78 



HELLER 



Ten females are in the collection, all of them varying considerably 

 from the above. Sides spotted in some, others with breast dusky. 

 Red of sides not always running high up on dorsum. Tail usually 

 dark at tip like dorsal surface. 



Length of head and body 70 to 76 mm. 



The coloration of this species is quite distinctive and separates it at 

 once from reddish specimens of T. g. grayi. 



Occurs abundantly in the central part of Duncan Island. Espe- 

 cially common in the old crater at the north end where their colora- 

 tion harmonizes with the red soil forming the floor of the crater; 

 much rarer near the coast. Their food consists exclusively of insects. 

 The stomachs examined contained grasshoppers, caterpillars, grubs, 

 beetles, etc. 



MEASUREMENTS OF Tro^iduvus duncatiensis . all adult. 



TROPIDURUS DELANONIS Baur. 



Tropidurus grayi Cope, Proc. U. S. Nat. Mus., xii, p. 145, 1889 (part). — 



BouL., Ann. N. H. (6), vii, p. 502, 1891 (part). 

 Tropidurus delanonis Baur, Biol. Centralbl., x, p. 476, 1890, and Festschr 



Leuckart, p. 269, 1892. 

 Tropidurus hoodetisis Baur, Festschr. Leuckart, 1892, p. 263. 



Range. — Hood Island (Albatross 1SS8, Baur, Hopkins Stanford 

 Expedition) ; Gardner Island (Hopkins Stanford Expedition). 



Specific Characters. — Sides of tail red, belly and tail inferiorly 

 yellowish, male spotted on breast, female usually immaculate below. 

 Parietal plate small, width one and one fourth internasal width or less, 

 bordered on each side by a single large temporal between which it is 

 sunk. Scales in circumference of body 70 to 80. Large, length of 

 head and body in male iii to 125 mm., female 85 to 96 mm. 



Head plates varying considerably, in some specimens nearly as 

 divided as in T. bivittatiis. The parietal however is smaller than in 

 other species, its width varying from one to one and one fourth inter- 

 nasal width. Supraoculars usually narrow, six or seven. Height of 

 dorsal crest in male at nape one half internasal distance. 



