Hanken, James 1975 Journal Mexico trip 10 May session in terms of species diversity. Between Gila Bend and Hassayampa to the N were found Pitvphiis melanoleucus (1), Bufo cognatus (4) Crotalus scutulatus (1), Leptotyphlops humilis (1) Colonyx variegatus (2) and Arizona elegans. Pangraptolepis getulus was found 1.7 mi W of the junction of 1 mi E of Tropcal. The Huangahala Valley Sd of Tropicah produced one Crotalus cerastes. W of Hegy in the vicinity of Tropcal we drove many of the roads crossing the agricultural area and turned up one Crotalus cerastes, one Pangraptolepis getulus, one Paryphosoma solare, two C. scutulatus, and several Bufo cognatus found calling from a flooded rice field along the road. We returned to I-10 and continued W towards a rest area just E of the Calif. border at Blythe where we spent the night. 11 May Arose at ~7 AM and continued on to Blythe, Calif for breakfast and then drove on essentially straight thru to Berkeley over the same route taken at the trip's beginning arriving at the MUT at ~7:30 PM