Introduction Announcement for the 6th Vienna Workshop in Astrophysics News A new version of the catalogue of variable stars in the lower instability strip by J.R. Garcia Period changes of Delta Scuti stars and stellar evolution by M. Breger and A. A. Pamyatnykh The 17th run of the Delta Scuti Network - Asteroseismology of XX Pyx: First resultsby G. Handler Delta Scuti Stars 20 CVn revisitedby E. Rodriguez et al. The 1996 and 1997 campaigns of 4 CVn: Distribution of the 34 detected frequency peaks by M. Breger A Preliminary Asteroseismic Investigation of 4 CVnby Ai-Ying ZHOU The double--mode pulsation of V798 Cygby E. Poretti IRAS Observations of Delta Scuti Starsby M.R. Templeton and T.E. Harrison Light curves and Fourier coefficients for a subsample of the MACHO Delta Scuti starsby M.R. Templeton et al. Multi-period Pulsation and Amplitude Variation Behaviour in the Delta Scuti Variable DQ Cepheiby Li Zhiping and Fang Mingjun Gamma Doradus Stars The discovery of new Gamma Doradus starsby C. Aerts and L. Eyer Low-amplitude variables in the open cluster M 34by K. Krisciunas and B. M. Patten SX Phoenicis Stars The Duplicity of the SX Phoenicis Star CY Aquariiby Ai-Ying ZHOU and Jian-Ning FU Multifrequency Modulation of the SX Phe Star BL Camby Ai-Ying ZHOU et al. Period98