Mayhew 1961 Journal 39. June 4 Northern Sonora, Mexico Everything went fine until Walt killed the engine. Then the starter wouldn't budge. We tried to rock it loose without success. Finally, after much digging, pushing, & crossing, we jacked up the right rear wheel & spun it to act like a crank. The motor started & we lost no time getting back onto the pavement. We stopped by some sand next to the road & caught 5 Uma notata about sundown. After sundown we night collected the road back to San Luis (77 miles). We began looking for animals at 1930 and looked until 2345. We caught 8 Colonyx variegatus and 1 Trimorphodon lambda. We also saw 4 Crotalus cerastes & 1 Crotalus scutulatus (DOR). We crossed the border into Arizona at San Luis, then camped about 10 miles east of Yuma. We drove 288 miles today. June 5 Southwestern Arizona We drove east from our campsite on Highway 80 until we reached the Gila Mts. We stopped to look for lizards along the road. We were able to capture 3 Sauromalus obesus, 2 Crotaphytus collaris & 1 Uta stansburiana (all the animals we