tieic Oriental ilomopleni. 401 



apical veins to the first and second ulnar areas and the apices 

 to the longitudinal veins to the apical areas slightly infus- 

 cated; tympanal coverings narrower but scarcely shorter 

 than tympanal cavities; lateral margins of the pronotum 

 moderately ampliate and sinuate, distinctly but obtusely 

 biangulate ; opercula in male short, about reaching the 

 anterior margin of the second abdominal segment, the outer 

 margins sinuate and obliquely directed inwardly, the apices 

 narrowly rounded, the inner margins widely separated. 



Long., excl. tegm., c? ^^ n\m. ; exp. tegra. 102 mm. 



Hah. Cochin China (Brit. Mus.). 



The largest species of the genus at present described. 



OnOMACRITUS, gen. no v. 



Head transverse, much shorter than the breadth between 

 eyes, eyes large and upwardly prominent, as seen beneath 

 distinctly exserted, lateral margins of veitex and front 

 almost continuous ; face broad, narrowing to clypeus, an 

 obscure central tubercle near anterior margin, clypeus 

 strongly centrally ridged, only a little shorter than face; 

 pronotum considerably longer than head, a little shorter than 

 niesonotum, the lateral margins a little ampliate, concavely 

 sinuate before the lateral angles, which are roundly promi- 

 nent and a little upturned, slightly and obscurely angulate 

 before the concave sinuation ; abdomen much longer than 

 space between apex of head and base of cruciform elevation, 

 t}'mpanal coverings narrower but scarcely shorter than 

 tympanal cavities ; rostrum passing the base of abdomen ; 

 opercula in male small and transverse, widely separated 

 internally ; tegminia elongate, narrow, more than three 

 times as long as broad ; wings only half as long as tegmina, 

 but nearly as broad, six apical areas, their basal margins 

 almost at right angles with each other. 



Allied to Tettiffia, but differing in the short transverse 

 head, the elongate and narrow tegmina, &c. 



Onomacritus sumatranus, sp. n. 



Body above dull ochraceous, thickly, shortly, greyishly 

 pilose ; area of the ocelli, a small central spot at base of 

 pronotum and a smaller spot in front of and on each side of 

 same, black ; mesonotum with the margins of two small 

 anterior obconical spots and a large spot occupying the 

 posterior halves of the lateral areas castaneous, a central 

 discal line and a small spot in front of each anterior angle of 

 the basal cruciform elevation black ; head beneath, sternum. 



