Hankou, James 1975 Journal Mexico trip best area along I-35, ~15 mi. N Laredo, Texas 26 April Hwy 90 in Del Rio where we collected one Cnemidophorus gularis. After buying supplies and lunch in Del Rio we headed S on Hwy 90 towards Laredo. We stopped along Sycamore Cr. at the S edge of Val Verde Co to search the broad, calcareous rocky creek bed and adjacent brush & scrubby vegetation. Cnemidophorus sp., Sceloporus sp. and Cophosaurus (Halbrookia) texana were found but none were collected. Allen Greer did collect one Thamnophis proximus beneath a rock adjacent to a small stream feeding the creek. Continuing S on Hwy 90 into late afternoon several live + DDR Phrynosoma cornutum were found on or alongside the road, as were DDR Crotalus atrox, T. proximus, & Mastigodryis foeniatius. In the evening a live C. atrop was seen and accidentally hit by car on Hwy Int 35 ~20 mi. N of Laredo. This latter snake, the live Phrynosoma, and any salvageable DDR specimens were collected.