along its outer border. The elevated head position is necessary to permit free movement of the dewlap. We attempted to make the lizards take to the air by pounding on the tree trunks but this technique failed. On two occasions throwing rocks at them cause them to take flight and the approach of a native boy up the tree trunk also caused flights. Once one was seen to spread its wings out flat against the tree trunk but it retracted them without taking flight. Flights here were nearly in a straight line from one tree trunk to another. On one occasion the route was through the fronds of a low-growing palm and I thought for a moment the lizard was going to land in the palm canopy but it continued on through, missing a frond by inches to alight on a trunk. Most flights were 15-20 ft. in length but one was over 30 ft. The wings were stationary throughout and the hind legs were held about as shown in the sketch. The curve of the wing presents an airfoil section. The flight was quick, yet slow enough so that one had a clear image throughout. Only once did a lizard bank slightly but Wells said in dense forest, sharp banking turns occur. He also said the time to collect is on bright days in the morning and during the breeding season when the lizards chase each other up and down the tree trunks. The sudden exposure & disappearance of the blackish & browned wings creates a definite flash-color effect. I took movie shots of the lizards on the trunks 20 ft 25ft. a sample glide 30 ft.