Key to the genera of Dynastinae in Cuba

1. Mentum strongly expanded, covering bases of labial palpi. Body usually flattened (Phileurini) ............................... 2

- Mentum not expanded, not covering bases of labial palpi. Body not strongly flattened ............................................. 5

2. Body strongly flattened. Elytra distinctly dilated laterally towards apices ..............................Planophileurus Chapin

- Body not strongly flattened. Elytra not noticeably dilated .......................................................................................... 3

3. Apex of metatibia with 3 large teeth. Tubercles or horns of frons located at sides of head ...... Homophileurus Kolbe

- Apex of metatibia with 1–2 large teeth. Tubercles or horns located on sides of head or not ...................................... 4

4. Tubercles or horns of frons located nearer center of head, far from lateral edge. Pronotum lacking fovea or anterior declivity; longitudinal furrow variable, usually lacking 2 small tubercles at anterior end .......... Hemiphileurus Kolbe

- Tubercles or horns located near lateral margin of head. Pronotum with anterior, foveate cavity or broad declivity; longitudinal furrow strong, usually with 2 distinct tubercles at anterior end .................................. Phileurus Latreille

5. Head and pronotum lacking tubercles, horns, carinae, or fovea. Claw with onychium bisetose (Cyclocephalini) .... 6

- Head and/or pronotum (whether males or females) with distinct tubercles, horns, carinae, or fovea. Claw with ony- chium bisetose to multisetose ...................................................................................................................................... 9

6. Clypeus with apex distinctly pointed or narrowly parabolic ............................................................... Mimeoma Casey

- Clypeus with apex rounded, truncate, or emarginate but not distinctly pointed or narrowly parabolic ...................... 7

7. Clypeus transversely subtrapezoidal to trapezoidal in shape ........................................................... Dyscinetus Harold

- Clypeus with apex rounded, truncate, subquadrate or emarginate ............................................................................... 8

8. Propygidium with long setae extending from beneath elytral apices ............................................... Chalepides Casey

- Propygidium lacking long setae extending from beneath elytral apices ...................................... Cyclocephala Dejean

9. Apex of metatibia with distinct teeth. Sexual dimorphism usually distinct (Oryctini). Protibia quadridentate ............ .............................................................................................................................................................. Strategus Kirby

- Apex of metatibia usually truncate. Sexual dimorphism usually not well pronounced (Pentodontini). Protibia triden- tate............................................................................................................................................................................... 10

10. Mandibles with 2–3 teeth. Elytra with rows of punctures. ............................................................... Tomarus Erichson

- Mandibles entire, lacking teeth. Elytra smooth except for sutural stria ....................... Gorditus Ratcliffe, new genus