136 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXIV 



are armed with very minute spines along their ventral margins, 

 as follows. Cephalic internal 3 and 4, cephalic external 0, median 

 internal 0, median external 3, caudal internal 8 and 10, caudal 

 external 10 and 12. The subgenital plate is rather broadly truncate 

 and sub-bilobate distad. 

 Scambophyllum albomarginatum new species. Plate XII, figure l. 



This species is related to the Sumatran S. sanguineolentum 

 (Westwood). Females before us differ from females of that species 

 in the narrower tegmina, which narrow gradually distad from the 

 median point, with meso-proximal concavity of the costal margin 

 decidely less and in the flattened subsulcate dorsal surface of the 

 cephalic femora. Difference in coloration is shown by the broad 

 white ventral margins of the pronotal lateral lobes and the narrow 

 white costal margins of the tegmina. 



Type: 9 : Labuan, British North Borneo. [Hebard Collection, 



Type no. 805.] 



Vertex represented by a small rounded, subsulcate projection, 

 not extending as far cephalad and a very brief distance above the 

 more narrowly rounded facial fastigium. Pronotum short, disk 

 rounding broadly into lateral lobes, broader than long, with 

 transverse sulci decided, its caudal margin broadly convex and 

 showing faint angulation mesad; lateral lobes with ventral margin 

 weakly oblique and very broadly convex (straight in paratype), 

 caudal margin weakly oblique to the broad and weakly indicated 

 humeral sinus. Tegmina very narrowly elongate-oval, narrowing 

 gradually from the median point to the broadly rounded apex, 

 the costal margin showing a broad and weak concavity meso- 

 proximad; mediastine vein very weak, but as heavy as the more 

 than usually heavy transverse veins; discoidal vein curving to 

 costal margin at end of its proximal three-fifths; median vein 

 straight to costal margin near apex, branching at base of distal 

 curvature of discoidal vein, this branch nearly longitudinal and 

 running to apex; ulnar vein with a proximal branch running to 

 median vein, this branch from that point running parallel to ulnar 

 vein to opposite branch of median vein, there ceasing; the ulnar 

 vein itself running nearly parallel to the median vein and 

 branch. Wings Gryllacroid, parachute -like, not full and thus 

 apparently showing incipient atrophy. Ovipositor strongly re- 

 curved at base, broad, broadly rounded at apex, disk distad sca- 

 brous, dorsal margin in distal portion and ventral margin toward 

 apex with heavy triangular teeth. Subgenital plate triangular 

 with broad truncate apex rounded, chitinous only in narrow mar- 

 ginal portions. Genicular lobes and ventral margins of femora 

 unarmed. Caudal tibiae unspined dorsad, armed distad with a 

 dorso-lateral minute pair of spurs and a median pair of heavier 

 spurs. 



