Diochus

Key to species of the genus Diochus from Papua New Guinea, Vanuatu and Solomon Islands (Figs 1−5) 1 Elytra extremely short, one sixth shorter than pronotum (Fig 5)........................... D. papuanus Cameron, 1939 - Elytra of normal length, about as long as pronotum.......................................................... 2 2 Antennomeres very long; antennomere 3 distinctly elongate, about 5 times longer than wide; body length 5.5−6.1 mm (Fig 2)................................................................................... D. elongatus sp. nov. - Antennomeres shorter; antennomere 3 slightly elongate, about 2 to 4 times longer than wide; body length less than 5 mm .. 3 3 Antennomere 3 more elongate, distinctly longer than antennomere 2; head narrower at posterior angle; tube of spermatheca shorter, slightly coiled (Fig 3)............................................................... D. loebli, sp. nov. - Antennomere 3 less elongate, nearly equal to antennomere 2; head wider at posterior angle; tube of spermatheca longer, strongly coiled (Fig 4)................................................................ D. chambrieri sp. nov.