"This belongs to one of the absolutely most difficult pairs to separate of all the species I studied: females of Parelaphidion aspersum versus P. incertum. In this case, since the antennae are not straight back, it's not much better than a 50:50 guess. The scape and 4th segment are roughly equal, so that's not much help. About the only thing here that might be definitive is that she does appear to be in fairly pristine condition. As such, the reduced degree of elytral mottling would not be attributable to wear; and unworn specimens of aspersum have visibly less pale spotting than unworn specimens of incertum. It was not something I put much faith in for general use, since it was only true of unworn specimens, but in this case it would tilt the scale in favor of this being aspersum."

for all the effort and expertise.