frotm the Philippine Islands. 117 



on the first segment a small transverse black spot on each side; on 

 the posterior portion of the second and third a transverse black stripe 

 attenuated on each side and reaching the lateral margin, expanded in 

 the middle in the shape of an obtuse triangle; a black spot or spots, 

 representing a vestige of a similar stripe, on the fourth segment; the 

 large male hypopygium yellowish-red. Legs yellowish-red; hind femora 

 strongly incrassate, brown at tip; hind tibiae strong, arcuate, brown, 

 yellow at base, and with an obsolete yellowish ring in the middle ; hind 

 tarsi brownish at tip. Wings with a yellowish tinge. — A single male. 

 NB. The straight silvery face of this species, neither excavated 

 under the antennae, nor gibbous above the mouth, will render it 

 easily recognizable. 



Graptomyza. 



This genus was established by Wiedemann (Nov. Dipt. Gen. 1820; 

 and A. Z. II, 206) for G. longirostris and brevirostris from Java. 

 It is allied to Volucella; it has the same characteristic conical pro- 

 longation of the face, with a distinct notch at the tip. The principal 

 differences are: the structure of the head, the eyes being separated by 

 a broad front in both sexes, and the venation. The latter resembles 

 that of Ascia and Microdon in the rectangular curvature of the ends 

 of the fourth and fifth veins; the second vein ends in the costa and 

 not in the first vein; the so-called spurious vein is often absent (es- 

 pecially in the group with a subglabrous arista); sometimes feebly 

 marked. The scutellura shows a characteristic concavity in the middle 

 of the disc. The abdomen is convex, in some species remarkably gib- 

 bous; the dorsal plates, on the sides, are more or less curved under 

 the abdomen, as in Volucella; but the ventral plates are much smaller 

 than in that genus, the large intervals on both sides being occupied 

 by the connecting membrane, (not unlike Calliphora). In the species 

 of the group of (jr. ventralis the abdominal dorsal incisures are very 

 little perceptible, so that the segments seem to be soldered together; 

 this is much less the case in the group of the smaller species. 



The antennae have the first joint very short; the second but little 

 longer (like the antennae of Rhingia and Volucella); the third joint 

 is many times longer than the two first taken together, more or less 

 linear in shape; the upper side in some species is distinctly concave 

 in its outline, the lower one showing a corresponding curvature (see 

 J. Proc. Lin. Soc. I, Tab. VI, f. 4c, the antennae of G. inclusa Wk,). 

 The arista, inserted more or less near the base of the third joint, is 

 either distinctly plumose, or microscopically pubescent; whether it is 

 absolutely glabrous in some species (it is represented so in 6r. inclusa) 

 I have not ascertained. 



