I'm not sure about white mosquito larvae, but giving your pet a varied diet is always important. I'd recommend you worry about adding several different feeders to your pet's diet, that way you don't really need to worry about nasty side effects due to overfeeding a single feeder.
Personally, without knowing how big your lil guy is, I'd recommend at least Grindal Worms. They are cultured on coco coir and can feed on everything, but I personally like to use slightly moistened end pieces of the bread I buy, and they seem to love it. We have them for sale on SmallPetFeeders.com if it's convenient for you.
http://www.smallpetfeeders.com/157-grindal-worms
If you've got a super small one, like 1.5" or smaller, then I'd recommend Vinegar eels and Microworms. Vinegar eels culture in a 50/50 apple cider vinegar mix, and Microworms in oatmeal basically. Both are super easy to care for, and would give you another 2 options for the diet regimen, but they are both very small, and suitable only for insect eating plants, fish fry, and super small aquatic frogs.
If he's big enough, then I'd recommend Red Wigglers, which are awesome for composting too by the way. They can be kept at room temperature, and fed food scraps until you feed them all off, or they'll actually reproduce if you just add a lil peat moss or coco fiber.
You've got a bunch of options, and really shouldnt limit to a single feeder, no matter what it is. Hope this helps :-)
-Dave