Some important characters used in the key to species a–e petiole in profile view a T. pacificum b T. lanuginosum c T. bicarinatum d T. smithi e T. tsushimae f–h anterior half of first gastral tergite f T. bicarinatum g T. simillimum h T. lanuginosum i–k antennal scape showing pilosity on its anterior margin l–n left hindtibia i, l T. cf. kraepelini j, m T. nipponense k, n T. simillimum o, p configuration of ocelli o T. tanakai p T. cf. kraepelini.