ORIENTAL CICADID.E. 



103 



Siibfam. TIBICENINiE. 



In this subfamily I am now able to inchule twenty Oriental genera, but more doubtless 

 remain to be discovered in the particularly rich Cicadan fauna here studied. In the following 

 Synoi)sis of Genera the salient characters liave been sought ; but all such " keys " are imperfect, 

 and Nature does not readily lend herself to such a method of interpretation. The Synopsis is 

 therefore only a contribution '^ pour servir," and is strictly limited to the genera under consider- 

 ation ; if a larger field were examined the analytical treatment would have to be altered. 



In the sequence of genera it must also be remembered that the method here pursued is 

 artilicial, and in no sense guided by those evolutionary principles which alone give reason to 

 classification. But this is not the choice of the writer, who has only dried mature specific 

 forms before him, and can but endeavour to produce some kind of order out of the chaos of a 

 large but neglected family of insects. 



SYNOPSIS OF GENEEA. 



1. Tegmiiia and wings opaquely coloured. ...... 



2. Tegmina more or less opaquely coloured ; wings more or less transparent, sometimes 



pale hyaline. 

 a. Apical areas to tegmina numerous, venation reticulate. .... 



tui. Generally ten, sometimes only nine, apical areas to tegmina. 

 aaa. Generally' eight, sometimes nine and even ten, ajjical areas to tegmina. 

 b. Head normal, not conically produced in front. 



e. Head with the face longitudinally sulcated. ..... 



cc. Head with the face not sulcated. ...... 



lb. Head conically produced in front. ....... 



3. Tegmina and wings almost completely hyaline. 



d. Opercula large, convex and inflated, projecting beyond the lateral margins of 

 the abdomen. ........ 



dd. Opercula of ordinary structure. 



e. Head rectangularly produced in front of inner margin of the eyes. 

 ee. Head convexly and globosely produced in front of inner margin of the eyes 

 eee. Head not rectangularly or convexly produced in front of inner margin of 

 the eyes. 

 /. Basal cruciform elevation to mesonotum much narrowed 

 Xf'. Basal cruciform elevation to mesonotum of ordinary structure. 



g. Ulnar veins to tegmina well separated and distant at their origin from 

 end of basal cell. 

 /(. Tympanal coverings practically absent. .... 



hh. Tympanal coverings rudimentary. 



i. Basal cell of tegmina short, not twice as broad as long. - 

 ii. Basal cell of tegmina about twice as broad as long. 



k. Interior ulnar area of tegmina a little wider at apex than at base. 

 kk. Interior ulnar area of tegmina not wider at apex than at base. 

 I. Second and third ventral segments in male with lateral tubercles. 

 II. Second and third ventral segments in male without tubercles. 

 {tg. Ulnar veins to tegmina united at their origin from end of basal cell. - 

 III. Abdomen more or less inflated in the male sex. 



(/;///. Ulnar veins to tegmina well separated and distant at their origin from 

 end of basal cell. 

 n. Eight apical areas to tegmina. 

 o. Head conically produced in front. 



p. Venation of tegmina normal. ...... 



pp. Tegmina with an additional transverse rudimentary vein. 

 00. Head not conically produced in front. . . - . - 



nil. Eleven apical areas to tegmina. ...... 



G-EANA. 



t.vlainga. 

 Graptotettei. 



HlECHYS. 



SciEROPTERA. 



MOGANNIA. 



Gymnotympana. 

 Kamalata. 



RCSTIA. 



Kabenu. 



TiBICEN. 



Emathia. 



CiCADATRA. 



Calcaoxinus. 



Terpnosia. 



Melampsalta. 



Prasia. 

 Lkmbeja.* 



B.ETURIA. 

 ACRILLA. 



' I substitute this name for PerUtoneura, Dist. (Proo. Zool. Soc. 1883, p. 189), a generic title which has been since shown 

 to be preoccupied in Trichoptera by McLachlan (Joxirn. Linn. Soc. Zool. 1871, vol. xi. p. 119). 



