. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. SlBYNOMORPHUS (COLUBRIDAE) IN PERU AND ECUADOR • Cddle 231. Figure 27. Sibynomorphus petersi. Dorsal and ventral views of BMNH (San Pablo, Cajamarca Department, Peru). Female, 595 mm SVL marca Department by Perry O. Simons on 5 November 1899 (the date comes from Simons' itinerary published by Chubb, 1919; see Cadle, 1998: footnote 6). Si- mons' South American herpetological col- lections were described by Boulenger (1899, 1900, 1901, 1902a,b), but he men- tions no snakes other than Philodryas si-
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. SlBYNOMORPHUS (COLUBRIDAE) IN PERU AND ECUADOR • Cddle 231. Figure 27. Sibynomorphus petersi. Dorsal and ventral views of BMNH (San Pablo, Cajamarca Department, Peru). Female, 595 mm SVL marca Department by Perry O. Simons on 5 November 1899 (the date comes from Simons' itinerary published by Chubb, 1919; see Cadle, 1998: footnote 6). Si- mons' South American herpetological col- lections were described by Boulenger (1899, 1900, 1901, 1902a,b), but he men- tions no snakes other than Philodryas si- monsii, Homalocranium marcapatae ( = Oxyrhopus marcapatae), and two species of Elaps: E. simonsii (— Micrurus pyrrho- cryptus) and E. regularis (= M. annella- tus). I visited San Pablo and vicinity 16— 17 August 1994, and my field notes indi- cate that "all natural habitat in the broader area has been destroyed—now only agri- cultural land, secondary forest, and some brushy vegetation along fence rows . . few streams. . Vegetation included much Eucalyptus and Opuntia as well as culti- vated agaves. Terrain [was] very steep and at this time very ; Two females from southern Ecuador (BMNH , 550 mm SVL, 720 mm total length; BMNH , 541 mm SVL, 711 mm total length), dates of collection unknown, each contained five large eggs (determined by palpation). The smallest specimen examined (USNM 237040, 184 mm SVL) still has an unfused umbilical scar and was collected 2 August 1954. The region of southern Ecuador and northern Peru from which Sibynomorphus petersi is known has a complex topography and, consequently, a diversity of environ- ments, including relatively arid inter-An- dean valleys (, Rio Catamayo) and hu- mid forests on the Andean slopes (Chap- man, 1926). Few specific data are available for the ecological distribution of S. petersi within this region, although some localities (, the Rio Catamayo valley of southern Ecuador
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