1. C. nigricans is correct.

Key as followingt Evans.
1a, 1b, 12a, 19a ...FW ce3llspot is nearer apex than base., 19b, 19c , 21 (19d) HW cilia narrowly white or brown; FW spot 3 conjoined to band ; only outer spot in space 1b...C. nigricans.

Note this individual match key line 19a well, ie FW cellspot is nearer FW apex than base.

This is not obvious in this pix.
https://www.ifoundbutterflies.org/me...ekar_aj523.jpg