Journal Hafner, M.S. 1977 1 July 1.9 mi. (by road) E la Joyita, 210 m, Sonora, México. 0515 J.C. Hafner and I departed Richmond, California headed for a 2 month collecting trip in Mexico. Drove south on Hwy 5 to Los Angeles then east on I-10. Turned south at Indio and at 1600 arrived at Calexico. Bought Insurance (for Mexico) for 45 days at a total cost of $145.00. Crossed the border with little incident and drove east on Mexico Hwy 2, through San Luis Rio Colorado to the above locality in Sonora. Very hot day -- moderate wind from the SE. As we headed east out of San Luis we encountered more and more Sahuaro cacti. The "town" of la Joyita is very small and located some 44 mi. E of San Luis. We set out 100 traps in each of the following localities: 6.3 mi. (by road) W la Joyita, 180 m, Sonora, México. 1.9 mi. (by road) E la Joyita, 210 m, Sonora, México. The vegetation at the 1st locality was principally Larrea with Cholla and some few Sahuaro cacti. We set traps in the gravelly sand to the north of the Hwy just as the Hwy began to enter the Penecate Mtns. The 2nd locality (where we camped) was