Key to species

1. Origin of vein M 1 distal to origin of R 2+3; (Figs. 7–8); R-fork long.......................... M. longifurca new species

- Origin of M 1 close to origin of R 2+3 (Figs. 5, 6, 9); R-fork short................................................. 2

2. Costal sector 1 (distance along costa from humeral crossvein to R 1) only slightly longer than 2 (distance along costa from R 1 to R 2+3) (Figs. 5–6); Rs expanded distally, much thicker than costa.............................. M. caribbea new species

- Costal sector 1 approximately 2x sector 2 (Fig. 9); Rs only slightly expanded, not increased in size distally (Fig. 9)......................................................................................... M. pacifica new species