18 are of the form: “she promised her supporters (read: voters)”
5 are of the form: “she promised her supporters (read voters)”
10 are unrelated to your question, like “(read more in…)”
These shows two things: there are two alternatives, and while the use of a colon after reading is preferred, it is not a hard and fast rule. Also, when the colon is omitted, italicisation may be used for clarification of the intent, as in: “she promised her supporters (read voters)”; unfortunately, this is not reflected in the statistics given above.
Personally, I prefer using the colon, as I find it more readable.
The example on Wiktionary uses brackets (http://en.wiktionary.org/wiki/i.e), and the at Answers.com all the examples show i.e. used in parenthetical expressions of some sort (bracket, comma or em-dash) (http://wiki.answers.com/Q/When_to_use_ie_in_a_sentence). So I would suggest it is probably a good idea, particularly if there is some doubt as to where the restatement ends and the rest of the sentence begins.
Best Answer
Looking for occurrences of
(read
in the Corpus of Contemporary American English, I find among the 33 first hits:These shows two things: there are two alternatives, and while the use of a colon after reading is preferred, it is not a hard and fast rule. Also, when the colon is omitted, italicisation may be used for clarification of the intent, as in: “she promised her supporters (read voters)”; unfortunately, this is not reflected in the statistics given above.
Personally, I prefer using the colon, as I find it more readable.