Journal Hahner, M.S. 1979 4 July (cont) 1 km N Sigueros 50m., Sinaloa, México. I saw several large jack-rabbits (lepus) and 2 roadrunners (Geococix sp?). We worked the traps all day and decided we should karyotype the live gopher John caught yesterday, so we drove into Mazatlán and checked into the Hotel California. 1300 finished karyotyping and preparing animals. Ate dinner on the main-drag (Playa) and 2430 retired. Nice evening. 5 July 1 km N Sigueros 50m., Sinaloa, México. 0615 arose and drove back to the trap site. We had left the traps overnight - caught 2 Thomomys ... John's was damaged by ants. We worked the traps all morning and captured 2 more gophers, 1 live. 1200 pulled traps. The heat was extreme. I doubt that we could work much longer today. We had 12 specimens from this locality and we couldn't find any more active systems. We headed back into Mazatlán to karyotype the live gopher. 1400 checked into Hotel Mazatlán and the north Playa. Slept from 1430 to 1630. 1700 ate dinner. Later, we karytyped and prepared specimens.