■2(J7 



curved, slightly flattened, with the inner corner of apex slightly pro- 

 duced and rounded at apex. 



Length 2.3mm. ; tegmen 3.4mm. 



Hill*. ]\ro\vong, Borneo. 



(hii 111(1 fissius Fieber. 

 (1) 0. lofouensis sp. nov. (S 9 ) 



This species differs from hinotatus in the vertex narrowing 

 slightly more towards the apex and the face towards the base, the 

 medio-apical portion of clypeus raised as a short, angular keel. 

 Median ocellus absent, clypeus rounded at base, keelless. Subcosta 

 and radia amalgamated to near apex where three small apical veins 

 arise, media simple with one sector arising a little before the 

 branching of radia from subcosta, cubitus forking slightly before first 

 median sector, claval vein joining commissural margin very near apex 

 of clavus. 



Dirty yellow or light brown; eyes dark brown, keels slightly 

 lighter, abdomen darker, a dark fuscous spot on each side of pro- 

 notum as in hinotatus, a dark patch at base of face, basal half of cly- 

 peus dark; tegmina and wings hyaline, veins brown. Male pygophor 

 slightly compressed, ventral and lateral edges subtruncate; anal seg- 

 ment less than half the length of genital styles, slightly narrowed to 

 the broadly rounded apex, anus about middle; styles large, sub- 

 angular, length greater than width at base, apex slightly rounded. 



Length 2.0mm. ; tegmen 3.2mm. 



Hab. Lo-fou Mountains, South China ; 3500 feet elevation, 

 on grasses. 



(2) 0. chinsanensis sp. nov. 



This species is in form and color like hifditcn-sis, but the genitalia 

 differs; the anal tube is short, not reaching to end of genital styles; 

 genital styles nearly circular, with a small indentation on the dorsal 

 edge. This appears to be near to O. hinotatus, but the styles are much 

 larger in proportion to the anal segment. 



Lengtli 2.5mm. ; tegmen 3mm. 



Hab. Chin san, China (near Macao.) 



Ncommatissus gen. nov. 

 Type spurcus. 



Head narrower than thorax; vertex longer than wide, deeply 

 excavate so that the apex and sides stand up as deep, laminate keels, 

 especially above the eyes, base slightly emarginate, with a very small 

 keel; face much longer than wide, sides subparallel, slightly widening 

 at apex, tricarinate, the median carina continued down middle of 



