457. Tompson Big Bend Rio Grande April 7-8, 1934 28. Pyrrhuloxia (sp?) common along Rio Grande. 29. White-rumped shrike (Lanius ludovicianus migraans) excutorides )common. 30. junco?, English sparrow, sparrows; There were many birds which I could not identify by song and did not see sufficiently for good diagnostic characteristics. Two turtles were seen swimming in the river. They may have been the Sonoran Mud Turtle (Kinosternon sonoriense.) A large bullsnake (Pituophis sp.) was found along the river. He threw it into the water and it could swim about 3 times as fast as it can crawl. It was brightly colored as though it had recently shed. Characteristic vegetation of the region: 1. Bulbilis dactiloides, Buffalo grass, in a few spring areas between Alpine & the Big Bend, but none seen in Big Bend area. 2. Sparse scattering of grass, some grama, in area staples) but most has been grazed to death. 3. Agave lechuguilla very abundant throughout the region, but thickest in foothills. 4. A. wislizeni in foothills & Chisos. 5. Agave lep. A third one with reddish edges (both the leaves; very slender leaves, about as tall as lechuguilla. Steiger did not know the name + she had no way of identification.