Hanken, James 1975 Journal Mexico Trip A.D. Thomas Truck Stop + Cafe, Del Rio, Val Verde Co, Texas 26 Apr pretty steadily little stops for keeps, but along rte 90 we stopped for any wild animals on the road. At Fabens, Texas we spotted one Callisaurus draconoides at the Highway entrance but were unable to catch it. One Masticophis flagellum was found DOR on Rte. 90 S of Van Horn. Crotalus atrox were found DOR 26.6 N of Sanderson and 11.6 mi. S of Dryden on Jury 90. One Masticophis taeniatus was found DOR 4.0 mi. S of Sanderson. One Elaphe guttata was found 0.6 mi. N of Cedar Sta. It was taken alive and catalogued by me. 26 Apr. Red area along I-35, ~15 mi N Laredo, Texas Sam Sweet + el entered Four-Mile Cave & located ~1/2 mi. N of Del Rio on Jury 90. We found one Eurycea sp nov in a pool at the bottom of the cave. The species is fully neotenic type of the SSS type III. At the bottom of the first cave drop, still within the lighted zone, Sam found a Synophis magnocki. While we were in the cave the Greek's found two Sonora episcopae. After caving we bathed in San Felipe Springs Creek along