Cerura modesta, n. sp.

Male.—Front and vertex nearly white. Collar a little darker, tinged with a faint creamy yellowish-brown. Thorax dark stee-blue, almost black, with metallic purplish reflections, the orange scales forming so marked a feature in other species either entirely absent of with but a faint trace of their presence. Patagia concolorous with thorax, edged outwardly with white. Abdomen black above, or nearly so, the segments bordered behind with pale cinereous, thickly clothed with long fine white hairs, whitish beneath.