Journal Hafner, H.S. 1977. 32.4 mi. (by road) N El Chinero, ca. 10 m., Baja California, México. 3 July (cont) P. arenarius. Since it is still cool in the Am, we elected to drive to the mountains before preparing the specimens. We headed S on Hwy 5 and reached El Chinero about 0800. We filled-up on gas - (the old-fashioned type of pump) pesos/liter, then drove west on the dirt road from El Chinero to Valle de la Trinidad. About half way to Valle de la Trinidad the road was being paved so we were able to have a smooth 2nd half of our journey. We ascended over San Matias Pass (about 3200 ft. elev.) around 1000 hours and passed the tiny village of San Matias. We stopped at a point 11.6 mi. (by road) E of Valle de la Trinidad, on the main road. There were numerous gophers on the road-cut and we began to trap (after we finished preparing this morning's catch). We each set out approx. 12 gopher sets and the animal slowly began to trickle in. There was a slight overcast now, making the hot day bearable. The gophers were apparently also active at this time (1400). 1700 the trapping success began to slow down so we left the traps ad and drove into Valle