Sorry but we don’t have anything new to tell you about this. This stem looks like it could be mealybug or woolly aphid (see the link below) but as we said previously the other photo with the organisms(?) lined up in rows does not. Its possible the other photo is of some kind of pupal stage (cacoons) of a beneficial fly or wasp, but they typically lay their eggs on the backs of caterpillars, not on plant parts. Again, we suggest you contact local professionals and either provide them with photos or live samples sealed in a bag. If you think these are pests causing plant damage, you could use horticultural oils or pesticidal soaps. If you think they’re not damaging pests, then you can leave them alone and observe them, or put them in some kind of enclosed bug box, butterfly cage, etc. We would like to know what you find out. Sorry we can’t be of more assistance, but there are millions of insect species, all with various life stages that take different forms and we just haven’t come across these yet, if in fact they are insects.
http://www.ipm.ucdavis.edu/PMG/GARDEN/PLANTS/INVERT/woolaphids.html
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