8. incisa species-group

(3 species)

Diagnosis. The members of the incisa speciesgroup can be distinguished from other Sagola species-groups by the following combination of characters: body length 2.2–2.9 mm; antennomere 1 approximately 2.5 times longer than wide with dull surface; anterior frontal fovea oval, posterior frontal fovea elongate (Fig. 25g); frontal sulcus reaching length of vertexal fovea (Fig. 25g); gular region of male head with round depression with small process in middle (Fig. 25h: arrow); hind wings well-developed; fore and mid-femur with semicircular depression; mid-tibia bent; male tergite IV with microtrichial patch covering most of the surface; abdominal tergites IV–VI with discal carinae; known from North Island and Three Kings Islands (Fig. 26).

KEY TO SPECIES OF THE INCISA SPECIES- GROUP

The key is based on genitalia because most specimens are indistinguishable based on external morphology.

1. Median lobe of genitalia much shorter than parameres, never reaching midpoint of paramere; parameres asymmetrical (Fig. 25e) ................ S. deformipes Broun

1′. Median lobe of genitalia shorter than parameres but exceeding midpoint of paramere; parameres symmetrical..........2

2(1′). Median lobe of genitalia reaching twothirds level of parameres, phallobase of genitalia rectangular (Fig. 25d); only known from Three Kings Islands (Fig. 26: black circles)................................................ .................... S. incisa Théry and Leschen

2.′ Median lobe of genitalia reaching almost apices of parameres, phallobase of genitalia round (Fig. 25f); only known from Northland (Fig. 26: black square)........................ .................... S. unuwhaoensis new species