R.K.Salander, 1952 50 August 24 Pie de la Cuesta, 20ft., Guerrero, Mexico. Platysaris aglaiae {ad. taken in thick mangroves}, (specimen noted up as a skeleton) Philortyx fasciatus (one taken from flock of nine), Sporophila minuta (one taken, others seen in thorn- scrub). In addition, I noted one large spiroe of Myiarchus in the mangroves. Also a swallow - (Petrochelidon?) nb. flying over mangroves. Noted small black birds in thorn scrub = Volatimia jacobina? Took a small snake and a large (-OK. Aug. 26) lizard in the mangroves. Several (4-5) sandpipers seen. Returned to hungalow at 1:00. Have slight sinus trouble today; rather sick. August 25 Writing field notes in the morning. At 1:00, left for trips to Montosa Island in small outboard motor boat. Island is located in the laguna about 10 mile (one hour ride on boat) from the eastern most edge (= near our bungalow.) It is about 300 yards from shore. Island itself is roughly 500 x 200 yds. Rather hilly. A Mexican family lives there. Fisherman fishing nearby at the mouth of a river stop there for the night. Rather heavily vegetated with a variety of trees (no mangroves) and herbaceous plants. Many large boulders on one end near the water. Another smaller island lies to the north-east of this larger island (about a mile from it). Counted eight trees (low, dense) on this island. The owner of the boat remarked that birds (pelicans) roost on these islands at night, coming to them at about 6:00PM.