We present RXTE observations of two recently identified massive X-ray binaries .
RX J0440.9+4431/BSD 24–491 and RX J1037.5–564/LS 1698 are confirmed as accreting Be/X-ray systems following the discovery of X-ray pulsations , with barycentric pulse periods of 202.5 \pm 0.5 s and 860 \pm 2 s respectively .
The X-ray spectral analysis shows that the energy spectra of the pulsars can be represented by a power-law , modified at low energy by an absorption component and at high energy by a cut-off .
Very weak Fe lines may be present .
Both sources appear to display a low cut-off energy when compared to typical X-ray pulsars , low X-ray variability ( factor of \leq 10 ) , and no dependence of the X-ray spectrum with energy .
Given the similarity of these X-ray properties with those of the other persistent BeXRB pulsars , 4U0352+309/X Per and RX J0146.9+6121/LS I +61 235 , we suggest that RX J0440.9+4431/BSD 24–491 and RX J1037.5–564/LS 1698 are also members of this subclass .