From what I've researched, I had concluded that the P.Hypochondrialis is the Tiger- or Orange-legged Waxy Monkey Treefrog, and the P. Tomopterna was the Tiger-Legged Lemur Treefrog (due to the lovely stinky reception they make when disturbed).
As for the P.Hypo.Hypo/Hypo.Azurea debate... I have seen/raised/researched both species, and other than very-minimal differences (size/mass, climate, minimal coloration differences), they are virtually indistinguishable.
I would first raise the humidity slightly (around 55-65%) at night, and keep even temps. around 85f during the day as Derek suggested. To keep that temp even, I use a 40-60watt (depending on the temp. of the room/weather/etc) mounted at @ 6 inches from the top of the tank. I also ditched a red nightlamp, and switched to a moonlight/blue filtered one... and they responded rather quickly to that.
I also mist the tank twice or so a day, depending on the humidity, and/or use a half-screen/half-plexi top to control the levels (so it can dry out during the day). During the day, the tank is around 30 or 40%, and at night it's been up to 85% (during a very humid "wet" season, while they were breeding).
P.Hypo/Azurea don't move around all that much in the first few hours of the night, but for a good three or four hours between night and dawn, mine roam around, call the dickens out of each other (including a new call I've recently discovered from the dominant male), and eat me out of 2wk old crickets and fruit flies. One of the younger males is even starting to come into his own, and is trying to enter amplexus with any frog that crosses his path (much to the chagrin of the dominant male, which he always seems to find).