Mayhew 1961 Journal 47. June 16 Dale Dry Lake, San Bernardino Co., Calif. In all, we marked & released 14 young Uma scoparia and 11 young Diposaurus dorsalis. In addition, we recaptured and re-weighted 6 young Uma scoparia & one adult Uma scoparia. The last adult Uma scoparia was seen at 1000, the last adult Diposaurus dorsalis was seen at 1030. We returned to UCR at 1335 with the following animals: Uma scoparia - 15 (683,99) Diposaurus dorsalis-13 Urosaurus graciosa-3 Crotaphytus wilizeni-1 Callisaurus draconoides-1 Sauromalus obesus-1 (juv.) We drove 287 miles on this trip. June 19 Palm Springs area, Riverside Co., Calif. Walt Moberly & I left UCR at 0510 for our monthly collecting trip to this region. We reached "Graddaddy Dune" at 0615 and began looking for lizards at 0620. At that time the air temp. (30") was 32.0°C. Several juvenil(?)Uma inornata were captured, but only one adult Uma was seen by 0730. The Larrea divaricata looks very bad at this location, there are few rodent burrows remaining beneath the plants, and almost no tracks of adult lizards. Therefore, we felt we might catch more animals in another location.