Nirmus faralloni Kellogg, 1896a: 103, pl. 5, fig. 4.
Baja California: Arenaria melanocephala and Larus heermanni, San Gerónimo Island, 1897, R.C. McGregor (Kellogg & Mann 1912); Haematopus palliatus frazari, San Martin Island, 1897, R.C. McGregor (Kellogg & Mann 1912).
Note: Specimens of P. farallonii were identified by Kellogg & Mann (1912) as “ Lipeurus faralloni ” and “ Nirmus faralloni ”. All three host records in Kellogg & Mann (1912) are most likely the result of contaminations, because no species of the host genera given by these authors are regular and natural hosts for any species of Pectinopygus (see Price et al. 2003).