248 THE DIPTERA-BRACHYCERA OF TASMANIA, 



The Australian species placed in this genus are not quite 

 homogeneous, and will probably require further sub- 

 divisioi^ ; until, however, further material from different 

 parts of Australia^ is available for comparison, it seems best 

 to leave all the species as they were originally described. 



Tdblt of the T(tsn)fini(ni Sprclcx of S('tapu>i. 



1. Posterior cross-vein angulated in the middle. 2 

 Posterior cross-vein straight or almost so. 4 



2. AVings with three brown bands, that nearest the 



base short, the others long. Trifasciatus, Macq. 



Wings hyaline; legs black. Grandis, Macq. 



Wings hyaline, except that the posterior cros,- 

 vein and the upper branch of the discal vein are 

 suffused with brown ; legs yellow. 3 



o. Antennae orange; scutellum violet; angulation of 

 the posterior cross-vein marked outwardlv bv a 

 distinct veinlet. Brevicornis, Macc|. 



Antennse black ; scutellum green ; angulation of 

 the posterior cross-vein without any outward 

 veinlet. Chalceus, Sp. noiv. 



4. Wings with two brown bands. Discretifasciata, Macq. 



Wings hyaline; legs yellow, with femora green in 

 the maie. Dispar, Macq. 



Wings hyaline; legs black; abdomen densely hairy 

 in the male. NiGTipPiLOSus, Macq. 



SciAPus TRIFASCIATUS, Macq. 



Thorax metallic gicen ; scutellum metallic blue ; abdo- 

 men metallic green, banded with black ; legs yellow ; wings 

 with three brown bands, that nearest the base very short, 

 the others long. 



Length. Male, 5.5-6 mm.; female, 5.5 mm. 



Plao. Generallv distributed. 



iMale. Face usually silvery-grey, but the upper part 

 occasionally metallic green. Front metallic green or grey. 

 AntenucC dark red, with apex of third joint black. Thorax 

 metallic green; scutellum metallic blue. Abdomen metal- 

 lic green, with anterior half or third of each segment 

 })lack, and bearing very long, stiff, and shorter hair-like, 

 black lateral bristles. Legs with femora and tibiae dull 

 vellow, tarsi, and also sometimes apex of tibiae, black ; the 

 tibiae bear a few short black bristles. Wings with the pos- 

 terior cross-vein angulated in the middle, the angulation 

 being marked outwardly by a small veinlet, and bearing 



