1 Males shorter than 5.0; width maximum 1.1−1.4.........................................................................................................2

- Males longer than 6.5; width maximum 2.0−2.2.......................................................................................................... 4

2 Ventral surface of mesotrochanter with a median nodule (Fig. 14). Male length 4.1−4.2; width maximum 1.1−1.2. Hemelytral process not extending to tip of membrane. ................................................................................... M. chinai

- Ventral surface of mesotrochanter without a median nodule. Length and width of male according with species. Hem- elytral process depending species................................................................................................................................. 3

3 Hemelytral process usually extending to tip of membrane (Fig. 15). Male length 4.1−4.2; width maximum 1.1−1.2. ............................................................................................................................................................ M. membranacea

- Hemelytral process not extending to tip of membrane (Fig. 16). Male length 4.77 width maximum 1.37... M. pacifica

4 Male length 7.06, width maximum 2.2. Hemelytral process not extending to tip of membrane (Fig. 4). Female with a preapical spine in middle femur (Fig. 5) .................................................................................................... M. lofoides

- Male length 6.93, width maximum 2.04. Hemelytral process not extending to tip of membrane (Fig. 2). Female lacking a preapical spine in middle femur .......................................................................................................... M. awa