The preproduction aircraft doesn't have a probe, and while one could be added, it would only increase the weight and complexity a bit more.
Also, the Russians don't seem to have placed nearly our emphasis on aerial refueling: I can find reference to only one Air Regiment of Il-78 Midas tankers currently in operation.
This must be a holdover from the days when they were afraid of defectors flying off with their planes! Apparently, no COMBLOC pilot ever had a full tank!
Wonder what the combat radius actually is. Great planes for sure, but you can't do much with 10 minutes of combat time!
http://www.globalsecurity.org/military/world/russia/il-76.htm
Il-78 MIDAS
In addition to the Candid, other versions of the aircraft include the A-50 Mainstay airborne early warning platform, and the Il-78 Midas aerial refueling tanker.
The Il-78 airplane, created on the basis of the Il-76 airplane, is designated for inflight refueling of airplanes of various purposes. The Midas is a three-point tanker probe and drogue based on (or converted from) the airframe of the Il-76MD military freighter, carrying a maximum payload of 48,000 kg. This new aerial-refueling tanker aircraft began development in teh early 1980s. When deployed, the new tanker supported tactical and strategic aircraft and significantly improved the ability of Soviet aircraft to conduct longer range operations. The former Soviet Union's only operational Il-78M regiment was based in Ukraine, which retained the aircraft after independence. Only a handful remained in Russian hands.