S. Length of fore wing veins 2RS/2M: 0.9?.0. Length of fore
S. Length of fore wing veins 2RS/2M: 0.9?.0. Length of fore wing veins 2M/(RS+M)b: 1.1?.3. Pterostigma length/width: 3.6 or more. Point of insertion of vein r in pterostigma: clearly beyond…