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Photo#188221
Hemileuca eglanterina caterpillar with parasitic grub - Hemileuca eglanterina

Hemileuca eglanterina caterpillar with parasitic grub - Hemileuca eglanterina
Glen Ellen, Sonoma County, California, USA
June 6, 2008
Size: 1 cm
Hemileuca eglanterina caterpillar with parasitic grub

I found four H. eglanterina caterpillars two weeks ago and was looking forward to shepherding them through the cocoon stage of their live but only have one live one left. They all have been acting to lethargic and it seem they should have spin cocoon last week. This morning I found the third one dead and next to it was this white grub which must have been eating the caterpillar form the inside out.

Images of this individual: tag all
Hemileuca eglanterina caterpillar with parasitic grub - Hemileuca eglanterina Hemileuca eglanterina caterpillar with parasitic grub

Moved to species level for the moth
any idea on the grub ID?

 
Tachinid
Looks like a tachinid pupa.

wow!
This is pretty fascinating. I have only seen wasp larvae do this type of thing, but 1 cm seems a little large. Are you going to try to rear the parasitoid larva to see what did this to your caterpillars?

 
grub
Hello Bobby:

I just posted a picture of the pupa which formed the first day the grub emerge from the caterpiller. I will hatch it out and post a picture of the adult.

Richard

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