992 LIST OF DIPTERA. 



oblique ; lower cross-vein very slightly curved inward ; scales rudi- 

 mentary ; poisers yellow. Length of the body 2 lines ; of the 

 wings 4 lines. 

 a. West Australia. From Mr. Clifton's collection. 



Oetalis Massyla, n. s., fem. Viridis, ccpite ferrugineo, abdominis 

 segmento 5° purpureo apice fulvo, palpis ferrugineis, antennis 

 pedibusque nigris, tar sis fulvis, alls albisfusco trifasciatis. 



Body metallic-green, slender, clothed with short black hairs : 

 head and chest beset with black bristles : head ferruginous above 

 and along the borders of the eyes ; epistoma ferruginous, prominent: 

 eyes red ; fore part slightly convex ; its facets a little larger than 

 those elsewhere : sucker black, clothed with tawny hairs ; palpi fer- 

 ruginous, beset with black bristles : feelers black, much shorter than 

 the face ; third joint conical, ferruginous at the base, much longer 

 than the second ; bristle bare,' very slender, more than thrice the 

 length of the third joint : abdomen long-obconical, much longer 

 than the chest, tapering, flat, and with a rim on each side towards 

 the tip, which is tawny ; fifth segment dark purple : legs black, 

 clothed with short black hairs ; knees ferruginous ; feet and tips of 

 shanks dull tawny : wings white, with three dark brown bands ; the 

 first extends nearly to the hind border, and joins the side of the 

 middle cross-vein ; the second reaches the hind border and encloses 

 the lower cross-vein ; it is darkest on the fore border, and there 

 unites with the third, which widens along the fore border and occu- 

 pies the whole of the tip of the wing ; wing-ribs, veins, and poisers 

 tawny ; veins pitchy in the brown parts of the wings ; lower cross- 

 vein nearly straight. Length of the body If — 2 lines ; of the wings 

 3 — 4 lines. 



a. North America. Presented by the Entomological Club. 



Ortalis Otroeda, n. s., mas. Cyaneo -viridis, palpis nigris, pedibus 

 nigro-cyaneis, tibiis piceis, tarsis fulvis, alis limpidis fusco qua- 

 drimaculatis. 



Body bluish green, metallic, clothed with short black hairs : 

 eyes red ; fore part flat, composed of larger facets than those else- 

 where : sucker and palpi black, clothed with short black hairs : ab- 

 domen obconical, hardly longer than the chest: legs bluish black, 

 clothed with short black hairs ; knees ferruginous ; shanks pitchy ; 

 feet dark tawny, with black tips : wings colourless, adorned with 

 four brown marks along the fore border ; the first proceeds for a 

 short space along the fore border, and descends obliquely into 



