246 LIST OF DIPTERA. 



Anthrax undans, n. s. Nigra, thorace fiavo ciliato fulvoque 

 quinquevittato, scutello, pectore, abdominis ventre fasciisque dor- 

 salibus ferrugineis, abdomine pills albis fasciato, lateribus ru- 

 fescentibus, pedibus ferrugineis, tibiis anticis tarsisque piceis, 

 alis limpidis vitta undante fusca, costa flavo-fusca, vittisque 

 sublimpidis varia. 



Head wanting : chest black, thinly clothed with yellow hairs, 

 and having a thick fringe of the same in front and along the sides 

 above the base of the wings ; it is adorned with five tawny stripes, 

 of which the middle one is shortened in front; scutcheon ferrugi- 

 nous : abdomen black, ferruginous and with a band of ferruginous 

 hairs on the hind border of each segment, which has also a band of 

 white hairs towards its fore border, and is reddish on each side : 

 breast and under-side of abdomen ferruginous and clothed with yel- 

 low hairs : legs ferruginous ; feet and fore shanks piceous : wings 

 colourless, yellowish brown along the fore borders for almost three- 

 fourths of the length ; this colour includes some almost limpid 

 streaks, and descends slightly into the disk of the wing by some of 

 the veins ; the latter join it to a rather darker serpentine mark, 

 which borders the veins nearer to the hind border; wing-ribs and 

 veins ferruginous ; the latter piceous towards the tips ; poisers tawny. 

 Length of the body 7 lines ; of the wings 16 lines. 



Anthrax Alexon, n. s. Ferruginea, capite thoracisque disco piceis, 

 abdomine pilis albis fulvis piceisque vittato, antennis fulvis, pedi- 

 bus ferrugineis, tar sis piceis, alis cinereo-fuscis, apicibus margi- 

 nibusque posticis subcinereis fusco trimaculatis. 



Body ferruginous : head and chest piceous : head thickly co- 

 vered with ferruginous down : eyes very dark red : feelers tawny : 

 chest clothed with tawny hairs : breast with longer pale yellow 

 hairs : scutcheon ferruginous : back of the abdomen clothed with 

 tawny and white hairs, and along the hind borders of the segments 

 with piceous hairs, and thereby banded : under-side rather paler and 

 clothed with white hairs : legs ferruginous ; thighs and shanks 

 clothed with very short pale yellow hairs, and beset with black bris- 

 tles ; feet piceous, clothed beneath with short black bristles : wings 

 brown, which colour passes into brownish gray towards the hind 

 border near the base, and the disks of some of the areolets in the 

 middle of the wing are also gray ; the brown has likewise a very ob- 

 lique branch, which becomes gray and irregular as it approaches 

 the hind border, which, like the tips of the wings, is gray, with the 

 following exceptions ; a brown spot on the first, and somet^*^ ano- 



