FAM. CICADID/E 3 



in the Eastern Palasaretic Region and in India, has been recorded as appearing in swarms at intervals 

 of about six years. 



The full synonomy of the Genera and Species will be found in my. Synonymic Catalogue of Homop- 

 :-. i. Part., i. C icad id 'is (1906); I have here reduced it to a smaller compass, but always referring (if 

 p issible) to where a figure has been given. 



SYNOPSIS OF SUBFAMILIES 



A. Tympanal coverings present, 



&. Tympanal coverings entirely concealing tympanal orifices Subfam. Cicadix.-e. r- 3 



a'. Tympanal coverings imperfect, more or less exposing orifices Subfam. CeaniNjE. 



B. Tympanal coverings absent Subfam. TiBicixix.fi. 



SUBFAM. CICADIN/E 



Cicadinae. Distant, Mori. Orient. Cicad. p. 3 (1889). 



Division POLYNEURARIA 

 Polyneuraria. Distant. Ann. Mag. Nat. Hist. (7) Vol. 14, p. 2g3 (1904). 



Characters. — Lateral margins of the pronotum ampliatedand more or less angularly produced. 

 Head (including eyes) about as wide or wider than base of mesonotum, or sometimes little more than 

 two-thirds of its width; costal membrane of tegmina sometimes much arched and dilated, the apical cells 

 usually eight in number, but sometimes smaller in size and much mose numerous; tegmina varying in 

 hue from pale hyaline to dark opaque. 



This Division according to present knowledge is confined to the Ethiopian, Oriental and Malayan 

 Regions. A species of the genus Platypleura has also been recorded from North Australia. Thirteen genera 

 can be now enumerated. 



SYNOPSIS OF GENERA 



I. Tegmina with eight apical areas. 



1. Head (including eyes) about as wide or wider than base of mesonotum. 



A. Costal membrane of tegmina not prominently dilated nor arched at base. 



a. Head frontally produced, not truncate, above about as long as prono- 



tum (excluding its posterior margin). 



b. Pronotum with its posterior margin only a little less in length than 



that of its vertex ; its lateral margins medially angulately 

 expanded, the angular apices reaching to or nearly to the apex 

 of basal cell of tegmina 1. Genus Ioba. 



c. Pronotum with its posterior margin Utile more than half the length 



of its vertex ; its lateral margins medially angulately expanded, the 

 angular apices only reaching to about middle of basal cell of 

 tegmina 2. Genus Muaxsa. 



