Koford, Rolf R 1974 Journal 10 Dec. 20mi E, 1 mi S Tecate, Baja California del Norte, Mexico ~1000 m. We talked with Bill Glanz at the IBP Project House in San Diego and arranged to meet him at La Salina. He and Dave Bradford are supposed to pick up Dave Krohn and meet us at La Salina on the afternoon of 11 Dec. We left the IBP house soon after 0900 and got tourist cards at the Mexican consulate (1007 5th st.) with only about a 20 min. wait. We were also able to get Mexican insurance on the same floor. After some last minute shopping in San Diego, we went southeast along Hwy 94, getting gas outside of town and having our antifreeze checked at a Texaco station (gas was 56¢/gal.). We crossed the border at Tecate having to go in and get our tourist cards stamped. We then tried to find a Microtus collecting locality which C. Lamb had found in 1927. We turned north onto a fair-sized dirt road heading north off the highway going east from Tecate at a point about 16 miles east of Tecate. A couple miles north of the highway we came to an old streambed, lined with live oaks (Q agrifolia probably) and a couple willows. We figured that that streambed was Lamb's locality. The whole surrounding area was flat or gently rolling low hills covered with several species of brush (chenise, manzanita, a light-red-barked bush with long scaly leaves). We looked around the area, especially in amongst bushes with grass growing under them. The grass was sparse, but some seemed cut. We also found several willow twigs