1922] NATURAL SCIENCES OF PHILADELPHIA 215 



Coloration very similar to that of malaya, except that the shade 

 is different and the dark dorsal portions are in much stronger 

 contrast. General coloration buckthorn brown, faintly mottled. 

 Dorsal surface of vertex, occiput, pronotum and anal field of teg- 

 mina contrastingly and solidly warm sepia, narrowly bordered 

 laterad with buffy, though more broadly so than in malaya. 

 Other markings as in that species except that the tegmina have 

 more numerous clouded areolae, with a few flecks of darker brown, 

 particularly along the sutural margin. 



Length of body 23.5, length of pronotum 6.8, cephalic width of 

 pronotal disk 2.2, caudal width of pronotal disk 4.2, depth of 

 lateral lobes of pronotum 4.8, median width of lateral lobes of 

 pronotum 4.1, length of tegmen 36.3, median width of tegmen 6.5, 

 greatest (distal) width of tegmen 7.6, length of cephalic femur 

 6.2, length of caudal femur 15, length of ovipositor 10.1 mm. 



The type is unique. 



Oxystethus dyaka new species. Plate XVII, figure 18. 



Related to the Bornean 0. geniculatus Bolivar, the present 

 female is distinguishable from the single male known of that species 

 by its more simple coloration with less developed color pattern, 

 particularly of the head and pronotum, and the tegmina and wings 

 which, though fully developed, are decidedly shorter in proportion 

 to the body bulk. 



The general appearance of the present insect strongly suggests 

 that of certain species of the Neotropical genus Agraecia. 



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



Baker.) [Hebard Collection, Type no. 835.] 



Size medium for the genus; form rather slender, much more 

 slender than in some of the species. Vertex slenderly produced in 

 a conical fastigium which is scarcely longer than the first antennal 

 joint, moderately ascendant to its sharply rounded apex. An- 

 tennae extremely elongate. Face thickly and heavily impresso- 

 punctate, this weaker on the genae. Pronotum elongate, surface 

 thickly and heavily impresso-punctate; dorsum rounded into 

 lateral lobes but with a few, small, smooth, impressed areas on 

 each side, shoulders indicated only latero-caudad and weakly 

 rounded; caudal margin of disk transverse, faintly sinuate and 

 subemarginate; transverse sulci indicated only dorsad on lateral 

 lobes, the latter decidedly longer than deep, with ventro-caudal 

 portion strongly and roundly produced ventro-caudad, so that the 

 ventral margin is broadly obtuse-angulate emarginate and declivent 

 to that portion, humeral sinus decided. Tegmina and wings fully 

 developed, extending slightly beyond apex of ovipositor. Tegmina 

 narrow, straight, tapering very slightly to the evenly rounded apex; 

 median vein branching mesad, this branch having two and three 

 short, oblique distal branches. Mesosternum with a long, slender 



