1. Distal margin of each palpal lobe divided into 3 sharp processes, the outermost one much shorter than the movable hook; caudal gills with 2 well-defined, dark crossbands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Archilestes grandis
Distal margin of each palpal lobe divided into 4 processes--three sharp hooks and a short , serrate, truncate projection between the 2 outer hooks, the outermost hook reaching almost as far distad as the tip of the movable hook; caudal gills never with 2 distinct and complete dark crossbands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lestes