528 Oil Reptiles and Batr^chians from Tropical Africa. 



modify the synopsis of tlie species, given by me in Ann. 

 & Mag. Nat. Hist. 1863, xi. p. 283, thus :— 



I. The eubcaudal scutes -ttithout lateral keels : Chlorophis. 



A. Ventral scute? not keeled. 



1. Three labial shields (the fourth, fifth, 



and sixth) enter the orbit. 

 a. Ventral scutes 151-158. 



a. Uniform green ; each scale with a 



white basal spot . . : C. Emini, Gthr. 



/3. Back with black cross bands ; scales 



without white spots C. Giintheri, Pfeflf. 



h. "\'entral scutes 180 C. ff)-acilli77ius, Gthr. 



2. Three labial shields (the third, fourth, 



and fifth) enter the orbit C. omatus, Boc. 



3. Two labial shields enter the orbit .... C. hoplogaster, Gthr. 



B. Ventral scutes keeled. 



1. Anal single C.heteroderm%i8,'H.&\\o\v . 



2. Anal double. 



a. Upper labials nine, three entering the 



orbit. 

 a. Forepartof the body uniform green. C. tVre^w/a?*^, Leach. 

 ^. Fore part of the body barred with 



black C. shirana, Gthr. 



b. Upper labials eight, two entering the 



orbit. 

 a. The fourth and fifth enter the orbit. 



aa. One anterior temporal C. neglectus, Ptrs. 



bb. Two anterior temporals C. natalensis, Smith. 



0. The fifth and sixth enter the orbit. C. atiffolensis, Bocage. 



c. Upper labials eight (seven), three en- 



tering the orbit C. heterolepidotus, Gthr. 



II. The subcaudal scutes with lateral keels : Philothamnus. (Upper 



labials nine in all species known.) 



A. Scales in fifteen rows. 



1. Three labials entering the orbit. 



a. Two anterior temporals P. semivariegattta^ Smith. 



b. One anterior temporal. 

 a. Unifoiin green. 



aa. Ventrals 164 P. nitidus, Gthr. 



bb. Ventrals 207-219 P. thomensts, Boc. 



/3. A brown vertebral stripe P. dorsalis, Bocage. 



2. Two labials entering the orbit. 



a. Ventrals 169-173 P. Kirhii, Gthr. 



/3. Ventrals 196 P. Bocagii, Gthr. 



B. Scales in thirteen rows P. Girardi, Boc. 



Thrasops JacTcsonii, sp. n. 



One specimen from Kavirondo. 



Scales in nineteen rows, keeled, in transverse, scarcely 

 oblique series, those of the median row being somewhat larger. 



