120 W. T. Blanford— iV^o^^5 o« 5o;«e Reptilia [No. 3, 



of the back at the insertion of the wing. Gular appendage covered with 

 large scales, each fully twice as long and broad as the scales of the abdomen. 

 Abdominal scales keeled. A fringe of large pointed triangular scales, 

 many of them nearly equal to the tympanum in breadth, along the hinder 

 part of the thigh and each side of the basal portion of the tail. Tail 

 triangular near the base, with a row of slightly enlarged and sharply 

 keeled scales along its upper edge. Scales below the tail, near the base, 

 but not just behind the anus, larger than those at the sides. 



The colouration above in sj^irit is nearly uniform, the wings are 

 marked with very distinct dusky cross bands, broken u]) by light spots in 

 the only female collected, but these markings are less distinct or wanting 

 in the males, in which the wings are mottled with pale irregular spots. 

 In some the wings are rather darker near the margins, but this is not so 

 distinct as in D. dussumieri, and there is never the dark fringe with narrow 

 sub-parallel pale transverse lines of that species. Throat unspotted, 

 greenish yellow in spirit, pale scarlet beneath the lateral appendages. 



This is probably the largest species of the genus known. The largest 

 specimen, a male, measures 14 inches in extreme length, of which the head 

 and body from nose to anus measure 4*75. Two other males have the 

 body of the same length, the tail being about an inch shorter. A female 

 is less in all its dimensions, nose to anus 3*5, tail 5*75. The sex has been 

 ascertained by dissection. In the female the gular appendage is very 

 short. From the condition of the ovary the specimen is probably adult. 

 All the examples captured were obtained in the forest east of Tavoy, two 

 being from the foot of Nawlabu hill, a high ridge some eight miles east 

 from Tavoy town. 



The nearest described species are D. qihinqiiefasciatus of Penang and 

 D. dussumieri of Malabar, and strange to say the latter, although so 

 widely removed in locality, is the more closely allied of the two in 

 structure. The 2>resent form is distinguished from both by its much 

 larger size and from D. quinquefasciatus by its naked tympanum and 

 longer hind limbs. From D, dussumieri, D. major is known by having 

 much larger supra-labials, each plate near the middle of the lip on each side 

 exceeding the nasal in length, by the enlarged scales at the sides being single 

 and not aggregated into groups, by the much larger scales on the gular sac, 

 and by the colouration of the wdngs. 



Besides the new form, D. maculatus and a species which is probably 

 D. iceniopterus were obtained in the same forest. The typical specimen 

 of the last named species, a male from Chartaboum, was said by Dr. 

 Gunther,* who described it, to have a very low nuchal crest and no tubercle 

 ftbove the orbit. Now in two males of the Tenasserim dragon, there is a 



* Kept. Brit. Ind., p. 126. 



