362 The Philippine Journal of Science 1917 



yellow bars, less heavy in front of anus ; underside of tail with a 

 median dark line. 



Variation. — Five specimens taken agree very well, save that 

 the barring on the belly is much less distinct in very young 

 specimens. 



It will be observed that the females have more ventrals and 

 less subcaudals than the males. 



Remarks. — It seems that the separation of this form is well 

 justified.^ The females have an average of 13 more ventrals 

 and 1 more subcaudal than the average of 20 specimens available 

 for counts from other parts of the Islands. The males have an 

 average of 8 more ventrals and 1 more subcaudal than 12 males 

 available for counts from other islands. Moreover the species 

 grows to a larger size than the typical form, and the eye is 

 larger. 



Genus PSEUDORHABDIUM Jan 



Rabdion, part., Dumeril and Bibron, Mem. Acad. Sci. (1853), 23, 



441; Erp. Gen, (1854), 7, 115. 

 Pseudorabdion Jan, Arch. Zool. Anat. Phys. (1862), 2, 10. 

 Oxycalamus Gunther, Rept. Brit. Ind. (1864), 199. 

 Pseudorhabdium Boulenger, Cat. Snakes Brit. Mus. (1894), 2, 328. 



Maxillary teeth, 10 to 12, subequal; anterior mandibulary 

 teeth slightlj' longer than the posterior. Head not distinct from 

 neck; eye small, with round pupil; nostril pierced in a minute 

 nasal; intemasals small; loreal present or absent; preocular 

 small or absent; no temporals, parietals in contact with labials. 

 Body cylindrical ; scales smooth, without apical pits, in 15 rows ; 

 ventrals rounded. Tail short; subcaudals in 2 rows. Malay 

 Peninsula and Archipelago. Three species of this genus are 

 known, and all of them are found in the Philippines. 



Key to the species of Pseudorhabdium. 



a*. No loreal present. 



6*. Frontal longer than broad. Preocular usually present. Supraocular 



small lon^ceps Cantor. 



6'. Frontal little broader than long; supraoculars smaller still. Pre- 

 ocular wanting oxycephalum Gunther. 



o'. Loreal present. Frontal broader than long'; no preocular. 



mcnamarae sp. nov. 



' Boulenger lists a specimen from Negros having the anterior part of 

 the body black ventrally; it is not at all improbable that this represents a 

 specimen of this subspecies. 



