40 



The venation is also often irregular, the characterization of the 

 Dcltoccphaliis-Plirynoiiwrphiis-Tliaiiuiofcttix group being in es- 

 pecial confusion. The extra-Oceanian material at hand for com- 

 parison being entirely inadequate, I liave preferred not to make 

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

 doubtful whether the recognized authorities qh 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, according to these various authors, during the past twenty 

 }ears, ex. gr. Deltocephahis oshorni, Athysaiius sciniiiudits, Li- 

 inotetti.v striola, and Thamnotcttix striafiila. 



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 soaiie 

 competent Hemipterist. It woidd 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, but 

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

 the abdominal bristly hairs is specificallv very valuable, a char- 

 acter neglected up to the present. 



S'tcgciytra. 



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 emarginate. Tegmina with 

 2 subapical cells Stegclytra (type alticcps.) 



(b) Vertex anteriorly subangidate, almost porrect in profile; 

 pronotum anteriorly truncate oi- subtruncate between the eyes, 

 jjosteriorly truncate between the scutellar angles. Tegmina with 

 4 subapicals, apicals reticulate Iberia nnv. (tN'pe holli>ari). 



Thoinsoiiia. 

 3. klrschbaiimii. 

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



