572 MONOGEAPH OF THE AUSTRALIAN CICADIDJ^., 



behind which is a transverse stripe, black. Tegmina vitreous, 

 venation yellow, brown towards apex, costa striped with black, 

 interior vein black. Wings vitreous, venation yellow. Abdomen 

 ferruginous, segments more or less banded at base with black, 

 the sacs red; below piceous, with irregular ferruginous spots, and 

 floury pubescence. Legs ferruginous, marked with yellow and 

 black; pectus with a row of yellow spots on each side. Long. 

 Corp. 50 mm.; exp. teg. 140 mm. 



Hab. — New Holland (Stal); South Australia; Brisbane, Q.; 

 Victoria; Sydney, Newcastle, N.S.W. 



This is our largest species, and is popularl}^ known as the 

 " Double Drummer," in reference to the swollen drums of the 

 male projecting on the sides of the abdomen. It frequents the 

 more open forest country, clinging to the trunks of the large 

 rough-barked Eucalj^pts, where the male produces its deep dis- 

 tinctive note, likened by Bennett to chcock uttered three times in 

 rapid succession and then a break before it is again repeated. 



*Thopha sessiliba, Distant. 



1892. Ann. Mag. Nat. Hist. (6) ix. p. 314. 



1903. Frogg., Agr. Gaz. p. 341; and Misc. Pub. 643, p. 8. 



Body above dark ochraceous. Head with the margin of front 

 and a broad fascia between the eyes pale castaneous. Proiiotum 

 with the incisures pale castaneous, the lateral and posterior 

 margins stramineous. Mesonotum with four obconical castaneous 

 spots, the central pair smallest. Abdomen castaneous above, the 

 base ochreous, the apical segment thickly greyishly pilose. Body 

 beneath ochreous; the face, fascia between face and eyes, legs, 

 abdomen, and inflated tympana castaneous; anterior margins of 

 tympana ochraceous beneath. Tegmina and wings pale hyaline, 

 the venation ochraceous, becoming darker towards apices; the 

 costal membrane and basal area ochraceous; anterior margin of 

 basal area and anterior margin of claval area dark castaneous; 

 claval area pale sanguineous. Long. corp. $ 42 mm.; exp. teg. 

 126 mm. 



Hab. — Australia, Sydney (Distant); Northern Territory, S. A.; 

 Townsville, Queensland. 



