1883.] MR. W. L. DISTANT ON THE CICADID^. 189 



ochraceous ; opercula reaching the third abdominal segment, slender, 

 concavely constricted on each side near base, and then again convexly 

 widened to apex, which is rounded ; rostrum about reaching posterior 

 coxae, with its apex narrowly fuscous. Tegmina and wings pale 

 hyaline ; veins and costal membrane of tegmina ochraceous. 



Long. 30 millim. ; exp. tegm. 73 millim. 



Had. Java. (Cell. Dist.) 



This species is alHed to D. nifivena, Walk., from which it differs 

 in its larger and more robust body and much more slender opercula, 

 which in D. rofflesH are not perceptibly broader at the apex than at 

 the base, which is quite the reverse of what obtains in B. rujivena. 



CosM opsALTRiA MEYERi, n. sp. (Plate XXV. figs. 2, 2«, 26.) 

 Body above castaneous. Head with the vertex and front nearly 

 completely suffused with blackish ; ocelli and eyes yellowish. Pro- 

 notum with a central black longitudinal fascia, the posterior and 

 lateral margins obscure ochraceous. Mesonotum with two large 

 contiguous black obconical spots on anterior margin, a large, lateral, 

 subconical black fascia on each side, and a triangular black fascia in 

 front of cruciform elevation, the apex of which is produced between 

 the central obconical spots, and which also possesses posteriorly a 

 central and angulated base. Abdomen very dark castaneous. Body 

 beneath and legs dark castaneous ; sternum and base of abdomeu 

 thickly and palely pilose ; opercula ochraceous, extending to about 

 base of fourth abdominal segment, concavely constricted beyond 

 base, and then slightly and convexly rounded to apex, apical portion 

 distinctly narrower than base (rostrum mutilated). Tegmina and 

 wings pale hyaline ; the first slightly infuscated, with the costal 

 membrane, basal area, and veins brownish or fuscous, transverse veins 

 at bases of second and third apical areas infuscated, and two small 

 submarginal fuscous spots at apices of veins enclosing first and 

 second apical areas ; wings with anterior claval margin and a basal 

 streak pale fuscous. 



The face is very convexly tuTnid, wna a ithrrow central discal 

 sulcation, transverse striations becoming more profound from base 

 to apex ; the anterior femora are armed with two strong spines, one 

 near base and one near apex ; between the last aud apex is a small 

 and somewhat rudimentary spine. 



Long. 50 millim. ; exp. tegm. 132 millim. 

 Hab. Celebes {A. B. Meyer). (Mus. Dresden.) 

 This species is allied to C. spinosa, Fabr., from which it differs 

 in its different markings both of body and tegmina, the longer and 

 differently shaped opercula, &c. 



Perissonexjra, n. gen. 



$ . Head triangular, the front prominently and subacutely pro- 

 duced ; the vertex with the lateral margins slightly convex behind 

 the eyes and prominently produced in front of the eyes. Pronotum 

 at posterior angles about twice as broad as anterior margin, the 

 posterior angles ampliated, deflexed to base of tegmiua, and broadly 



