Couplet 184

184a:  Tarsus without lobes on penultimate tarsomere; sutural stria deeply impressed near apex of elytra, distinctly more so than in basal half; 2 basal ventrites connate; hind tibia longer than first tarsomere; length 7-13 mm

Synchroidae   p. 437

184b:  Either tarsus with penultimate tarsomere lobed beneath, or hind tibia shorter than first tarsomere; if sutural stria deeply impressed near apex, then also impressed on basal half; length 2-20 mm