Genus Gualteria. 553 



side, long black chaetae projecting forwards from the edge of the 

 eyes ; clypeus, palpi and proboscis black with metallic violet 

 reflections ; antennae black, second and third segments with 

 black scales. 



Thorax shiny black, clothed with spindle-shaped black scales 

 with bronzy reflections, a patch of silvery-white ones in front, 

 two patches on each side of the mesonotum, which extend down 

 the pleurae as two wide transverse bars ; prothoracic lobes black 

 scaled at the base, snowy white at the apex ; the back of the 

 mesonotum with metallic black and violet flat scales, passing on 

 to the scutellum, where they are also large and spatulate, the 

 mid lobe with a few flat white apical ones ; metanotum black. 

 Halteres thick with pale stem and dusky knob ; chaetae of thorax 

 black. 



Abdomen black with metallic violet reflections with basal 

 lateral silver patches, which extend on to the dorsum on some of 

 the apical segments, the apical segment with a basal white 

 band ; the penultimate and antepenultimate segments expanded 

 ventrally. 



Legs deep black with blue and violet reflections, femora of 

 fore and mid legs with two snow-white spots, one apical ; hind 

 femora with basal two-thirds creamy beneath, and a snow-white 

 apex ; fore and mid ungues equal and uniserrate ; hind (?). 



Wings with brown scales, dark along the costa ; fork-cells 

 short ; the first sub-marginal longer and narrower than the 

 second posterior, its base just a little nearer the base of the wing, 



Fig. 253. 

 Wing' of Gualterm osicctldi. 9 . Lutz. 



its stem about half the length of the cell ; stem of the second 

 posterior about three-fourths the length of the cell ; posterior 

 cross-vein longer than the mid and about one and a half times 

 its own length distant from it ; scales very similar to Sfcgomyia. 



Length. — 4*8 to 5 mm. 



Time of capture. — March. 



