Xyphon

Key to the species of Xyphon 1. Forewing apex densely reticulate, with more than 15 cells (Fig. 3 A)............................................. 2 -. Forewing apex not densely reticulate, with few crossveins creating regular cells (Fig. 3 C)............................ 3 2 (1). Distance between ocelli more than 7 times width of ocellus in dorsal view (Fig. 4 B); distance from ocellus to margin of head more than 2 times width of ocellus (Fig. 4 B); California.......................................... Xyphon fulgidum -. Distance between ocelli less than 7 times width of ocellus in dorsal view; distance from ocellus to margin of head less than 2 times width of ocellus; United States east of Rocky Mountains, Mexico.............................. Xyphon flaviceps 3 (1 b). Crown and pronotum without dark markings (Fig. 4 D); southwestern United States, Mexico............... Xyphon nudum -. Crown and pronotum with one or more dark spots (Fig. 4 H).................................................... 4 4 (3 b). Crown concave in lateral view (Fig. 3 C).................................................................... 5 -. Crown convex or flat in lateral view (Fig. 3 A)............................................................... 6 5 (4). Hind femur macrosetal formula 2 +0; Colorado and Arizona........................................ Xyphon gillettei -. Hind femur macrosetal formula 2 + 1; Mexico............................................. Xyphon spadice sp. nov. 6 (4 b). Head with single black spot near anterior margin of crown (Fig. 4 H), lacking other dark markings (Fig. 4 H); clypellus in pro- file evenly convex, continuing contour of frontoclypeus (Fig. 3 F); western United States.............. Xyphon triguttatum -. Head usually with more dark areas than single spot near anterior margin of crown (Fig. 4 F); clypellus in profile with ventral half forming angle with dorsal half and frontoclypeus (Fig. 3 E); southern United States south through Brazil, Caribbean islands, introduced into western Africa, and various Pacific islands including Hawaii, Guam, Taiwan, and Japan................................................................................................... Xyphon reticulatum