Key to Australian Myopias Species

The following key to Australian Myopias is modified from Willey & Brown (1983).

1

• Mandibles triangular, with distinct basal and masticatory borders meeting at a toothlike angle; when fully closed, the blades overlap broadly, leaving only a narrow space between them near the head => Myopias delta

• Mandibles thin and elongate, with basal margin not distinct from masticatory margin, or meeting it at a low convexity or flange; blades separated by a broad gap basally (near the head) when fully closed => 2

2

• Second gastral segment (T4) lower and narrower than the first and tapering gently apicad, not constricted at juncture with first => Myopias densesticta

• Second gastral segment as wide as or wider than first, with distinct basal constriction at its juncture with first => 3

3

• Antennal scape longer (scape length greater than 0.84 mm), in full face view always surpassing posterior border of head when held straight back => Myopias chapmani

• Antennal scape shorter (scape length less than 0.84 mm) (in full face view sometimes not reaching posterior border of head when held straight back) => 4

4

• Petiolar node as seen from the side tapered apicad, with the highest point in front and the dorsal face sloping downward caudad; robust species, dorsoventral thickness of head as seen from the side 0.61 mm or slightly more => Myopias tasmaniensis

• Petiolar node as seen from the side subquadratic, dorsal face convex but horizontal, distinct from both nearly vertical front and rear faces; slender species, dorsoventral thickness of head as seen from the side usually < 0.61 mm => Myopias tenuis