Sinclair: Hydropeza empidid flies of Australia 
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Table 2. Characters used in the analysis of Hydropeza. 
1 Body colouration: brown to black (0); clothed in distinct blue pruinescence (1) 
2 Postpedicel: with apical stylus (0); lacking apical stylus (1) 
3 Face: bare (0); setose (1) 
4 Prosternum: separate (0); fused to proepisternum (1) 
5 Antepronotum: with pair of setae (0); setae greatly reduced, slender or absent (1) 
6 Acrostichals: full length of scutum (0); absent or greatly reduced (1) 
7 Stigma: present (0); absent (1) 
8 Subcosta: complete (0); incomplete (1) 
9 bm-m: complete (0); abruptly terminated, incomplete (1) 
10 Male midfemur: posteroventral row of setae absent (0); posteroventral row of setae at base (1) 
11 Male mid tibia: row of setae absent (0); row of spine-like ventral setae on apical third (1) 
12 Male mid tibia: apical spur-like seta absent (0); apical spur-like seta present (1) 
13 Male hind femur: slender (0); inflated, broader than fore and mid femora (1) 
14 Male hind trochanter: lacking spines (0); 1-2 spine-like setae present (1) 
15 Male tarsomere 4 of fore- and midlegs: unmodified (0); apex flattened and expanded (1) 
16 Tarsomere 4 of hindleg: unmodified (0); keel-shaped (1) 
17 Tarsomere 5 extension: absent (0); present (1) 
18 Epandrial lamellae: not separated (0); narrowly and weakly connected (1); distinctly separated (2) 
19 Posterior cercus: lacking brush of setae (0); brush of short, peg-like setae (1) 
20 Hypandrium: without prolongation (0); prolonged into tapered phallic guide (1) 
21 Cercus shape: unbranched (0); posterior section forked (1) 
22 Postgonites: appressed or fused to phallus (0); short, finger-like (1); articulated (2); arched 
medially to opposite pgt and appressed or fused (3) 
