They look like scale insects to me. You may have to get some spray to treat the orchids. Make sure you spray the leaves outside, though - and shield the flowers.

Mealybugs, Spritz. Same treatment as for scale, though. Be extra thorough in spraying, Lmg, because they hide in the doggonedest places!

Thanks this a great help - looks like a trip to a garden centre to find a spray - theres always a good excuse and normally end up coming out with with everything but what I first went in there for!!

Ooops! Thanks, Tug.