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1 Antennae with 13 articles, abdomen with seven visible terga, males 2
1’ Antennae with 12 articles, abdomen with six visible terga, females 3
2 Malar space longer than midocellus diameter, submarginal cell II shorter than I on media, tergum I narrower than II
Dryudella
2’ Malar space short, base of mandible nearly touching lower eye margin, submarginal cell II longer than I on media, tergum I as wide as II Astata
3 Pygidial plate bordered with stout, recurrent marginal spines, submarginal cell II as long as or often longer than I as measured on media
Astata
3’ Pygidial plate not bordered by stout spines; submarginal cell II short, not more than 0.75 length of I Dryudella |
