LIST OF DIPTEEA. 855 



scales gray, with tawny borders. Length of the body 8 lines ; of the 



wings 18 lines. 



a. Swan River. Presented by Sir. J. Richardson. ' 



Dexia Sabrata, n. s., fem. Albo-viridis, capite piceo, thorace sub- 

 vittato, pectore scutello abdomineque ferrugineis purpureo cyaneo- 

 que micantibns, palpis antennisque nigris, pedibus ferrugineis, 

 tarsis nigris, alis subcinereis. 



Body clothed with black hairs and bristles: head pitchy, 

 adorned with a white covering, thickly clothed beneath with pale 

 yellow shining hairs ; a broad interval on the crown between the 

 eyes ; a pitchy stripe between the eyelets and the feelers, narrowest 

 in its middle course ; a tawny spot at the base of the feelers ; epis- 

 toma tawny, very prominent; sides of the face fringed with bristles 

 for full one-half of the length ; face ferruginous, with a ridge in the 

 middle and a furrow on each side : eyes dark red ; fore part slightly 

 convex, its facets hardly larger than those elsewhere : sucker pitchy, 

 clothed at the tip with tawny hairs ; palpi black, beset with black 

 hairs: feelers black, a little shorter than the face ; third joint linear, 

 rounded at the tip, full thrice the length of the second joint ; bris- 

 tle downy, about twice the length of the third joint : chest dull 

 green, adorned with a white covering, which is indistinctly striped ; 

 sides, hind part, and scutcheon ferruginous, with purple reflections ; 

 hind border of the scutcheon armed with black spines ; breast ferru- 

 ginous, partly bluish purple, and adorned with a white covering : 

 abdomen obcouical, half transparent, furrowed on the back, notched 

 in the tip, ferruginous with bluish green and purple reflections, a 

 little longer and broader than the chest; fore borders of the seg- 

 ments adorned with white lustre ; a black stripe along the middle 

 of the back ; hind border of the third segment armed with black 

 spines; segments beneath successively more and more retracted to- 

 wards the base : legs dark ferruginous, clothed with black hairs and 

 bristles ; feet black ; foot-cushions tawny : wings slightly gray ; a 

 brown spot near the base ; wing-ribs and veins tawny ; veins black 

 towards the tips ; tip cross-vein forming a very slightly obtuse angle 

 with the fourth longitudinal vein, almost imperceptibly curved in- 

 ward till very near the tip, where it is curved outward, joining the 

 border at some distance above the tip of the wing ; lower cross-vein 

 much curved inward near the base, slightly curved outward from 

 thence to the tip ; scales gray, with tawny borders. Length of the 

 body 6 lines ; of the wings 16 lines. 

 a. New Holland. Preseuted by J. Hunter, Esq. 



