-Michigan Colonels are appreciated at Washington, aud although none of them havo really been proiuoted, two of them have been assigned comniand of brigades - with the promotion in prospect. Col Willcox talces a brigade coraposed of the M ichigan First, Fire Zouaves, and a Pennsylvania Regiment, and a Massachusetts Regiment. - Col. Bichaudson has been assigned a brigade composed of the Michigan Second and Third, tho Massachusetts First, and New York Twolftli. Both of tbes officers graduated at West Point, botho saw servieo in Mexico, and both have won the confidence of Gen . Scott, Glad to note it.