Occasional Papers of the Museum of Zoology 7 



anteriorly and diverging somewhat posteriorly; other head shields 

 normal for the genus. 



Total length, 810 mm.; tail length, 108 mm.; tail, therefore, 

 13 .3 per cent of total length. Sex, male. 



Pattern of body (Plate I, Fig. i) composed of 14 whitish rings 

 about one and one-half scales in width above and about two on the 

 first row of scales. They are continuous across the belly, and may 

 be slightly mottled on the sides with darker. Bordering the 

 whitish rings are annuli of black from three to four scales wide on 

 the mid-dorsal line, about two on the first row of scales, and about 

 one or two scutes in width on the belly. Between the pairs of 

 black rings are broad encircling areas of red, from six to nine scales 

 in width on the mid-dorsal line anteriorly, and three scales wide 

 near the vent, but increasing to nine to eleven scales in width on 

 the first row of scales anteriorly. On the tail are four whitish 

 annuli separated by broad rings of black. On the belly in the red 

 spaces posteriorly there is a little dark mottling, suggestive of L. 

 triangulum annulata (Kennicott) in which these spaces are totally 

 black. 



The head is black as far back as a line from the posterior end of 

 the parietal suture to the lower posterior angle of the fifth upper 

 labial, except for a conspicuous mottling with lighter on all the 

 plates anterior to the frontal. The chin and throat are whitish 

 except for considerable black pigment on the anterior lower labials 

 and a little on the chin shields. The first black ring is separated 

 from the parietals by two scales and is slightly interrupted on the 

 throat. 



Remarks: The structural features of this form may be seen at a 

 glance in the accompanying list of specimens examined. 



The present material indicates that this is a fairly homogeneous 

 form, characterized (a) by a low number of pairs of black annuli, 

 separated by broad red interspaces, {b) by an absence of black tips 



