FAM. CICADIDjE 21 



interior ulnar area broadened towards apex; ulnar veins distant at base; wings vitreous, with six apical 

 areas; opercula short, transverse; tympanal coverings very strongly developed and sac-like, projecting 

 beyond the lateral abdominal margins in male. 



Type, — T. saccata, Fabricius. 



Geographical distribution of species. — Australia. 



1. T. saccata. Australia. 



i \ i«»Yi saccata, Fabricius. Syst. Rhyng". p. 34.9 (i8o3). 

 Cicada saccata, Guerin. Mag. Zool. p. So, t. 238 1 iS38j. 



« Tin Double Drummer », Froggatt, Agric. Gaz. N. S. Wales, Vol. 14, 

 p. 340, 419, f. 3 (igo3). 



2. T. sessiiiba. — PI. 3, Figs. I 7a, b, c. Australia. 



Thopha sessiiiba. Distant, Ann. Mag-. Xat. Hist. 16), Vol. 9. p. 314 (1892;. 

 Thoplia stentor, Buckton. The Home University Mag., etc. 'Haslemere), 

 Vol. 1, p. 371 (18981. 



3. T. colorata. S. Australia. 



Thopha colorata. Distant. Ann. Mag. Nat. Hist. 17), Vol. 20, p. 411 (1907I. 



4. T. nigricans. N. Queensland. 



i/ia nigricans, Distant. Ann. Soc. Ent. Belg. (1910) p. 413. 



18. Genus ARUNTA, Distant 



Arunta. Distant, Ann. Mag. Nat. Hist. (7), Vol. 14, p. 3o2 (1904). 



Characters. — Head transverse, moderately truncate in front of eyes, between eyes much 

 narrower than base of mesonotum; rostrum reaching the posterior coxae; pronotum moderately broad, 

 its breadth considerably less than length of both pro- and mesonotum (including the basal cruciform 

 elevation; ; tympana very largely developed and sac-like, their apices obliquely extending beyond the 

 lateral margins of the abdomen and to about half its length ; opercula very small, not extending to base 

 of metasternum, placed wide apart, and with their apical margins convex; anterior femora incrassated 

 and spined: posterior tibia; with a few lateral fine spines; tegmina and wings talc-like, tegmina with 

 eight apical areas. 



Type. — A. perulata, Guerin. 



Geographical distribution of species. — Australia. 



1 A. perulata. — PI. 2, Figs. I 8a, b, C. Australia. 



Cicada perulata, Guerin. Vuy. «Coquille», Zool. Vol. 2 (2), p. 180, t. 10, 

 f. 5, 5<t (i83o). 

 2. A. interdusa. Australia. 



Thopha interdusa, Walker. List Horn. Suppl. p. 5 (i85Si. 



Thopha, n. sp. Walker, ibidem. Vol. 4, t. 1, f. 6 (i85i). 



Arunta flava, Ashton, Rec. Australian Mus. Vol. 9, p. 76. pi. 7, figs 1,21 1912). 



Division CYCLOCH ILARIA 



Cyclochilaria. Distant, Ann. Mag. Nat. Hist. (7), Vol. 14, p. 3o2 (1904). 



Characters. — - Abdomen broad, unsymmetrical, medially widened and distinctly abbreviated 

 posteriorly, in the male sex (principally) obliquely depressed on each side, its greatest width almost 

 double that of head between eyes ; opercula not extending beyond base of metasternum. 



This division is found in both Australia and Tasmania. 



