![](https://hoverflylagoons.co.uk/wp-content/uploads/2020/07/1019788-1024x768.jpeg)
While this could be a one-off i.e. the work of a single confused female, I was delighted to discover three Rhingia rostrata pupae in one of my grass-filled Lagoon’s pupation tray! It was discovered among many Myathropa florea pupae, and due to it’s small size and shape, could easily be overlooked (see images below).
![](https://hoverflylagoons.co.uk/wp-content/uploads/2020/06/1019670-1024x768.jpeg)
As you can see, R. rostrata‘s much smaller pupa, lacking a breathing tube, could very easily be missed when searching pupation trays, so DO try and look out for these! These were collected on 23rd June.
![](https://hoverflylagoons.co.uk/wp-content/uploads/2020/06/rhingia-pupa2-1024x576.jpg)
![](https://hoverflylagoons.co.uk/wp-content/uploads/2020/06/1019606-1-1024x651.jpeg)
This species turned up in (was attracted to) a very dense Lagoon I created on 4th April as an experiment to determine how fast densely packed Lagoons take to rot down to liquid, and if a different suit of hoverfly species might be attracted to dense versus more liquid Lagoons.
![](https://hoverflylagoons.co.uk/wp-content/uploads/2020/06/1019628-1024x768.jpeg)
![](https://hoverflylagoons.co.uk/wp-content/uploads/2020/06/1019651-1024x768.jpeg)
This species’ larval and pupal stages have not yet been described, we know very little about where the larval stage develops. So this is a particularly exciting discovery.
All 3 emerged within days of each other, two males (27th and 29th June) followed by one female (1st July). I fed them honey / water solution, and offered them flowers.
![](https://hoverflylagoons.co.uk/wp-content/uploads/2020/07/Feeding-solution-1024x576.jpg)
![](https://hoverflylagoons.co.uk/wp-content/uploads/2020/07/Feeding-flowers-1024x576.jpg)
![](https://hoverflylagoons.co.uk/wp-content/uploads/2020/07/side-view-1024x576.jpg)
![](https://hoverflylagoons.co.uk/wp-content/uploads/2020/07/top-vew-male-female-1024x576.jpg)
One R. rostrata female was recorded feeding on red campion in the same garden on 19th May, perhaps this was the one that oviposited a few eggs in this Lagoon which was metres away, see her below.
![](https://hoverflylagoons.co.uk/wp-content/uploads/2021/01/IMG_3160-768x1024.jpg)
Whether it was the flowers or the Lagoon that attracted this species, either way both were visited and both are likely important, so get gardening for hoverflies!