PLATYLOMIA. 103 



central and longitudinal, two short and angulated, the outer two 

 longer, irregular and angularly curved) and two spots in front of 

 cruciform elevation black ; abdomen above with some central 

 black discal spots ; body beneath, sternum, legs, and opercula 

 ochraceous or greenish -ochraceous ; apices of anterior femora, 

 bases and apices of anterior and intermediate tibife, bases of 

 posterior tibiae, and anterior and intermediate tarsi black ; 

 tegmiua and wings hyaline, the venation ochraceous or greenish, 

 in some places black. 



Length excl. tegm., d" , 32 to 38 ; exp. tegm. 84 to 100 millim. 



Hah. Bombay (Leith). Nilgiri Hills ; Koonor {ffamj^son). 

 Ceylon (Green). 



This is the species figured by Tennent in his ' Xatui'al History 

 of Ceylon,' and referred to by him as "The Knife-grinder." He 

 describes it as resting high up on the bark of a tree, and making 

 the forest re-echo with a long-sustained noise so cui'iously 

 resembling that of a cutler's wheel that the creature producing it 

 has acquired the highly appropriate name of the " Knife-grinder." 



Opercula in male reaching base of last abdominal segment ; 

 tegmina unspotted. 



1592. Platylomia nagarasingna, Bist. (Duudubia) Tr. E. S. 1881, 



p. 635; yl/A-i»,s. ( Diuidubia) J. A. S. Beng. liii, p. 225 (1885) ; 

 Dist. (Cosmopsaltria) Mon. Orient. Cicad. p. 44, t. iv, f. 14, a, b 



(1889). 



Body above castaneous ; head with centre of front and an 

 oblique fascia on each side of ocelli ochraceous ; pronotum with 

 a central fascia and the lateral and posterior margins ochx'aceous ; 

 mesonotum with two anterior, central, black-margined obeonical 

 spots, basal cruciform elevation ochraceous ; abdomen more or less 

 greyishly pilose, with a lateral fascia of greyish pile on each side, 

 the apex greyishly tomentose ; body beneath and legs pale 

 ochraceous, more or less greyishly tomentose ; anterior tibiae, 

 apices of intermediate and posterior tibiae, the tarsi, and apex of 

 rostrum piceous ; tegmina and wings hyaline, the venation 

 ochraceous or fuscous ; tegmina with the costal membrane 

 ochraceous; rostrum reaching apex of posterior coxae. 



Length excl. tegm. 34 to 38 ; exp. tegm.. 88 to 95 milhm. 



Hah. Burma {Bingham). Tenasserim ; Mj'itta (Dohertg). — 

 Cochin China. 



B. Operc^da in male with their apiices obtusely angidate. 

 Opercula reacliing fourth abdominal segment ; tegmina spotted. 



1593. Platylomia umbrata, Bist. (Cosmopsaltria) A. M. N. H. (6) 



i, p. 293 (1888); id. Man. Onent. Cicad. p. 58, t. v, f. 11, a, b 

 (1890). 



Head and thorax above obscure olivaceous ; head with the 



