DIPTERA, : 345 
linear; epistoma pale yellow, slightly prominent ; facialia beset with bristles 
on each side of the peristoma and of the epistoma and along half the 
length of the face; lateralia ferruginous: mouth ferruginous, black towards 
the base; palpi tawny : feelers black; second joint ferruginous at the tip ; 
third linear, with a hoary covering, ferruginous at the base, slightly rounded 
at the tip, full thrice the length of the second ; fourth and fifth distinct ; 
siwth black, very slender, feathered to the tip with very short hairs, ferrugi- 
nous and stout towards the base: chest with four black stripes : abdomen 
obeonical, not longer than the chest, with hoary reflections: legs black ; 
hips and knees ferruginous ; thighs and shanks with a hoary tinge; shanks 
pitehy beneath : wings gray, dark brown along the fore border from one-third 
of the breadth to four-fifths of the length; veins pitchy, tawny at the base, 
bordered with pale brown ; prebrachial vein forming a very obtuse angle 
at its flexure, hardly inclined inward from thence to its tip, approaching 
very near the tip of the cubital vein; lower cross-yein with a distinct in- 
ward curve: alulw gray, with pitchy borders: halteres tawny. Length of 
the body 34 lines ; of the wings 84 lines. 
South America. 
Musca pETERMINATA, Fem. 
Cana; caput album ; thorax nigro quadrivittatus ; abdomen cinereum, 
basi fulvo bimaculatum ; antenne et pedes nigra; ale subcineree, 
basi subfulve. 
Black, with a hoary covering : head with a white covering ; frontalia 
broad, black, narrower towards the feelers: eyes bare: palpi and feelers 
black: chest with four black stripes: abdomen cinereous, with a large tawny 
spot on each side at the base: legs black: wings slightly gray, with a tawny 
tinge at the base ; prebrachial vein forming a very obtuse angle at its 
flexure, very slightly bent inward from thence to the tip ; lower cross-vein 
almost straight: alule whitish, with pale yellow borders: halteres tawny. 
Length of the body 24 lines; of the wings 5 lines. 
East Indies. 
