600 LIST OF DIPTERA. 



Merodon Bautias, n. s., mas. et fern. Niger, pilis fulvis vestitus, 

 abdominis lateribus nigro-pilosis, antennis pedibusque nigris, 

 tarsis fulvis, alis cinereis ad costam subfuscis. 



Allied to Imatisma posticata, Macq. Dipt. Exot. ii. 68, I, pi. 

 12, /. 2. Eristalis posticatus, Fabr. Syst. AntL 237, 21. Wied. 

 Auss. Zweif. ii. 194, 62. Body broad, thick, black : head shining, 

 clothed with pale tawny hairs, not so broad as the chest ; clypeus 

 large: mouth and feelers black; bristle tawny: eyes black ; facets 

 small, those on the fore part of the crown rather larger: chest 

 thickly clothed with pale tawny hairs: abdomen black, obconical, 

 very shining, clothed with black hairs on each side, covered with 

 dark ferruginous bloom, a little longer and narrower than the chest : 

 legs black, clothed with black hairs ; feet tawny beneath towards 

 the tips ; claws and foot-cushions tawny ; tips of claws black ; hind 

 thighs toothed, remarkably thick ; hind shanks curved, broad, toothed 

 beneath : wings slightly gray, tinged with brown along the fore bor- 

 der, in whose middle there is a small dark brown spot; wing-ribs 

 pitchy ; veins black, pitchy towards the base ; poisers tawny. 

 Length of the body 6i — 8 lines ; of the wings 13 — 16 lines. 



a. Georgia. From Mr. Abbot's collection. 



Merodon Balanus, n. s. Niger, pilis fulvis hirtus, scutello ferru- 

 gineo, abdomine basi pilis ferrugineis apice subtusque pilis 

 nigris hirtq, antennis piceis, pedibus nigris, tibiis piceis, tarsis 

 ferrugineis, alis subcinereis. 



Body black : head clothed with black hairs, narrower than the 

 chest : mouth black : feelers pitchy ; bristle tawny : eyes bronzed ; 

 facets on the fore part of the crown rather larger than elsewhere : 

 chest and breast thickly clothed with bright tawny hairs ; scutcheon 

 ferruginous : abdomen slightly decreasing in breadth from the base 

 to the tip, a little longer and broader than the chest, clothed from 

 the base to near the middle with ferruginous hairs, and with black 

 hairs from thence to the tip and on the whole of the underside ; 

 legs black, clothed with black and tawny hairs ; shanks pitchy : 

 knees and feet ferruginous ; foot-cushions tawny ; claws black, fer- 

 ruginous at the base ; hind thighs and hind shanks thick, the latter 

 slightly curved : wings slightly tinged with gray ; wing-ribs, veins, 

 and poisers pitchy. Length of the body 7 lines ; of the wings 

 15 lines. 



a. New York. Presented by E. Doubleday, Esq. 



