in the Collection of the British Museum. 25 



appear on the tail. A very indistinct blackish horizontal 

 streak behind the eye. Lower parts uniform light greenish. 



One example was obtained by one of Mr. Salvin's collectors 

 in Costa Rica. It has lost a considerable portion of the tail, 

 the head and body being 29 inches long. 



Hwpsidojphrys niger. 



Similar in habit and form of the head to H. cceruleus. 

 Scales keeled, much imbricate, thin and loose, in thirteen 

 series, those of the outermost series much smaller and shorter 

 than the others. One anterior, three posterior oculars, the 

 latter very narrow. Eight upper labials, the fourth and fifth 

 entering the orbit. Temporals 1 + 1. Ventrals 203, not 

 keeled on the sides ; anal bifid ; subcaudals 140. Uniform 

 black, except the lower jaw, which is of a smutty brown. 



Gaboon. One specimen, 61 inches long, the tail being 

 17 inches. 



Dendrophis salomonis. 



Allied to D. caliigastra and striolata. Scales in thirteen 

 rows. Loreal present, sometimes confluent with the posterior 

 frontal. Eight upper labials, the fourth and fifth entering the 

 orbit. One prajocular, not extending to the vertical ; two 

 postoculars ; temporals 1 + 2 + 2. Ventrals 193 or 194, 

 strongly keeled ; subcaudals 130. Scales with a single apical 

 pore ; vertebral scales large. Yellowish, with iridescent re- 

 flexions. The membrane between the scales is black ; many 

 scales with an elongate white spot on the outer margin. A 

 blackish ill-defined band from the nostril along the side of the 

 head and neck. Lower parts uniform yellow, with a dark 

 central line along the abdomen. 



Solomon Islands. The larger of two examples is 32 inches 

 long, tail 12| inches. 



Ahcetulla diplotropis. PI. VI. fig. A. 



Scales in fifteen rows, smooth, with the exception of those 

 forming the two series nearest to the vertebral series ; these 

 scales are strongly keeled, the keels forming a continuous 

 raised black line, as in the genus Diijlotrojpis. Head as in ^. 

 liocercus. Rostral broader than deep ; vertical bell-shaped, 

 shorter than the occipitals, Avhich are rounded behind. Loreal 

 twice as long as deep ; prgeocular not reaching the vexlical ; 

 two postoculars. Eight upper labials, the fourth and fifth 

 entering the orbit. Temporals 1 + 2. Eye of moderate size, 

 with round pupil. Ventrals 178-181, with a very faint lateral 

 keel ; anal 1/1 ; subcaudals 140. The posterior maxillary 



