EAST AFRICAN REPTILES AND AMPHIBIANS 37 



Doubtless this specimen did come from Kakumega, as I have ex- 

 amined many from that locahty collected by Mr. H. J. Allen Tm-ner. 



Family VIPERIDAE 



Genus CAUSUS Wagler 



CAUSUS RHOMBEATUS (Lichtenstein) 



Sepedon rhombeatus Lichtenstein, 1823, Verz. Doubl. Mus. Berlin, p. 106. 



Causus rhombeatus Stejneger, 1893, Proc. U. S. Nat. Mus., vol. 16, p. 735. — 

 LovERiDGE, 1916, Journ. E. Afr. & Uganda Nat. Hist. Soc, vol. 5, p. 87. — 

 Boulenger, 1896, Cat. Snakes Brit. Mus., vol. 3, p. 467. 



2 (U.S.N. M. 16757-8) Kilimanjaro, T. T. (Abbott) 1888-9. 

 2 (U.S.N.M. 22092-3) Mt. Kenja, K. C. (Chanler) 1892. 

 2 (U. S. N. M. 40896-42007) Juja Farm, K. C. (Sm. Afr. Exped.) 1909. 

 8 (U.S.N.M. 40961-4, 42486, 62922-4) Nairobi and vicinity, K. C. 

 (Sm. Afr. Exped. & Loveridge) V. D. 



1 (U.S.N.M. 42160) Kampala, U. (Sm. Afr. Exped.) 1909. 



Mid-body scale rows, 17 to 19; ventrals, 143 to 156; anals, entire; 

 subcaudals, 21 to 26; labials, 6, usually the fifth the largest but some- 

 times the third or fourth; temporals 2 + 3 in all except three snakes, 

 where they are 2 + 4. The largest snake (No. 40961) measures 596 

 (540 + 56) mm. 



CAUSUS RESIMUS (Peters) 



Heterophis resimus Peters, 1862, Monatsber. Akad. Wiss. Berlin, p. 277, pi. — , 



fig. 4. (Gebel Ghule, Senaar.) 

 Causus nasalis Stejneger, 1893, Proc. U. S. Nat. Mus., vol. 16, p. 735. 

 Causus resimus Boulenger, 1896, Cat. Snakes Brit. Mus., vol. 3, p. 468. 



2 (U.S.N.M. 20088-9) Tana River, K. C. (Chanler) 1892. 



3 (U.S.N.M. 49016, 49022) Kenya Colony. (Heller) 1911-12. 



The first two specimens are paratypes of C. nasalis Stejneger. 

 Mid-body scale rows, 20 to 22; ventrals, 134 to 153; anals entire; 

 subcaudals, 21 to 25; labials, 6, the third the largest, except in No. 

 49016, where the second is the largest on one side only. In No. 49016 

 the intemasal is in contact with the loreal on the left side, but not 

 on the right; m the others it is excluded from contact on both sides. 

 The largest snake (No. 49022) measures 492 (444 + 48) mm. 



CAUSUS DEFILIPPn (Jan) 



Heierodon defilippii Jan, 1862, Arch. Zool. Anat. Phys., vol. 2, p. 225. 

 Causus defilippii Boulenger, 1896, Cat. Snakes Brit. Mus., vol. 3, p. 469. — 

 Loveridge, 1923, Proc. Zool. Soc. London, p. 894. 



7 (U.S.N.M. 62925-31) Morogoro, T. T. (Loveridge) 1916. 



Mid-body scale rows, 17; ventrals, 112 to 123; anals entire; sub- 

 caudals, 13 to 16; labials, 6, the fifth usually the largest. In every 

 specimen the frontal is longer than its distance from the end of the 

 snout. These specimens are 7 of the series of 15 discussed in the 

 Proceedings of the Zoological Society for 1923. 



