674 Mr. W. L. Distant's Additions to a 



elevation, posterior margins of abdominal segments, and the coxse 

 ochraceous. 



Tegmina and wings talc-like, the venation ochraceous ; basal cell, 

 and basal streak to tegmina and extreme base of wings, black. 



Face gibbous, obscurely striate ; rostrum just reaching the pos- 

 terior ooxse ; anterior femora armed with two long robust spines 

 beneath. 



Long. excl. tegm. $ . 34 millim. Exp. tegm. 100 millim. 



Hab. West Australia; Cossack. 



I have not seen the male of this fine species. 



Suljfamily TIBICENIN^. 

 Hamza, gen. nov. 



$ . With the appearance of the genus Platyple'ura, but with the 

 tympana largely uncovered. 



Body short, broad ; head including eyes about as wide as the 

 anterior margin of the mesonotum ; ocelli placed nearer each other 

 than to eyes ; pronotum with the lateral margins ampliated, obtusely 

 angulated near middle ; anterior femora distinctly tuberculately 

 spined ; metasternum slightly elevated, broadly centrally sulcate, 

 and sinuately truncated ; tympana only about half covered by the 

 dilated and expanded lateral areas of the basal abdominal segment ; 

 oj)ercula short, broad, their apices convexly rounded ; tegmina with 

 the basal cell broad, with at least four angles, ulnar veins widely 

 separated at their bases. 



Type, H. louruensis, Dist. 



Hamza houruensis. (PL XXX, fig. 5, a, h.) 



Platypleura houruensis, Dist., Ann. Mag. Nat. Hist. (7), 

 vol. i, p. 97 (1898). 



This species was originally described from a female 

 specimen, and it is only since I have acquired examples of 

 the male sex that I have seen its great generic division 

 from Platyplmra, which renders it a member of the Tihi- 

 ccninte. This is an instance so often reUed on by some 

 advocates of mimicry, a suggestion, at least in this case, 

 which would certainly not explain a strong case of 

 superficial similarity in evolution. 



Hob. Malay Archipelago ; Bouru. 



