132 The Philippine Journal of Science isit 



rectangle than that of a trapezium. Occiput little convex and 

 the neck short, the head, therefore, being close to the thorax. 

 Frons broad, slightly concave, placed in the same line with the 

 face, lower than the eyes ; the ocelli disposed in a small triangle, 

 being very close together, and placed on the middle of the vertical 

 keel, almost at equal distances from neck and from face of 

 antennae. 



Eyes bare, rather small, twice as high as broad. Face a 

 little shorter than the frons, but considerably broader, the eyes 

 showing a prominent angle inward on the line of the antennae; 

 face concave, not at all prominent even at mouth border, and on 

 the sides produced into a short point below the under corner 

 of eyes. Lunula linear, concealed. Antennae very short, close 

 together at base, inserted at middle of eyes, directed outward, 

 the third joint almost circular and as long as the second; second 

 with a bristle above at end; arista basal, long, thin, microsco- 

 pically pubescent. Antennal furrows horizontal, directed out- 

 ward, placed just below the dividing line between frons and 

 face, and parallel with this line. Oral opening retreating, con- 

 cealed behind the straight edge of mouth ; prselabrum not visible ; 

 proboscis proportionally small ; palpi dilated at end. Chaetotaxy 

 of head reduced to a single pair of vertical bristles, placed out- 

 ward, near the eyes. 



Thorax short, subquadrate, slightly convex; suture slightly 

 caudad of middle, broadly interrupted ; humeral calli prominent ; 

 pleurae regularly convex. Thoracic chaetotaxy not well distin- 

 guishable in the type, only the anterior supra-alar being distinct, 

 but rather thin. Scutellum of great size, as long as broad at 

 base, flat, simple, with two pairs of bristles near the end. Meso- 

 phragma small, less convex, subquadrate. Squamae rudimen- 

 tary ; halteres with a large knob. Abdomen short, narrower than 

 thorax, and a little constricted toward the base; hypopygium 

 ventral, of medium size. Legs of proportional size, simple; 

 middle tibiae without distinct apical spur. 



Wings of great size, rather obtuse at end, hyaline, with black 

 spots formed by rounded chitinous tubercles, and besides with 

 a long strong spine (Plate I, fig. 2a) on lower surface in the 

 second posterior cell. Veins bare ; auxiliary vein very thin and 

 less distinct; second longitudinal vein long, third and fourth 

 rather sinuous, fifth very short, sixth wholly wanting; second 

 basal and anal cells very narrow, narrowed to the base and 

 almost indistinct. 



It is possible that the peculiar chitinous black calli of the 



