104 U.S. NATIONAL MUSEUM BULLETIN 288 



amphibians, such as the Spanish newt, Pleurodeles waltl. As some toads 

 have distinctly "knobby" vertebrae — Bujo alvarius and B. valliceps, 

 to name only two — it is perhaps not surprising that an overgrowth 

 on the back also should take place in a species where abnormal growth 

 is already evident in the postorbital crests. 



Since this species, over its extremely wide range, is extremely 

 variable in the bony development of its head crests and vertebral 

 knobs, it is another of the forms requiring comparison of many 

 specimens from Central and South America before a discussion of 

 some proposed subspecies becomes practicable. For this reason the 

 status of Bujo alatus Thominot, 1884, B. chanchanensis Fowler, 

 1913, and B. roqueanus Melin, 1941, is not considered here. 



Specimens Examined 



COLOMBIA 



Amazonas: Gino-Goj6, lower Rfo Apaporis, USNM 144621-5; Leticia, UF 

 10017; Puerto Narifio, USNM 146823-30; Rio Apaporis, USNM 144626- 

 33; 144931-2 (juv.) 150154-6; Sorotama, upper Rio Apaporis, USNM 

 144634-6. 



Antioquia: Medellin, CNHM 63843-4; Puri, CNHM 63842; Uraba, Villa 

 Arteaga CNHM 63841. 



BolIvar: Cienaga de la Raya, USNM 145776; Murucucu, Sinu River side, 

 500 m., CNHM 61695; probably upper Rio Sinu, CNHM 61680; Regenera- 

 ci6n, USNM 127856-62. 



Caqueta: Aserrio, MLS 51, 248; Rfo Orteguaza, Villa Maria, USNM 146812- 

 3 (juv.). 



Cauca: Near Moscopan, USNM 14624-31; Gorgona Island, USNM 145107- 

 23. 



Choc6: Andagoya, USNM 144638-42, 150157-63; Cano Sando, tributary 

 of Rfo Pep<§, lower Rfo Baud6, USNM 144643-4; "Darien," USNM 4337- 

 -8(?); Rfo San Juan, 10-15 mi. west of Playa de Oro, USNM 147142-7, 

 150623-5, tributary of Rfo Opogodo, near Quebrada Santa Anna, USNM 

 124266; upper Rfo Pepe, tributary of Rfo Baud6, USNM 144645-6. 



C6hdoba: Alto de Quimarf, CNHM 61757-63, 61766. 



Cundinamarca: Beltran, between Girardot and Puerto Boyaca, upper Rfo 

 Magdalena, 350 m., USNM 147253; Fusagasuga, USNM 144650, 146200; 

 La Mesa, USNM 144651-2; San Francisco, USNM 144647-9. 



Meta: Buenavista, USNM 144661-3; Guaicaramo, USNM 146821-2 (fe- 

 male with eggs) ; La Macarena, Camp "Las Ranas," USNM 144657, Las 

 Mesetas, Camp "Las Ranas," USNM 144658; Macarena, Camp No. 1, 

 USNM 144656; mouth of Cano Losada, USNM 144653-5; Rfo Renjifo, 

 1,500 m., CNHM 81343-8; Serranfa de La Macarena, Rfo Guapaya, 330 m., 

 CNHM 81339-42; upper Rfo Giiejar, Camp "La Macarena," USNM 

 144659-60; Villavicencio, USNM 144664-6. 



Nari5jo: Imbilf Rfo Mira, USNM 147399-400; La Guayacana, 250 m., 

 CNHM 61691-4, 61777; Rio Mataja, USNM 147276-316. 



Putumayo: San Antonio, above Puerto Asfs on the upper Guamues, tributary 

 of the upper Putumayo, USNM 144667; Umbrfa, 400 m., CNHM 61696- 

 8, 61721-30; Urcusique, USNM 144673. 



