Griffin: South American Lizards. 311 



limb is a narrow, white, vertical bar, narrowly and irregularly margined 

 with brown, which turns at the shoulder to run about half way down 

 the front of the upper arm. The tail is quite regularly barred by 

 more or less distinct alternate rings of light and dark brown. The 

 upper surface of the hind limb is crossed by broad dark bars, which 

 extend to the foot, and are especially distinct on the tibia. 



Genus Polychrus Cuvier. 

 14. Polychrus acutirostris Spix. 



Polychrus acutirostris Spix, Spec. Nov. Lacert., 1825, p. 15, PI. XIV, A. 

 Polychrus acutirostris Boulenger, Cat. Lizards, II, 1885, p. 99. 



The collection includes fifteen specimens of this species. Numbers 

 965, 968, 971, 972, 975, 977, 978, 979, 982, 983, 984, and 987 were 

 collected by Steinbach in the Provincia del Sara, Bolivia. The others 

 are recorded as follows: 



C. M. No. 954, Puerto Suarez, Bolivia. Steinbach coll. 

 C. M. No. 959, Corumba, Matto Grosso, Brazil. Haseman coll. 

 C. M. No. 960. Asumpcion, Bolivia. Haseman coll. 



All except No. 954 are females. 



Genus Stenocercus Dumeril & Bibron. 

 15. Stenocercus roseiventris Dumeril & Bibron. 



Stenocercus roseiventris Dumeril & Bibron, Erp. Gen., IV, p. 350. 

 Stenocercus roseiventris Boulenger, Cat. Lizards, II, 1885, p. 133. 



There are two specimens in the collection, C. M. Nos. 973 and 974, 

 captured by Steinbach in the Provincia del Sara, Bolivia, at an altitude 

 of 350 meters. The scales of the sides of the body are keeled, the 

 keels diminishing toward the ventral surface, so that there is on the 

 sides a gradual transition from the keeled to the smooth condition. 

 The antehumeral fold is dark, the tail barred with alternate light and 

 dark rings. Pterygoid teeth are lacking. These variations from the 

 typical characters of the species do not seem to me sufificient to justify 

 separating these specimens from S. roseiventris. 



Genus Tropidurus Wied. 

 16. Tropidurus spinulosus (Cope). 



Microlophus spinulosus Cope, Proc. Philad. Acad. Sci., 1862, p. 351. 

 Tropidurus spinulosus Boulenger, Cat. Lizards, II, 1885, p. 175. 



We have a single male specimen, C. M. No. 955, collected by Stein- 

 bach at Puerto Suarez, Bolivia. 



