The new sp. is described and illustrated from 2 i. Holotype 6: Lamdong prov., Bao Lok to Ho-Chi-minh Rd, 15-VI-1996; deposited in Author’s institution. It is similar to M. loogali Fraser, from northern Burma, from which it is easily distinguished by the longer inner superior appendages, and by strongly bent, bifid inferior appendages. This is the first member of the genus recorded from Vietnam.