Strategus, Kirby 1828: 644 (Kirby and Spence, 1828

Alvarez, Héctor Jaime Gasca, da, Claudio Ruy Vasconcelos, Fonseca & Ratcliffe, Brett C., 2008, Synopsis of the Oryctini (Coleoptera: Scarabaeidae: Dynastinae) from the Brazilian Amazon, Insecta Mundi 2008 (61), pp. 1-62 : 43

Key to the species of adult Strategus of Brazilian Amazonia

1. Clypeus with apex emarginate, slightly reflexed. First segment of posterior tarsus usually triangular, apex slightly attenuated into acute angle ( Fig. 86 ) ............................................... 2

— Clypeus with narrow, slightly acuminate apex. First segment of posterior tarsus elongated and quadrangular ( Fig. 98 ) ............................................................................................................. 3

2(1). Sides of elytra usually smooth, without punctures or with small punctures behind humerus ( Fig. 84 ) .......................................................................................................... S. aloeus (Linnaeus)

— Sides of elytra with 1-3 rows of small to large, ocellate punctures behind humerus ( Fig. 103 ) .... ............................................................................................................ S. validus (Fabricius)

3(1). Punctures on disc of pronotum and elytra small. Pygidium usually with a small, medioapical band of setigerous punctures. Amazon River south to Argentina.............................................. ........................................................................................ S. surinamensis hirtus Sternberg

— Punctures on disc of pronotum and elytra minute to very small. Pygidium without a medioapical band of setigerous punctures. Amazon River north to Venezuela.............................................. ........................................................................ S. surinamensis surinamensis Burmeister

Figures

Figure 80-88. Strategus aloeus. 80) Habitus. 81) Male head (dorsal view). 82) Male major. 83) Male minor (scale line: 5 mm). 84) Elytra (lateral view). 85) Male major. 86) Male minor (scale line: 5 mm). 87) Parameres frontal view. 88) Parameres lateral view (scale line: 1 mm).

Figure 95-100. Strategus surinamensis surinamensis. 95) Habitus. 96) Male head (dorsal view). 97) Male head and pronotum (lateral view). 98) Metatarsus (scale line: 5 mm). 99) Parameres frontal view. 100) Parameres lateral view (scale line: 1 mm).

Figure 102-105. Strategus validus. 102) Male head and pronotum (scale line: 5 mm). 103) Elytra (lateral view). 104) Parameres frontal view. 105) Parameres lateral view (scale line: 1 mm).