Thanks for all the well-wishes (and sympathy) to all of you. I truly do appreciate it.
As heatbreaking as it is to deal with this and to even write about it, that is the very reason I am doing it, which is to document things for future breedings/incubations. If people wonder why I and others say that the Melleri are such a tough species to breed, well here you have exactly why. While Melleri Discovery is a great resource, it is truly outdated and there are only just a handful of people that have actually recorded their findings. It just sucks that there has to be such a large array of variables for such a fine and wonderful species. I guess it would be one thing to have them die off after one or two months, but to have them go to full incubation and to be fully developed inside the egg, just to have them go through the normal routine of hatching out and then for it to end like that is probably the worst disappointment I've ever had. It would also be different if it were a species that I deal with a lot, such as panthers, because I know that there will be others. I have no guarantees with this pair that they will ever breed again nor that, despite the fact that Newbie is quite the egg-layer, that she will ever lay another clutch. And thus comes the extreme frustration with trying to breed this species.
Anywho..... all is not totally lost just yet. I took 2 of the containers and put them upstairs where it is 78 degrees. Most of these eggs are the worst. These are the ones where I get the most disappointed. These eggs didn't really sweat much but the eggs turned almost translucent (similar to the Gesang's (Megana's) eggs when I saw them last fall before they hatched) and I can actually see the fully formed baby melleri inside (and the stripes are incredible!). Some of these eggs have started to shrivel and die off. Part of me wants to open them anyway but per Mike and the fact that in the ones I have opened the yolk sak is still in tact, I should just leave them alone. And the last one that I did that to, a lot of the "amniotic" fluid came out, which told me that perhaps the baby wasn't quite done cooking, despite the egg looking so poor. Ironically enough, these 2 containers are the ones that originally contained the perlite so again, there is another variable, although Flux used perlite with all of his, so maybe not.
The other 2 containers are still downstairs where the temps have been a solid 74.3 - 74.6 degrees even with the current heatwave. Most of these eggs were really fabulous looking before they started sweating. They all (except for a few) sweated for 2-3 days and then just stopped. The eggs haven't died/shriveled and yet they don't look like the other ones upstairs. While they don't look nice and white and healthy like they used to, they are still somewhat decent looking. These are the ones that I am hoping for the most.
So, based on what I have seen thus far, there could be a few different variables. Substrate, incubation temperatures, health of the mother, health of the sperm (this hasn't been mentioned, but I'm sure it could have something to do with it), overall health of the egg/baby, Mother Nature (I'd like to give her a piece of my mind sometimes....) and throw in a little luck, too.