1) Pacarina puella
usually has more pronounced pattern in the wings
US Range: AZ, NM, CO, TX, OK, & LA
Host association is usually MESQUITE.
Pacarina puella Davis, Kondratieff et al., 2002: 7, 13, 28.

2) Pacarina shoemakeri
usually has less infuscation (i.e. less dark pattern in the wings)
US Range: AZ, NM, CO, and w. TX
Host association is usually JUNIPERS.
Pacarina puella Davis (juniper variety), Sanborn and Phillips, 1995: 481.
Pacarina shoemakeri Sanborn and Heath, Sanborn et al., 2011a: 152, 153.
NOTE: The pronotum in these images seem to exhibit the centralized "hourglass-shaped" dark region described in shoemakeri.

This is a tropical genus with just one species north of subtropical Texas - the part around Brownsville has another species as well - so it is a bit of an "odd-ball" for the North American fauna. Its small size and very wide head are distinctive.