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Hey friends

puparium preserved in formaline/alcohol (5 years old), collected in freshwater stream
larva present in one but so breakable it was impossible to manipulate it
an adult (?) present in the darker one

Length of the puparium 3.2 mm
this one with the adult inside



lateral and dorsal view of 2 pupae



Tip of the anal segment (siphon ?)




spicules on each abdominal segment VV



First segment tip (where the cephalopharyngeal skeleton is fixed inside) Frontal view









cephalopharyngeal skeleton very simple





the adult (?) DV links VV right




merci for the attention
SDS

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Yes, these are the puparia of hydrellia. However, there are parasitic hymenoptera, possibly Ichneumonidae in the skin. Many hydrellia are parasitized, usually only 50% or so contain the fly. The posterior spiracles are 2 pointed elongations to pierce the plants' parenchym for oxygen uptake.

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Thanks
Do you mean that this adult is not Hydrellia...
I can believe as I'm a beginner and I dont'know really what happens outside the water
But Ichneumonidae have 4 wings, two anterior and two posterior and here
there is only 1 pair Wings pad

But the antennae of Hydrellia are really not so long !!

I have a picture of the mouth.. perhaps this will confirm Ichneumonidae
I will post it in a moment

SDS

SDS

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The adult is definitely no fly but a parasitic wasp.

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merci Atylotus

I try to understand what happened.
If the pupa has traces of larvae Hydrellia spicules, if the pupa has the shape of a pupa Hydrellia, if it is found in the pupa a cephalopharyngeal skeleton of the larvaa attached to the front tip of the pupa, I have to think that the larva existed to the end of his development.
When therefore the parasitism? The wasp lays its eggs in the larva and an egg grows and develops digesting what is in the pupa before itself becoming an adult as seen in the photo?


I have found an answer
here http://entnemdept...mbiana.htm

merci

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After a better observation (and dissolution of CHOH polymers stiking the organism)

I have to apologize, the adult insect (wasp) had 2 pairs of wing pads

A better picture of the head of Hydrellia




SDS