FAM. MEMBKACIDyE 



249 



siiiuate; eyes large, ovate and protruding; ocelli large, conspicuous, a little farther from each other 

 than from the eyes and situated somewhat above a line dravvn through centers of ev^es; inferior margins 

 of genae strongl}^ angulate; clypeus broad, distinctly trilobed, extending for more than half its length 

 below inferior margins of genje, tip rounded and pilose. Pronotum strongly convex and gibbous, 

 bearing a pair of suprahumerals and a heavy, sinuate posterior process ; metopidium convex, vertical, 

 higher than broad; median carina faintly percurrent; humeral angles large, triangular and blunt; 

 suprahumeral horns varying greatly in size and structure, ranging from smail protuberances as in the 

 type species to large, wide-spreading horns as in S. giganticus Goding, but usually robust, subconical, 

 weakly carinate, as long or longer than the distance between their bases, extending outward and 

 upward ; posterior process heavy, tectiform, strongly sinuate, lying close to the scutellum and impinging 

 on the tegmina, tip acute, decurved, and reaching almost to the tips of the tegmina; scutellum sub- 

 triangular, well exposed on each side, tip notched. Tegmina broad, hyaline; base narrowly coriaceous 

 and punctate ; veins strong ; five apical and two discoidal cells ; tip pointed ; apicaV limbus well developed. 

 Legs heavy; femora cylindrical; tibias triquerate, lightly sulcate and finely spined; hind tarsi longest. 



Type australis Fairmaire. 



Geographical distpibution : This genus is limited to the Australian Region and seems to be 

 one of the dominant forms of that part of the world. 



1. acM^jcoyM/s Goding, Journ. N. Y. Ent. Soc. XXXIV : 244 (1926). Australia, Queensland, Ku- 



randa. 



2. affinis Distant, Rhynch. Notes 25 (1916). New South Wales, Sydney. 



3. aKs^ra/w Fairmaire, Rev. Memb. 5i8. 3o (1846). — Pl. I 3,fig. 2 I 7. Australia, Tasmania, New 



obstans Walker, List Hom. B. M. Suppl. 163 (i858). 

 Iiinotatus Walker, Ins. Saund. 81 (i858). 



4. brevicornis Goding, Mon. Aus. Memb. 21 (igoS). 



5. castancus Distant, Rhynch. Notes 25 (1916). 



6. curvicaudus Goding, Mon. Aus. Memb. 24 (igoS) 



7. giganticus Goding, Mon. Aus. Memb. 20 (igoS). 



8. insularis Distant, Rhynch. Notes 26 (1916). 



9. luteus Buckton, Mon. Memb. 244 (1916). 

 10. tepperi Godixng, Mon. Aus. Memb. 22 (igoS). 



South VVales, Nev/ HoIIand, 



Victoria, South Australia, 



VVilliamstown. 

 South Australia, West Austra- 



lia, Mt. Barker. 

 Australia. 

 New South Wales, Tweed 



River. 

 South Australia. 

 Australia, New Britain Isl. 

 Australia, Adelaide. 

 West Australia, Bunburj-. 



247. GENUS CENTRUCHUS STAL 



Centruchus Stal, Hem. Afr. IV : 93 (i866). 



Characteps : This is a genus of comparatively small insects characterized by oblique supra- 

 humerals, a non-gibbous pronotum and more or less flattened dorsum, a short, straight posterior 

 process and with the veins of the tegmina straight with the apical cells short and broad. Head sub- 

 quadrate, roughly sculptured, twice as broad as high; base only slightly arcuate but distinctly sinuate; 

 eyes small and globular; ocelli small and inconspicuous but somewhat elevated, about equidistant from 

 each other and from the eyes and situated above a line drawn through centers of eyes ; inferior margins 



