312 Transactions. 



Subfamily MILESIINAE. 



Vein R4 + 5 moderately or slightly curved into cell R 5 ; cross-vein r-m 

 at or beyond the middleof cell 1st M 2 . 



Genus Xylota Meigen (1822). 



The chief characters by which the following species is placed in this 

 genus are: vein R 4 + 5 moderately curved into cell R 5 ; cross-vein r-m 

 near middle of cell 1st M 2 ; face deeply dished beneath antennae ; eyes 

 bare ; posterior femora broad and spinose beneath ; body immaculate. 



X. montana n. sj>. (Plate XLIX, fig. 2.) 



A robust medium-sized fly, blackish in colour and with no colour- 

 pattern. It has some resemblance to Lepiclomyia decessum. 



Eyes bare, dichoptic in both sexes, but those of the male more approxi- 

 mated ; ocelli orange-red ; front and vertex shiny black with a silvery 

 reflection due to pubescence and clothed with strong and rigid black hairs ; 

 frontal lunule brownish. Antennae black with a greyish tomentum ; 3rd 

 joint somewhat lighter in colour and more or less circular ; arista black. 

 Eace deeply dished beneath antennae (fig. 48), being abruptly produced 

 before descending almost vertically to the rather descending anterior oral 

 margin, above which there is a slight prominence ; face diagonally furrowed 

 on each side, blue-black in colour but brownish to greyish pruinose above 

 furrows ; sparsely clothed above and on each side of produced portion 

 with silvery hairs ; lower facial orbits with erect greyish hairs ; cheeks 

 black with a silvery reflection particularly along the orbits, and clothed 

 with whitish to brown hairs ; occiput shiny blue-black with white hairs 

 and greyish reflections ; mouth-parts blue-black. 



Fig. 3. — Xylota montana n. sp. : wing. 



Thorax blue-black with indistinct stripes and a coppery reflection on 

 the dorsum ; sparsely clothed with delicate brownish and whitish hairs ; 

 humeri, margins of dorsum and alar regions greyish-pruinose in some 

 lights ; pleurae deep-blue and dull-greyish pruinose, the meso- and ptero- 

 pleurae with a tuft of white hairs at their upper posterior angles ; sterno- 

 pleurae clothed with short black hairs ; scutellum with long delicate greyish 

 hairs. Wings (fig. 3) clear, stigma almost colourless, veins brownish- 

 black ; vein R 4 + 5 moderately bent into cell R 5 ; cross-vein r-m at the 

 middle of cell 1st M 2 ; squamae and anti-squamae translucent, the former 

 fringed with greyish branched hairs, the latter with short simple ones ; 

 halteres brownish with darker heads. Legs shiny blue-black ; femora 

 clothed with scattered greyish hairs, the posterior pair broadened and 

 spinose beneath on distal half (fig. 55), there being a double row of short 

 stout spines, weakening proximally, along the middle, and larger bristles 



