I assume these are male Phaeoura's, but the question arrises as to whether the common eastern species P. quernaria should be expected in the mountains of West Texas and how to distinguish that from the (expected) Q. cristifera.
P. quernaria - http://mothphotographersgroup.msstate.edu/species.php?hodges=6763
P. cristifera - http://mothphotographersgroup.msstate.edu/species.php?hodges=6764