138 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXIV 



The present appears to be a dully colored species, showing none 

 of the brilliant and striking contrasts found in the other known 

 forms of this extraordinary genus. 



Type : 9 ; Sandakan, British North Borneo. (From C. F. Baker.) 

 [Hebard Collection, Type, no. 806.] 



Agrees with albomarginatum except as follows. Vertex more 

 sulcate, distinctly so. Pronotum slightly longer than broad, with 

 lateral margins of disk defined from lateral lobes by color, though 

 not bjr contour. Tegmina broader, with a strong sub-angular 

 concavity of the costal margin meso-proximad thence narrowing 

 more strongly to the more strongly rounded apex, the sutural mar- 

 gin showing greater convexity, the axis of the distal portion of the 

 tegmen being at a slight angle to the axis of its proximal portion; 

 mediastine and transverse veins much weaker, scarcely visible to 

 the naked eye, principal veins proportionately weaker; discoidal 

 vein curving to costal margin at end of its proximal two-thirds; 

 median vein showing a weak angulation mesad, reaching costal 

 margin near apex, branching at base of distal curvature of disco- 

 idal vein and again distad, its first branch forked dbtad, these 

 branches curving but in large part longitudinal; ulnar vein follow- 

 ing margin of anal field for two -thirds its length, thence longitu - 

 dinal, running straight to sutural margin at base of distal third. 

 Wings with area proportionately slightly less, contour slightly 

 more parachute-like. Caudal tibiae with dorso-distal spurs absent 

 on all but one side of one tibia, (present on all in paratype). 



Allotype : cf ; same data as type. [Hebard Collection.] 



Size decidedly smaller than female. Vertex more distinctly 

 sulcate, the apex of the facial fastigium also sulcate. Pronotal 

 disk as long as broad. Stridulating field of tegmina large, with 

 stridulating vein very short and heavy; concavity of costal margin 

 weaker; distal portion of tegmina tapering much more strongly to 

 the more sharply rounded apex; first branch of median vein not 

 forked. Ultimate tergite broadly and narrowly concave above 

 the rotundato-trigonal supra-anal plate, which is slightly broader 

 than long. Cerci moderately stout, straight, cylindrical, tapering 

 slightly to the apex which is armed with a single sharp tooth, 

 directed inward at slightly less than a right angle to the shaft. 

 Subgenital plate short, simple, transverse, with distal margin 

 convex. 



General coloration greenish yellow, (discolored, probably green 

 in life). Antennae suffused with brown and showing small, widely 

 spaced, buffy annuli. Head with a broad, irregular postocular 

 suffusion of mummy brown, this continued on lateral lobes of 

 pronotum, proximad there extending to near the ventral margin, 

 the dorsal margin of this marking, though not continuous, clearly 

 defining the lateral margins of the pronotal disk. Tegmina with 

 areas between veins of anal field, except meso-distad, prouts 



