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Bethylidae wasp ?

Bethylidae wasp ?
Kamuela, Hawaii County, Hawaii, USA
May 1, 2009
Size: 1mm
These were found as cocoons in a wiliwili tree seed, then a month later they emerged.

Images of this individual: tag all
wiliwili tree seed insects Bethylidae wasp ? Bethylidae wasp ? Bethylidae wasp ?

As for identifying the chalcid wasp, the armoured metallic body, coloration, densely sculptured head and thorax, and distinct parapsidal sutures suggest a pteromalid wasp.

See reference here:

on topic...
Bethylid wasps are primary parasitoids of grubs and caterpillars, so they would not directly threaten the seeds or the endemic tree you mentioned. The bethylid adults first locate and then sting the larvae depositing eggs directly on the body, and then their larvae would emerge and feed on them. After feeding they would pupate and emerge as an adult to complete the cycle. The bronze/green colored chalcid wasp (Fig. 271731) is also parasitic, and in this case may be hyperparasitic, meaning it may lay eggs in the primary parasitoid (e.g. the bethylid pupa), and then its larvae would feed on it, eventually killing it and releasing an adult chalcid wasp. In this case, it's possible that the chalcids emerged from the bodies of the immature bethylids. If bruchid beetle larvae are attacking the seeds, then biological control agents such as parasitoids and predators should be targeted to them since many wasp parasitoids are very picky about the species they go after.


thank you John for the link,
thank you John for the link, yes it is relevant, but we are trying to find out about this wasp that supposedly will prey on the bruchid beetles that are killing the seeds. The wiliwili trees are in a lot of trouble.

The metallic wasp is one of the chalcidoids. Not sure of the family, sorry.

From these?

bethylidae cocoons?
Yes , John from these cocoons.

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