Pipizella. 63 



below at base ; arista scarcely as long as the antennæ, thickened in about 

 the basal half. Thorax æneous black, densely punctate, clothed with 

 long, yellowish hairs, longest on scutellum. Pleura likewise with yellowish 

 hairs. Abdoraen black, a little æneous, almost not punctate; it is dull, 

 only shining at the side margin, the side elevations on the third seg- 

 ment and at the posterior half of fourth segment; the disc is clothed 

 with short hairs, black at the sutures, for the rest pale, but the black 

 hairs predominant; the margin has long, pale hairs, longest at the 

 base. Venter blackish, a little translucent at the base, with long, pale 

 hairs on second segment, short hairs on the others. Genitalia large, 

 shining, reaching long in under the venter and the apex here ferrugin- 

 ous. Legs black, knees yellow, hind knees only narrowly; the middle 

 metatarsus somewhat indistinctly yellowish on the basal part; hind 



Fig. 15. Wing of P. Heringi d". (From a German specimen). 



metatarsus a little thickened. The legs haired as usual, yellowish on 

 the posterior femora, dark on front femora; anterior tibiæ mainly 

 pale-haired, the conspicuous fringe above the hind tibiæ black; the 

 adpressed pubescence pale below the tarsi, dark above. Wings very 

 slightly tinged; stigma brownish yellow; mediastinal vein ending a 

 little after the medial cross-vein; the upper marginal cross-vein starting 

 rectangularly, after the first third part bending angularly outwards 

 parallel with the margin, the upper angle acute. Squanmlæ smoky or 

 pale brownish, with a darker margin and a pale brownish fringe. 

 Halteres with the knob brownish. 



Female. Frons æneous or often bluish black, fmely punctate, 

 with a groove above the antennæ, and with a slight transverse depres- 

 sion, bordered above by a line with a triangular outskot in the middle; 

 it is whitish-haired, above the antennæ and just in front of the ocelli 

 some dark hairs; distinct side dust spots present. Occiput puffed out 

 and shining above, the white postocular hairs more conspicuous than 

 in the male; at the sides upwards some black hairs. Antennæ longer 

 than in the male, the third joint twice as long as broad. Thorax 

 with shorter and whiter hairs. Abdomen sometimes quite white-haired, 



