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D.G. BROADLEY AND V. WALLACH 



© 



Fig. 2 Skulls of: A. Xyelodontophis uluguruensis; B. Thelotornis mossambicanus; C. Rhamnophis batesii; D. Dispholidus typus. 



has a black spot on the side of the neck (Broadley, 1983, fig. 144), in 

 this species the inflation may extend half way down the body. The 

 inflated throat of Thelotornis is grey-white with distinctive black 

 markings - crossbars in T. kirtlandii, chevrons in T. usambaricus, 

 one or two elongate blotches in T. mossambicanus and two larger 

 dorsally extensive blotches in T. capensis. 



8. Temporals and occipitals. In Thrasops there are almost invari- 

 ably 1 + 1 temporals and there are no enlarged occipital shields. In 



Rhamnophis there is a single large temporal: R. batesii has four large 

 occipitals, while R. aethiopissa has two very large ones. In 

 Dispholidus, Thelotornis and the Dagger-tooth Vine Snake there are 

 usually 1 + 2 temporals and three occipitals (or two separated by a 

 smaller interoccipital). The Philothamnini tend to have more numer- 

 ous temporals (1 + 1 up to 2 + 2 + 2) and no enlarged occipitals. 



9. Supralabials (Table 1). Thrasops usually has 8 supralabials, the 

 fourth and fifth entering the orbit. Rhamnophis batesii has 7 or 8, 4 



