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We report the discovery of a new eclipsing polar, CRTS J035010.7+323230(hereafter CRTS J0350+3232). We identified this cataclysmic variable (CV)candidate as a possible polar from its multi-year Catalina Real-Time TransientSurvey (CRTS) optical light curve. Photometric monitoring of 22 eclipses in2015 and 2017 was performed with the 2.1-m Otto Struve Telescope at McDonaldObservatory. We derive an unambiguous high-precision ephemeris. Strong evidencethat CRTS J0350+3232 is a polar comes from optical spectroscopy obtained over acomplete orbital cycle using the Apache Point Observatory 3.5-m telescope. Highvelocity Balmer and He II $\lambda$4686{\AA} emission line equivalent widthratios, structures, and variations are typical of polars and are modulated atthe same period, 2.37-hrs (142.3-min), as the eclipse to within uncertainties.The spectral energy distribution and luminosity is found to be comparable tothat of AM Herculis. Pre-eclipse dips in the light curve show evidence forstream accretion. We derive the following tentative binary and stellarparameters assuming a helium composition white dwarf and a companion mass of0.2 M$_{\odot}$: inclination i = 74.68$^{o}$ ${\pm}$ 0.03$^{o}$, semi-majoraxis a = 0.942 ${\pm}$ 0.024 R$_{\odot}$, and masses and radii of the whitedwarf and companion respectively: M$_{1}$ = 0.948 $^{+0.006}_{-0.012}$M$_{\odot}$, R$_{1}$ = 0.00830 $^{+0.00012}_{-0.00006}$ R$_{\odot}$, R$_{2}$ =0.249 ${\pm}$ 0.002 R$_{\odot}$. As a relatively bright (V $\sim$ 17-19 mag),eclipsing, period-gap polar, CRTS J0350+3232 will remain an importantlaboratory for the study of accretion and angular momentum evolution in polars.

CRTS J035010.7+323230, a new eclipsing polar in the cataclysmic variable period gap