19. socia species-group

(5 species)

Diagnosis. Members of the socia species-group can be distinguished from other Sagola speciesgroups by the following combination of characters: body length 2.2–2.8 mm; antennomere 1 approximately 1.5–2.0 times longer than wide; anterior frontal fovea oval and mostly covered by frontal rostrum, posterior frontal fovea oval (Fig. 47k); hind wings well-developed; abdominal tergites IV–VI with discal carinae; median lobe of genitalia divided vertically, major lobe partially covering minor lobe (Fig. 47f–j).

KEY TO SPECIES OF THE SOCIA SPECIES- GROUP

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

1. Antennomere 7 enlarged, at least twice as long as 8..................................................2

1′. Antennomere 7 normal or larger but not exceeding twice length of 8....................3

2(1). Elytra rectangular, hind wings fully developed ..................... S. socia Broun

2′. Elytra subquadrate, hind wings reduced to small pads.................................................. ................ S. kahurangiensis new species

3(1′). Antennomeres 8–10 enlarged, bearing distinctive tubercles; ventral head simple ......4

3′. Antennomeres 8–10 normal; ventral surface of head with inverted triangular process bearing dense setae behind mouthparts ......... S. canterburyensis new species

4(3). Eye one-third length of temple; antennomeres 5–10 normal.................................... .................. S. solodovnikovi new species

4′. Eye as long as temple; antennomeres 5–10 enlarged ......... S. bullerensis new species