6. parva species-group

(2 species)

Diagnosis. The members of parva group can be distinguished from other Sagola groups by the following combination of characters: body length 2.3–3.8 mm; antennomere 1 approximately 2.5 times longer than wide with dull surface, male antennomeres 5–6 enlarged (Fig. 21e); gular region of male head with round depression (Fig. 21g); hind wings well-developed; fore-femur with semicircular depression; abdominal tergites IV–VI with discal carinae; present on North Island, not known from South Island (Fig. 22).

KEY TO SPECIES OF THE PARVA SPECIES- GROUP

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

1. Head bluntly triangular with large eyes (Fig. 21a, f); antennomeres 5–6 enlarged, without tubercles................. S. parva Sharp

1′. Head transverse with small eyes (Fig. 21b); antennomeres 4–6 enlarged, with distinctive tubercles ........................ S. denticollis Broun