. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 31a b Figs 27-31: Monolepta ronbeeneni sp. n. 27: colour pattern; 28: basal antennal articles (a: S, b: $); 29: three different sper- mathecae; 30: bursa-sclerites (a: dorsal, b: ventral); 31: median lobe (a: lateral, b: dorsal from Albertine Rift, c: dorsal from west- ern Central Africa, d: ventral, without endophallic structures). Abdomen. Yellow to yellowish-red. Female genitalia. Spermatheca with small spherical nodulus, comparatively broad middle part and long,
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 31a b Figs 27-31: Monolepta ronbeeneni sp. n. 27: colour pattern; 28: basal antennal articles (a: S, b: $); 29: three different sper- mathecae; 30: bursa-sclerites (a: dorsal, b: ventral); 31: median lobe (a: lateral, b: dorsal from Albertine Rift, c: dorsal from west- ern Central Africa, d: ventral, without endophallic structures). Abdomen. Yellow to yellowish-red. Female genitalia. Spermatheca with small spherical nodulus, comparatively broad middle part and long, strongly curved cornu (Fig. 29). Dorsal part of bursa sclerites small, elongated triangular (Fig. 30a), ventral part very broad (Fig. 30b). Male genitalia. Median lobe straight, very slender at apex, in specimens along the Albertine Rift apex slightly enlarged (Fig. 31b), specimens from western Central Africa apex parallel-sided (Fig. 31c). Tectum comparatively broad, ventral groove parallel-sided (Fig. 3Id). Dorsal pair of median endophallic spiculae very strong, other median spiculae slender, ventral spiculae absent, lateral spiculae with large U-shaped apex (Fig. 31b), which is slenderer in most specimens from west- ern Central Africa (Fig. 31c). Distribution. Forests and savannas of northern Central Africa from northern and the Central African Republic to Uganda and Rwanda (Fig. 32). Diagnosis. Monolepta ronbeeneni sp. n. is one of the smallest afrotropical Monolepta species. It is equal in size and antennal characters to M. wittei Laboissiére, 1940, a species which differs in having throughout yel- lowish-red elytra, a black apical abdominal segment, very different male genital characters, and is restricted to Lake Kivu region at the Albertine Rift (WAGNER 2002). Monolepta buquetii can be easily distinguished by the short basal antennomeres, the short antennae, broader pronotum, it has no reddish-yellow elytral col- oration and does not occur along the Albertine Rift. O
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