326 Dr. A. Giintlier on the 



contact with the chin -shields ; loreal not twice as long as 

 broad; temporal shields 1+2. Scales smooth, in 15 rows. 

 Head of moderate size, not elongate or depressed ; body and 

 tail moderately slender. Uniform green ; skin between the 

 scales black, each scale with a white spot on the basal half of 

 its outer margin. 



One specimen was obtained from Monbuttu by Emin Pasha ; 

 it is 29 inches long, the head measuring | inch and the tail 

 10 inches. 



AhcetuUa sMranay sp. n. 



Ventral shields slightly keeled, 157 ; anal bifid ; upper 

 labials nine, the fourth, fifth, and sixth entering the orbit ; 

 one anteocular, two postoculars ; six of the lower labials are 

 in contact with the chin-shields ; loreal not twice as long as 

 deep ; temporal shields 14-2 + 2. Scales smooth, in 15 

 series. Head of moderate size, not depressed or elongate ; 

 body and tail moderately slender. Green ; skin between the 

 scales black ; each scale with a white spot on the basal half 

 of its outer margin. The back of the anterior half of the 

 trunk is crossed by narrow, closely set, rather irregular, black 

 cross bars, which become narrower behind and disappear 

 altogether in the middle of the length of the trunk. 



One specimen was obtained at the Blantyre Mission Station 

 on the Shire River. It is 18 inches long, the head measuring 

 iV inch and the tail 6 inches. 



AhcetuUa Bocagiiy sp. n. 



Ventral shields keeled, 196 ; anal bifid ; upper labials nine, 

 the fifth and sixth entering the orbit; one anteocular, two 

 postoculars ; six of the lower labials are in contact with the 

 chin-shields ; loreal elongate, at least twice as long as deep ; 

 temporal shields 2 + 2 + 2. Scales smooth, in 15 series. 

 Head rather small, not elongate ; body and tail very slender. 

 Uniform green ; skin betw een the scales black, each scale 

 with a whitish spot. 



One adult specimen was obtained by Lieut. Cameron in 

 Angola ; it is 35 inches long, the head measuring f inch, and 

 the tail 11 inches. 



AhcetuUa graciUima^ sp. n. 



Ventral shields without lateral keels, 180; anal bifid; 

 upper labials nine, tlie fourth, fifth, and sixth entering the 



