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The venation is also often irregular, the characterization of the 

 Deltocephaliis-Plirynoiiiorphits-Thanniotcttix group heing in es- 

 pecial confusion. The extra-Oceanian material at han.l for com- 

 parison being entirely inadequate, I have preferred not to make 

 more new genera than could be heljjied ; at the same time it is 

 doubtful whether the recognized authorities o'l Cicadoidea (for 

 instance, Osborn, Ball, Van Duzee, or Melichar) would accept 

 the generic positions I have assigned to some of the species, or 

 would agree among themselves. The difficulty of sharply limit- 

 ing these genera is evident from the synonymy of several spe- 

 cies, accqrding to these various authors, during the past twenty 

 years, ex. gr. Deltoceplialus osbonii, Athysanus scminudus, Li- 

 motettix striola, and Thamnotettix striatula. 



The study of the Phrynomorphini is not lightly to be under- 

 taken, but, more necessarily perhaps than in any other Cicadoid 

 group, the known species of the world must be revised by sctiiie 

 competent Hemipterist. It would be an immense advance in the 

 knowledge of the group, if Osborn & Ball, whose studies on the 

 North American forms have formed a model for future work, 

 WQuld undertake this task. The nymphs usually present very 

 important specific characters, as these authors have shown, bur 

 ill some genera at least, the number, colour, and disposition of 

 the abtlominal bristly hairs is specifically very valuable, a char- 

 acter neglected up to the present. 



Stcgclytra. 



It is evident that two quite different genera are confused under 

 this name ; they may be separated as follows : 



(a) Vertex anteriorly rounded, angulate in profile; pronotum 

 anteriorly arched, posteriorly slightly emarginatc. Tegmina with 

 2 subapical cells Stegelyira (type alticeps.) 



(b)\"ertex anteriorly subangulate, almost porrect in profile; 

 pronotum anteriorly truncate or subtruncate between the eyes, 

 posteriorly truncate between the scutellar angles. Tegmina with 

 4 subapicals, apicals reticulate Iberia noy. (type bolivari). 



ThoDisonia. 

 3. kirscJibainnii. 

 Add to localities: Bundaberg (Sept. -Dec, K.). 



