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We present and discuss the pulsational characteristics of the Delta Scutistar 38 Eri from photometric data obtained at two widely spaced epochs, partlyfrom the ground (1998) and partly from space (MOST, 2011). We found 18frequencies resolving the discrepancy among the previously publishedfrequencies. Some of the frequencies appeared with different relativeamplitudes at two epochs, however, we carried out investigation for amplitudevariability for only the MOST data. Amplitude variability was found for one ofthree frequencies that satisfy the necessary frequency criteria forlinear-combination or resonant-mode coupling. Checking the criteria of beatingand resonant-mode coupling we excluded them as possible reason for amplitudevariability. The two recently developed methods of rotational-splitting andsequence-search were applied to find regular spacings based only onfrequencies. Doublets or incomplete multiplets with l=1, 2 and 3 were found inthe rotational splitting search. In the sequence search method we identifiedfour sequences. The averaged spacing, probably a combination of the largeseparation and the rotational frequency, is 1.724+/-0.092 d-1. Using thespacing and the scaling relation $\bar\rho = [0.0394, 0.0554]$ gcm$^{-3}$ wasderived. The shift of the sequences proved to be the integer multiple of therotational splitting spacing. Using the precise MOST frequencies andmulti-colour photometry in a hybrid way, we identified four modes with l=1, twomodes with l=2, two modes with l=3, and two modes as l=0 radial modes.

The Delta Scuti star 38 Eri from the ground and from space