Nine vibration-rotational bands of various isotopic species of CO2 have been assigned in the 3657-3708 cm-1 region using a tunable diode laser spectrometer. Two of these bands, i.e. the 10011-00001 of 12C16O17 and the 11111-01101 of 12C16O18 were observed for the first time. The now accepted caleulated value of the 10011-00001 band originated from 12C16O17 is found to deviate from our observed value by 0.287 cm-1 and that of the 11111-01101 band originated frorn 12C16O18 by 0.048 cm-1.