The generic diagnosis of Euryhapsis Oliver and the description of E. cilium Oliver are augmented. E. fuscipropessp.n. is described as male imago and shown to be close to E. cilium. The systematic position of the genera related toBrillia Kieffer and Eurycnemus van der Wulp is discussed. A review and a key to male and female imagines of generaof the Brillia group with single gonostyli are given. The generic diagnoses of the genera Irisobrillia Oliver, TokyobrilliaKobayashi & Sasa, and Pseudobrillia Niitsuma are augmented or emended. The description of the female imago of T. longicosta Oliver is augmented. T. anderseni sp. n. from Tanzania is described as male and female imago, the description of the male imago of I. Tamamegaseta augmented and the female described. The description of the male imago of P. komorii Niitsuma is augmented.
