knowledge of the Homopterous Family Cicadidte. 195 



reaching the anterior margin nor extending to the posterior marginal 

 area, black ; mesonotum with two short obconical spots on anterior 

 margin, a discal triangular spot and a transverse series of four small 

 spots across posterior area, black ; a long, pale castaneous obconical 

 spot on each lateral area which contains two small black spots at its 

 base and one at its apex ; abdomen above black, with a central basal 

 longitudinal ochraceous area, and the segmental margins more or less 

 greyishly pilose ; body beneath and legs greenish-ochraceous, the 

 sternum greyishly tomentose, the opercula palely piceous and 

 greyishly tomentose, their margins dull ochraceous ; tegmina brown- 

 isb-ochraceous, costal membrane and area more or less greenish, radial 

 area with three pale spots, some obscure paler spots and mottlings 

 in ulnar and apical areas and alternate darker and paler outer 

 marginal spots ; wings pale umber-brown, basal third blackish - 

 castaneous, a streak of the same colour both in and beneath radial 

 area, and much paler castaneous longitudinal rays between the veins 

 on the apical area, extreme outer margin also pale castaneous ; body 

 short, broad, and robust • head including eyes as wide as base of meso- 

 notum ; lateral margins of pronotum angularly ampliate ; abdomen 

 about as long as space between apex of head and base of cruciform 

 elevation ; costal membrane of tegmina a little wider than costal 

 area ; rostrum extending to posterior coxa? ; opercula somewhat large, 

 their inner apical areas overlapping, their posterior margins slightly 

 convexly rounded, and their disks strongly foveately impressed. 

 Long. excl. tegm. £ 38-40 millim. Exp. tegm. 113 millim. 



Hab. Madagascar; Baie d'Antongil (Mocouerys — Paris 

 Mus.). 



I have named this species after Prof. A. Bouvier, " Fon- 

 clateur et Conservateur " of the Paris Museum, from whom 

 I have received much valued entomological assistance at 

 various times. 



Yanga grandidieri, sp. n. (Plate XI, fig. 3 a, b.) 



(£ . Head, pronotum, and mesonotum green; head with margins of 

 front, a spot behind anterior angles of vertex, the area of the ocelli 

 and a spot at inner margin of eyes, black ; pronotum with the 

 incisures and two small central spots in front of posterior margin, 

 black ; mesonotum with a spot in front of cruciform elevation and a 

 transverse series of four spots behind it, black ; abdomen piceous, a 

 central longitudinal basal area, the tympanal coverings and posterior 

 segmental margins pale ochraceous ; body beneath and legs pale 

 greenish or inclining to ochraceous ; tegmina green, much suffused 

 with bronzy-green, the costal area and membrane pale green, the first 



