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1 April 2016 The Scramble Competition Mating System of Scolia dubia (Hymenoptera: Scoliidae)
John Alcock
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Males of the wasp Scolia dubia search for emerging females by flying low over the ground in areas, such as lawns, that contain the immature scarab beetles upon which the grubs feed. When an adult female emerges and is discovered by a searching male, other males often join the discoverer, forming a frenzied ball of males around the female. When captured along with these males by an observer, a freshly emerged female continues to attract males even after she has mated, presumably because her scent continues to be detected by other males. Some males of S. dubia also search for mates in shrubs and trees encircling a lawn as shown by the sexual response of these males to a frozen but thawed female placed in a shrub or tree known to be visited by flying males. Male flight activity peaks around midday but then diminishes as the afternoon proceeds.

© 2016 Kansas Entomological Society
John Alcock "The Scramble Competition Mating System of Scolia dubia (Hymenoptera: Scoliidae)," Journal of the Kansas Entomological Society 89(2), 168-173, (1 April 2016).
Received: 9 October 2015; Accepted: 1 April 2016; Published: 1 April 2016
mating competition
scoliid wasp
volatile attractant
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