224 



MEMOIRS OF THE CARNEGIE MUSEUM 



Our Colombian series of L. lansbergi compels a modification of the formula of 

 the species to include a wider variability, as follows: 



Scales in 23-27 rows; anal single; gastrosteges 147-159; urosteges 28-36, as 

 shown by the accompanj'ing table. 



Counts and Measukembnts. 



'■ Mutilated. 



85. Lachesis mutus (Linnaeus). 



Crotalus mutus Linn^us, Syst. Nat., Ed. XII, 1766, I, p. 373. 

 Lachesis mutus Boulenger, Cat. Snakes, III, 1896, p. 533. 



We have but one specimen representing this species in the collection (C. M. 

 No. 125). It consists only of the head and tail of a very large individual, collected 

 by Jose Steinbach at Santa Cruz do la Sierra, Bolivia. 



86. Lachesis neuwiedi (Wagler). 

 Bothrops neuwiedi Wagler, in Spix, Serp. Bras., 1824, p. 56, PL XXII, fig. 1. 

 Lachesis neuwiedi Boulenger, Cat. Snakes, III, 1896, p. 542. 



The specimens in the collection are listed as follows : 



No. 1, cf , Province del Sara, Bolivia, J. Steinbach coll., Sept., 1911. 

 No. 4, 9 , Province del Sara, Bolivia, J. Steinbach coll., Jan., 1912. 

 No. 34, cf , Province del Sara, Bolivia, J. Steinbach coll., Sept., 1913. 

 No. 35, cf , Province del Sara, Bolivia, J. Steinbach coll., Sept., 1913. 



