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We report photometric detections of orbital and superorbital signals, andnegative orbital sidebands, in the light curves of the nova-like cataclysmicvariables AQ Mensae and IM Eridani. The frequencies of the orbital,superorbital, and sideband signals are 7.0686 (3), 0.263 (3), and 7.332 (3)cycles per day (c/d) in AQ Mensae, and 6.870 (1), 0.354 (7), and 7.226 (1) c/din IM Eridani. We also find a spectroscopic orbital frequency in IM Eridani of6.86649 (2) c/d. These observations can be reproduced by invoking an accretiondisc that is tilted with respect to the orbital plane. This model works wellfor X-ray binaries, in which irradiation by a primary neutron star can accountfor the disc's tilt. A likely tilt mechanism has yet to be identified in CVs,yet the growing collection of observational evidence indicates that thephenomenon of tilt is indeed at work in this class of object. The resultspresented in this paper bring the number of CVs known to display signalsassociated with retrograde disc precession to twelve.  We also find AQ Mensae to be an eclipsing system. The eclipse depths arehighly variable, which suggests that the eclipses are grazing. This findingraises the possibility of probing variations in disc tilt by studyingsystematic variations in the eclipse profile.

Orbital, Superhump, and Superorbital Periods in the Cataclysmic Variables AQ Mensae and IM Eridani