Egg-cellent!

The Easter weekend has now been and gone but for some inexplicable reason we have all come in to work with eggs on the brain (figuratively speaking that is). We don’t often get to see eggs-amples of eggs in the department as they are not often collected, so whilst we have thousands of specimens of adult insects and even a few jeuvenille ones, we don’t have many eggs.
Which is a bit sad in our opinion, as the eggs themselves tend to be egg-ceedingly interesting and beautiful, often have complex sculpturation or construction and can allow you to egg-stract information regarding species behaviours and habitat use.

So here we present some very egg-citing photographs of some eggs-traordinary insect eggs that we did manage to find in the collections. Eggs-amine them closely and see if you can figure out what sort of insect they belong to- answers will be at the bottom of the post.

Picture 1: Technically an egg sac or cluster, this weird shape houses a number of individual eggs belonging to what kind of insect?

Picture 2: Another one containing multiple eggs. Here you can see the individual eggs that are paired up along a central spine. Which kind of insect makes eggs like these?

Picture 3: Only just visible to the naked eye, this tiny egg proves to be beautifully micro-sculptured once you get close up. This photograph had to be taken using a microscoped with camera attachment just so we could show it off. What kind of insect lays an egg like this though?

Picture 4: Okay, so we are repeating ourselves now but this egg ‘sac’ was just too egg-sciting not to photograph! The delicate little wave-formation along one edge demonstrates which kind of insects aesthetic tastes?

Picture 5: Each of these is an individual egg which has been laid in a neat little cluster by which kind of insect?

Whilst you are musing on your answers for the above five questions here are some even more egg-citing photographs for you to study. These are pictures of some mystery eggs. We know that they probably belong to some kind of decapod. They were found attached to a water beetle that was collected in Mozambique. If anyone reading this has any idea about what the egss might be then we would love to know.

Mystery eggs 1: Here you can see that there are small clusters of eggs attached to the underside of the beetle next to it’s coxae.

Mystery eggs 2: We had to take the specimen out of alcohol and dry it off to take the pictures so the eggs look very shiny. If you look really closely you can make out little pairs of eyes in each of the eggs.

Mystery eggs 3: Here’s a real close-up shot. Are those tiny legs and antennae that we can see?

Egg-shausted by eggs yet? Over egg-cited maybe? Ready to egg-splode from all the egg-stravagent egg puns?

Here are the answers to the above quiz questions:

1. Mantid ootheca
2. Cockroach ootheca, in this case belonging to a species of madagascan hissing cockroach
3. Butterfly egg: Order Lepidoptera, Family Lycaenidae.
4. Another cockroach ootheca (we warned you it was a repeat)
5. True bug eggs: Order Hemiptera, Family Belostomatidae. Interesting fact- the males of this family carry the eggs on their backs (the females stick them on there with a water resistent glue) until they hatch.

Egg cluster on the back of a male Belostomatid