116 SNAKES OF THE PHILIPPINE ISLANDS 



and a little larger than the posterior. Scales in 25 to 29 rows. 

 Ventrals 130-156, last frequently divided; anal divided; sub- 

 caudals 26-43. Coloration of upper parts very variable; lower 

 parts uniform yellowish white." 



Measurements of Fordonia leucobalia (Sohlegel) . 



mm. 



Total length 930 



Snout to vent 820 



Tail 110 



Remarks. — This species is included on the strength of Boett- 

 ger's record of a specimen from Manila, collected by Moellendorff. 



LANGAHIN.^ 



Hypapophyses developed throughout the vertebral column; 

 nostrils not valvular, lateral; terrestrial snakes. Not poisonous. 



The bulk of this subfamily appears to be confined to Madagas- 

 car. It is surprising to find this single isolated genus Hologer- 

 rhum in the Philippines. This has been placed in the Langahinae 

 on the basis of the diagnostic characters given by Boulenger. 

 Save for this fact it might easily be regarded as a species of 

 Cyclocorus, which it resembles in a superficial manner. 

 Genus HOLOGERRHUM Giinther 



Hologerrhmn GtJNTHER, Cat. Col. Snakes (1858) 186; Boettger, Ber. 

 Senck. Nat. Ges. (1886) 115; Boulenger, Cat. Snakes Brit. Mus. 

 3 (1896) 33; Casto de Eleea, Cat. Fauna Filipinas 1 (1895) 438. 



"Maxillary teeth 20, equal, followed, after a short interspaqe, 

 by a pair of enlarged, grooved fangs ; anterior mandibular teeth 

 strongly enlarged. Head slightly distinct from neck; eye mod- 

 erate, with round pupil. Body cylindrical ; scales smooth, with- 

 out pits, in 17 rows ; ventrals rounded. Tail moderate ; subcau- 

 dals single. Hypapophyses developed throughout the vertebral 

 column '■'■ '■'■ '\" (Boule)iger.) 



This genus, comprising a single species, is confined to the 

 Philippine Islands. 



HOLOGERRHUM PHILIPPINUM Gunther 



Plate 7, fig. 1 

 Hologerrlium philippinum GtiNTHER, Cat. Col. Snakes (1858) 186; 



Proc. Zool. Soc. London (1873) 171, pi. 18, fig. B; Boettger, Ber. 



Senck. Nat. Ges. (1886) 115; Boulenger, Cat. Snakes Brit. Mus. 



3 (1896) 33; Casto de Eleea, Cat. Fauna Filipinas 1 (1895) 438; 



Griffin, Philip. Journ. Sci. § D 6 (1911) 263 (Hologerriim err. 



typ.). 

 Cyclochorus macidatus jAN, Icon. Gen. (1870) 36, pi. 6, fig. 3. 

 Cyclochorus Uneatiis maculata Fischer, Jahrb. wiss. Anst. Hamburg 



2 (1885) 81. 



