Cantel Monte Cristo Mine, 700', dep't Morazan, El Salvador. Dec. 17, 1941. Found a large colony of these lizards in a dense patch of Typha (cattail) bordering a stream near camp. These lizards occur in three sizes, one about 2 1/2" long, one about 8" long, and the fully adults which are about 30" long. Their hind legs are very much longer than their front legs, and when they run they use their hind legs nearly exclusively, with the head and forelimbs held high -- J.T. They are extremely rapid, and extremely wary. They stay on the stream bank, & when approached, run on their hind-legs along submerged cattails so that it resembles walking on water. They then leap 6" or a foot through the air and disappear into the tules, where they can be heard rustling the dry reeds. I obtained 1 specimen (913) and them only after a long wait, when it crawled out on a reed. I have often seen small lizards of this species on the banks of a small stream, Quebrada Honda, 1/4 mi. ENE of camp. 3 mi. W Monte Cristo Mine, 650', dep't Morazan, El Salvador Dec. 17, 1941. Sturton and I obtained 2 large adults from a bank of the Rio San Miguel. They were in the shrubs at the water's edge. Several others escaped by running over small stones in the shallow water and plunging into the shrubs farther up the banks.