knowledge of the Homo%>terous Family Cicadidm. 197 



pale ochraceous, with an umber-brown submarginal macular fascia. 

 Head including eyes considerably narrower than base of meso- 

 notum ; lateral margins of pronotum slightly and obscurely angulate ; 

 costal membrane of tegmina much narrower than costal area ; oper- 

 cula with their margins rounded, discally foveate at base, their inner 

 apical angles overlapping; rostrum reaching posterior coxse. 

 Long. excl. tegm. $ 36 millim. Exp. tegm. 112 millim. 



Hab. Madagascar ; " Vallee d'Ambolo " ; Foret de 

 Sakavalana (Alluaud — Paris Mus,). 



Allied to IT. evancscens, Butl., and although very dis- 

 similar in colour, the markings of the tegmina are very 

 similar in pattern. The two species, apart from colour, 

 can be thus identified : 



U. evane.Hcens, £ . U. alluaudi, $ . 



Greatest width of tegmina nearly Greatest width of tegmina little 

 equal to half their length. more than one-third of their 



Rostrum passing anterior mar- length. Rostrum only reach- 



gins of opercula. ing anterior margins of oper- 



cula. 



Pycna natalensis, sp. n. (Plate XI, fig. 4 a, b.) 



Body above ochraceous ; head with two central fascia? to front 

 which are connected at centre, a transverse spot at anterior angles of 

 vertex, and a fascia between eyes, black ; pronotum with a transverse 

 spot on anterior margin, and two oblique lines from near eyes which 

 converge on disk, black ; mesonotum with four short anterior 

 obconical spots, of which the central two are largest, a ceutral 

 lanceolate spot much ampliated at base, two small spots in front of 

 cruciform elevation, and a submarginal fascia on each lateral area, 

 black ; abdomen greyishly-pilose, segmental margins, and two 

 central lines on first and second segments, black ; body beneath and 

 legs ochraceous, femora streaked with piceous ; central sulcation to 

 face and spot between face and eyes black ; tibiae castaneous, the 

 tarsi more or less piceous ; tegmina hyaline, the venation castaneous, 

 costal membrane and area ochraceous ; about basal third creamy 

 opaque, with two hyaline spots in radial area, two in base of both 

 third and fourth ulnar areas, and a long hyaline streak in lower 

 ulnar area ; remaining hyaline area of tegmina with scattered fuscous 

 markings ; wings hyaline, venation ochraceous, about basal half 

 ochraceous, opaque, which is partially margined both outwardly and 

 posteriorly with fuscous. Opercula in male broad, transverse, 

 strongly overlapping at their inner margins, their posterior margins 



