Well, they're definitely NOT sulphur eggs! :)
They have that sunken-in-the-middle look like the eggs of a big silk moth, like maybe a cecropia moth? But cecropia moths don't use cassia, at least as far as I know.
I'd sure keep them to see what hatches. They may be some undesirable insect, but if they're cecropias, you could feed them the cassia or wild cherry or any of a long list of host plants for cecropia moth cats and have some gorgeous big moths next year.
Sherry

Here is a link that might be useful: Cecropia Moth Eggs

Thanks Miss Sherry! That would be quite cool! I will keep my eye on them. Unfortunately they'll probably hatch during the week while I'm at work, but maybe I'll get lucky. Hope to let you know soon!

Sennas, or Cassias, are also known larval host plants for the Black Witch moth, which is very large moth as well. I cannot find any silk moths that use Cassia, altho that is not outside the realm of possibilities because many are "generalists" and use a huge range of plants.

Susan

Thanks! Unfortunately I found the eggs on the ground today. Either the wind did it, or one of my felines did it. I have them in a jar now, waiting to see what comes out.

Ooh, Nancy, be sure to post what emerges. I know I am curious about them!

Susan

Really nice shot of those eggs Nancy!! I am curious about what emerges from them too. I have a little tiny Western Sand Cherry, and I noticed the other day that is is covered in frass, and the leaves are chewed. I eventually found a little inchworm of some sort on the plant. I guess a lot of people would be mad that their plant was eaten, but I felt really happy that I had provided some food for another creature. Guess that is what makes us a little different.~~Angie

Black Witch moths would be awesome. You are in the right area for them.

Please do keep us informed.

So here we go!

{{gwi:464834}}

And then they all went down the Cassia single-file or close to it.

{{gwi:464835}}

Could they be one of these, whatever this is?

{{gwi:464836}}

Let me know what you think! Thanks!

Fascinating! Hope someone figures out your mystery.

I think they're io moth hatchlings, Nancy.
They're yellow when they hatch, at that point I don't think they sting, and they march all in a row - about 50 of them marched right across my butterfly cages years ago, so I got as many of them as I could and raised them myself. Io moths will lay their eggs on and thrive on most any plant.
Here's a link that shows the entire life cycle, including the hatchlings.
Sherry

Here is a link that might be useful: Io Life Cycle

Wow Miss Sherry! That is what they appear to be! And I did touch them. Won't do that again if I discover where they went! I hope the few stragglers caught up to the rest. It was by the time I got the last one on the plant I realized most were heading down the trunk of the cassia. I don't recall ever seeing one of those moths before. I hope I can keep an eye on them. Thanks so much for your help!!

Is that not the most fascinating thing you've ever seen! Really, really cool! Great going, MissSherry!

Have fun, Nancy, if you decide to hand raise - errr, with gloves, preferably!

Susan