13 



tail they fuse into a lateral stripe. No dorsal stripes. Lips and 

 inferior surfaces unspotted. 



Three specimens, No. 47, These are young, and I describe 

 them to indicate their color difference from the typical L. albi- 

 ventriSj with which they agree in scutal characters. The L. alti- 

 colis Cope (Ophromorphus) is regarded by Boulenger as 

 identical with the L. albiventris. Of the propriety of this I have 

 some doubt, as the muzzle is more elongate in the former, the 

 internasal plates being very nearly as long as broad. The gas- 

 trosteges are more numerous than the highest given by Bou- 

 lenger. They are 161; urosteges, 64; the number in the L. al- 

 biventris ranges, according to Boulenger, from 138 to 158. The 

 small specimens here described might elongate the muzzle and 

 internasal plates at maturity, so as to be similar to those of 

 the L. albiventris, but such a change as is necessary to become 

 identical with the L. alticolis is not probable. 



Atractus badius Boie. Ten specimens. 



Nine of these (Nos. 20 and 58) agree in coloration. They 

 are blackish brown, with light transverse bars, which do not 

 cross the median dorsal region. A pale band posterior to orbit. 

 One of these has tha inferior postocular aborted, and in another 

 there are only two superior labials posterior to the orbit on both 

 sides, making but six labials in all. In one specimen (No. 20a) 

 the color is light brown, with several rows of ill-defined rounded 

 darker brown spots. A blackish line follows the extremities of 

 the gastrosteges on each side. Belly black spotted. Size larger 

 than that of the other specimens. 



Acanthophallus colubrinus Gthr. One specimen, No. 57. 

 Leptognathus triseriatas sp. nov. Plate IV, Figure 3. 



Scales in fifteen rows, those of the dorsal series nearly twice 

 as wide as long; those of the row adjacent to it on each side 

 smaller, but larger than the other scales. Bostral plate higher 

 than wide; internasal suture about one-third the prefrontal. 

 Frontal plate as wide as long ; its anterior suture transverse, and 

 longer than the supraocular. Parietals longer than frontal. 

 Nasal large; loral deeper than long, bounding the orbit below 



