Arctophylax, pen. corr. arctophylâcis. pen prod. m. g. Stella que & Arcturus, hoc est Cauda vrse siue Bootes dicitur. Cic.
Lewis and Short: Latin dictionary
Arctŏphlax, ăcis, m., = *)arktofu/lac, the Bear-keeper, a constellation, usu. called Bootes, Cic. Arat. Phaen. 394 B. and K.; id. N. D. 2, 42, 109 (as transl. from Arat. 92); so Luc. 8, 180.