REDISCOVERY OF HYLA PICTIPES COPE, WITH DESCRIPTION OF A NEW MONTANE STREAM HYLA FROM COSTA RICA Priscilla Starrett Department of Biological Sciences University of Southern California Los Angeles, California 90007 In 1957 during my first field work in Costa Rica. I collected two dis-tinctive species of stream-breeding hylids, from the Cordillera Cen-tral, that did not agree with any of the specimens available to Taylor (1952. 1954, 1958) for his review. In subsequent years, workers from the University of Southern California and I accumulated addi-tional material of these forms from the Costa Rican ranges. One species appears to represent Hy/a pictipes Cope, originally described in 1875 and not rediscovered since. The second form proves to be an undescribed species related to H. pictipes. The series referred to Hyla pictipes is from the slopes of the vol-cans: Poas, Barba. Irazu and Turrialba in the Cordillera Central and from the north and south slopes of the Cerro de la Muerte, Cordillera de Talainanca. All specimens were taken in the immediate vicinity of torrential streams at aUiliides between 6500 to 8200 feet (1980 to 2500 meters) . In life there was marked color variation in these frogs. Some w^ere deep black in dorsal ground color, others dull green and a few chocolate brown. The color differences are not geographically constant nor do they correlate with differences in structural charac-ters. On Volcan Poas and Volcan Barba two or more color variants were collected together. A number of specimens kept alive did not exhibit any ability to change individual ground color under different circumstances. Ilyla pictipes Cope, 1875 Figures 1 . 2 and 3A Hyla punctario/a pictipes Cope. 1875: (Costa Rica: Provincia de Limon: Pico Blanco, in error for Cerro Utyum, 5000-7000 feet) . Hyla punctariola nioesta Cope. 1875. Hyla punctariola nionticola Cope. 1875. Diagnosis: Distinguished from other montane stream hylas by the following coml)ination of characters: Small tympanum with heavy fold over it; dark groin with yellow spots; fingers Y4 webbed, toes 5/6 webbed; a series of white tubercles on forearm and foot. It is easily separated from its close relatives H. rivularis and H. debilis in 17
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