18. anisarthra species-group

(5 species)

Diagnosis. Members of the anisarthra speciesgroup can be distinguished from other Sagola species-groups by the following combination of characters: body length 2.3–3.2 mm; antennomere 1 approximately 2 times longer than wide; ventral surface of head weakly convex, but not modified (Fig. 45m); anterior frontal fovea round and partially covered by frontal rostrum, posterior frontal fovea oval (Fig. 45l); hind wings well-developed; abdominal tergites IV–VI with discal carinae.

KEY TO SPECIES OF THE ANISARTHRA SPECIES- GROUP

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

1. Abdominal ventrite VII deeply emarginate, surrounded by dense setae........................ 2

1′. Abdominal ventrite VII normal..............3

2(1). Antennomeres 9–10 transverse; elytra triangular, as long as wide; hind wings reduced to small pads ............................ .............. S. wairarapaensis new species

2′. Antennomeres 9–10 subquadrate; elytra rectangular, longer than wide; hind wings fully developed ..... S. clarkei new species

3(1′). Antennomeres 4–6 enlarged; frontal sulcus deep (Fig. 45l); eye larger, one-half length of temple (Fig. 45l) ................................... ................................. S. anisarthra Broun

3′. Antennomeres 4–6 normal, with tubercles; frontal sulcus shallow; eye smaller, onethird length of temple.............................. 4

4(3′). Median lobe of genitalia slender, as wide as paramere (Fig. 45g –h) .......................... ............................... S. planipennis Broun

4′. Median lobe of genitalia at least 3 times broader than paramere (Fig. 45i) .............. ........................ S. townsendi new species