II about as long as III; IV–VIII very short and simple; IX–XI distinctly transverse to form a loose club.

Pronotum transverse (pronotal length/width: 0.62–0.69), narrower than elytra, without prominent median process; margins distinctly denticulate, slightly indented at middle; maximum width at anterior angles, with one angulate lobe, directed anteriorly; sculpture of pronotal disc as in Fig. 2 f.

Elytra about twice as long as wide (elytral length/width: 1.88–2.05), with lateral margins straight and smooth; tubercles on elytra absent; 3rd, 5th and 7th intervals costate; costa on 3rd interval entire.

Distribution and habitat occurrence. SW Western Australia, SE South Australia, Victoria, Tasmania, New South Wales and Australian Capital Territory (Fig. 10 d); open forest as well as mallee and mulga in South Australia and Victoria.