1897.] REPTILES AlfD BATEACHIAffS OF CELEBES. 201 



II Frontal not more than twice as broad as the supraocular. 



Upper portion of rostral aa long as or a little longer than its distance from the 



frontal 63. Calamaria muelleri. 



Upper portion of rostral hardly half as long as its distance from the frontal. 



64. Calamaria curia. 



tt Ventrals 21 1-23.5 65. Calamaria gracilis. 



»» First lower labial in contact with its fellow behind the 

 syojphysial. 



Ventrals 232-265 66. Calamaria collaris. 



Ventrals 151-199 67. Calamaria virgulata. 



j3. Four upper labials, second and third entering the eye ; ventrals 

 135-163 68. Calamaria linncei. 



C. Eyes exposed ; posterior maxillary teeth grooved. 



1. Nostrils superior ; nasal shield semidivided and in contact with its 



fellow behind the rostral. 



a. Scales smooth. 



Scales in 19 rows ; a single internasal (rarely two) 69. Hypsirhina plumbea. 



Scales in 21 rows ; two internasals 70. Hypsirhina matannensis. 



Scales in 21 or 23 rows; a single internasal 71. Hypsirhina enhydris. 



h. Scales strongly keeled, in 23 or 25 rows. 



72. CerberV'S rhynchops. 



2. Nostrils lateral ; nasals separated by the internasals. 

 a. Pupil vertical ; scales smooth. 



a. Vertebi-al scales enlarged. 



» Two postooulars. 



Scales in 17 or 19 rows 73. Bipsadomorphus multi- 



maculatus. 



Scales in 21 or 23 rows ; posterior chin-shields not larger than the anterior. 



74. jDipsadomorphiis dendro- 



phihis. 



Scales in 21 or 23 rows ; posterior chin-shields larger than the anterior. 



75. Bipsadomorphus irregu- 



laris. 



*» Three postoculars ; scales in 19 rows. 



76. Bipsadomorphus flavescens. 



/3. Vertebral scales not enlarged 77. Psammodynastes jmlveru- 



lentus. 



h. Pupil horizontal; scales smooth...... 78. Bryophis prasiiius. 



c. Pupil round; scales keeled 79. Chrysopelea ornata. 



D. Eyes exposed ; anterior poison-fangs. 



1. Upper surface of head covered with shields. 



a. Vertebral scales enlarged 80. Bungarus candidus. 



h. Vertebral scales not enlarged. 

 Scales in 15 rows on the body ; 7 upper labials. . 81. Naia bungarus. 

 Scales in 13 rows ; 6 upper labials.. 82. Boliophis intestinalis. 



2. Upper surface of head covered vyith small keeled scales. 



83. Lachesis wagleri. 



