DIPLOSIS PYRIVORA, THE PKAE-GNAT. 139 



nigrescens, tenuiter pallido-cinctutum. Halteres albidi. A.l£e 

 cineiere, hirtse, marginibus longe ciliatis, venisque longitudi- 

 iialibus tertiis abrupte angulatis. Pedes elongati fusci pallida 

 pilosLili. 2 oviducto prselongo. Long. 3 circiter 2, ? 3, mm. 



<y & ? . Head black ; face and occiput with grey reflexions, 

 the latter furnished with a dense patch of yellow hairs of uneven 

 lengths, the longer of which curve forward over the forehead and 

 eyes ; palpi brownish yellow ; antennae in 3 about one-fifth 

 longer than all the rest of tlie insect; j'ellowish brown, consisting 

 of 2 sessile basal joints, and 24 round pedicelled and verticillated 

 ones ; the little globular beads of which they consist are divided 

 from each other by pedicels, which are about the same length as 

 the joints at first, but get gradually slightly longer, as the joints 

 get rather less, towards the end. In the 2 the antennae are about 

 two-thirds of the length of the insect without the oviduct ; they 

 consist of 2 basal joints similar to those of the <? , and of 12 

 small oblong or cylindrical ones connected by very short pedicels. 

 The third (the first from the base) is nearly twice as long as any 

 of the others, and looks as if two joints had been cemented 

 together. The joints are verticillated as in the 3 , but the hairs 

 are shorter and pale in colour, while those in the J are dark. 

 Thorax black, with grey reflexions ; when viewed from before, the 

 hind part looks ash-grey, while the front portion appears divided 

 into three wide black stripes or patches, of which the middle is 

 triangular in shape, with a broad base in front, and tapering to a 

 point behind where it joins the scutellum. The lateral stripes 

 are subquadrate, and cover the whole of the sides in front, but 

 become indistinct behind. These patches are separated from 

 each other by two rows of bright long yellow hairs, which extend 

 from the scutellum and diverge from each other as they stretch 

 forwards, enclosing the central triangular black stripe. In some 

 specimens these hairs seem to be seated upon grey lines. When 

 viewed from behind, the whole thorax looks grey, and the black 

 patches are indistinct, or sometimes appear like grey patches 

 divided by black lines. A long tuft of yellow hairs is placed on 

 each side of the thorax, above and in front of the root of the 

 wings, from which a few hairs are continued in a thin line along 

 the sides above the wings to the scutellum. A smaller tuft is 

 also placed below the root of each wing, and the front margin of 

 the thorax is covered with short yellowish hairs. Scutelkun 



