from the PMlippine Islands. 239 



in a sufficient number of tolerably well preserved specimens, and, at 

 the same time, indicate the points in which the other species differs 

 from it. 



Head, seen in profile, nearly square, as the front is almost ho- 

 rizontal and the face nearly perpendicular; both project considerably 

 in front of the eyes, (see Jaennicke, 1. c. Tab. I, f. 14a). Front 

 very slightly convex, clothed with a microscopic, nearly appressed pu- 

 bescence, but without any bristles; on the vertex two stout, but ra- 

 ther short vertical bristles each side near the upper corner of the eye; 

 the inner pair converging, the outer diverging. Eyes nearly round, 

 glabrous, comparatively small, the face under them being nearly equal 

 in length to the diameter of the eye. Antennae small, distant at 

 their bases, inserted immediately under the frontal fissure and somewhat 

 appressed to the face in a distinct depression; a couple of exceedingly 

 small bristles near the tip of the second joint; third joint semi-elliptical, 

 finely pubescent; arista plumose on the upper side. The facialia 

 (Stenhammar's epistomatis partes laterales) on each side of the 

 face, between the antennae and the cheeks, are perfectly glabrous, the 

 face likewise. Oral opening large, clypeus retracted, proboscis 

 rather stout, palpi slender, very slightly stouter towards the end. 



Thorax very gently convex, nearly glabrous; on the thoracic 

 dorsum only four bristles each side; a posthumeral in front of the 

 thoracic suture, in the angle between it and the dorso-pleural suture; 

 and three supra-alar in their normal positions ; on the pleurae, a single 

 mesopleural bristle and a sterno-pleural; the latter about midway be- 

 tween the root of the wing and the middle coxa. 



Scutellum rather large, flat, projecting horizontally, in the shape 

 of a truncate triangle; four bristles on the edge. Abdomen very 

 gently convex, uniformly clothed with microscopic, semi-appressed hairs 

 (like those on the front); in the male, five apparent segments; segments 

 6-8, short and narrow, are generally withdrawn. 



Legs comparatively long; basal joint of front tarsi of the male 

 distinctly incrassated; more slender in the female; on the middle tibiae, 

 besides the ordinary pair of spurs and the other bristles at the tip, 

 there is, on the upper side, a short bristle not far from the base, a 

 second a little beyond it, and a third a little before the tip. The hind 

 femora have (in both sexes) a row of short, erect spines on the distal 

 half of the underside. Pulvilli very small: ungues curved. (The 

 ,,Hinterschienen leicht gebogen" of Jaennicke does not apply to D. 

 digna; the tibiae are straight). 



Wings rather long; costal vein reaching as far as the fourth vein ; 

 no costal spine; posterior crossvein very oblique, sinuate, approximate 

 to the alar margin; second basal and anal cells obliterate. 



