232 Mr. R. Broom on the 



with the upperside markings showing through, and with a 

 well-defined central whitish band becoming more or less 

 merged with the ground-colour at anal angle. 



Expanse 82 mm. 



Hob. Haiti, no precise locality. 



Type in Coll. Joicey. 



Ancea xenocrates punctimarginale, subsp. n. 



$ . Differs from xenocrates xenocrates from Bolivia in the 

 fore wing by having no blue scaling at tornus and in the 

 blue subapical spots being widely separated and showing no 

 tendency to unite inwards. Hind wing with a series of 

 rather small triangular blue marginal spots, not a band as in 

 the Bolivian form. 



? . Shows much less difference from type-form. The 

 margin of hind wing is yellow banded as in the ? from 

 Bolivia. There is an extra yellow spot between veins 3, 4, 

 smaller than that between veins 2, 3. 



Expanse 82 mm. 



Hob. French Guiana, St. Jean de Maroni. 



1 c?,l ?• 



Type in Coll. Joicey. 



The occurrence in French Guiana of a species only known 

 hitherto from Bolivia and the Upper Amazons (Pebas) is 

 strange, and at first suggests specific difference and not sub- 

 specific. But the species is rare, the $ exceedingly so, and 

 its range may lie across the interior of Brazil where it could 

 easily remain undetected. The species has been chiefly 

 known from Eastern Bolivia, but the few specimens known 

 from Pebas belong to the same form with a blue marginal 

 hind-wing band in the $ . 



XXVI. — Observations on the Genus Lysorophus, Cope. 

 By Robert Broom. With a Note, by Prof. W. J. Sollas. 



So much has already been written about this little vertebrate 

 by Broili, Case, v. Huene, Moodie, Finney, and Williston 

 that it might seem doubtful wisdom to add another paper 

 to the already extensive literature, and more especially as 

 my observations are on specimens already carefully examined 

 by Case and v. Huene ; but when one considers that 

 Lysorophus is the most remarkable land vertebrate that has 

 been discovered for many years, and that opinions not only 

 differ as to its affinities but also as to the interpretation of a 

 number of the cranial elements, a further review of even the 

 present evidences seems justifiable. 



