larve removal

[pdmattox]

yesterday i was observing a hive and i notice a larve being removed.  I have'nt seen any more being removed. what is happening.

[Summerbee]

Could've been dead, diseased...  As long as you only see the occassional one being disposed of it is probably fine.

[Brian D. Bray]

What stage? The development stage of the brood being tossed, as well as quanity and/or frequency, can tell you a lot about the health of your hive.  
If it is very sporadic and in small numbers it's probably nothing to worry about as bees have miscarriages also.  
If there's a noticable amount of brood tossed from the hive it's time to investigate and check for all brood diseases like sacbrood, chill brood, chalkbrood, AFB, & EFB.