griffin: ophidia from south America in carnegie museum 193 



mouth. The bands across the head are separated by very narrow light Hnes. The 

 chevron-shaped band of the nape is broad and almost joins the parietal bands. 

 The remainder of the upper surface of the body is crossed by similar brown, black- 

 edged, chevron-shaped bands, which almost reach the gastrosteges and are separated 

 by slightly narrower light bars. A small dark spot lies in the center of each light 

 bar between the ventral ends of the dark bands. There are a few faint dark spots 

 on the light ventral surface. The total number of dark bands, including the nuchal 

 and tail bands, is twenty-six. 



Counts and Measubbmbnts. 



Anal 1/1 



Scale-rows 19 



Gastrosteges 142 



Urosteges 31/31 



Upper labials 7(3.4) 



Preoculars 1 



Postoculars 2 



Temporals 1, 2 



Total length in mm 176 



Length of tail in mm 21 



42. Lystrophis semicinctus (Dumeril & Bibron). 

 Heterodon semicinctus Dumeril & Bibron, Erp. Gen., VII, 1854, p. 774. 

 Lystrophis semicinctus Boulenger, Cat. Snakes, II, 1894, p. 153. 



There are fifteen specimens of this species in the collection, all taken by Jose 

 Steinbach in the Province del Sara, Bolivia. It is worthy of note that in the case 

 of the specimen bearing the catalog number 85 both loreals enter the orbit below 

 the preocular. The list of species is as follows: 



No. 12, 9 , Provincia del Sara, J. Steinbach coll., Feb., 1911. 



No. 14, c?, Provincia del Sara, J. Steinbach coll., Feb., 1911. 



No. 15, cT, Provincia del Sara, J. Steinbach coll., Feb., 1911. 



No. 31, 9 , Provincia del Sara, J. Steinbach coll., Feb., 1913. 



No. 33, cT , Provincia del Sara, J. Steinbach coll., Sept., 1913. 



No. 36, 9 , Provincia del Sara, J. Steinbach coll., Sept., 1913. 



No. 39, cf , Provincia del Sara, J. Steinbach coll., Sept., 1913. 



No. 51, cT, Provincia del Sara, J. Steinbach coll., Jan., 1913. 



No. 84, cf , Santa Cruz de la Sierra, Jose Steinbach coll. 



No. 85, cf, Santa Cruz de la Sierra, Jose Steinbach coll. 



No. 86, cf, Santa Cruz de la Sierra, Jose Steinbach coll. 



No. 87, 9 , Santa Cruz de la Sierra, Jose Steinbach coll. 



