Lewis & Short

arviga (harv-), v. arvix.

arvix or harvix, ĭgis, f., = ΑΡΙΞ, with digamma ΑΡϜΙΞ, also as fem. arvi-ga (harv-), ae, a ram for offering: Aries qui etiam dicebatur Ares, veteres nostri Arviga, hinc Arvigas, Varr. L. L. 5, § 98 Lindem.: Harviga dicebatur hostia, cujus adhaerentia inspiciebantur exta, Paul. ex Fest. p. 100 Müll. (in Don. ad Ter. Phorm. 4, 4, 28, haruga; in Vel. Long. p. 2233 P. ariuga).