porkupine950The Wastes are not considered a "basic land" as far as card count goes. The Wastes cards are actual commons included in the 70 commons x 4. Their Collector numbers are 183 and 184. All this comes from Gatherer...
12 Mythics
42 Rare
60 Uncommon
70 Common
Except Gatherer lists 71 common cards and doesn't even show the second wastes picture....