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DIPTURA. 339 
pitchy; third joint not reaching the epistoma; fourth, fifth, and sith 
tawny : scutcheon and abdomen partly purple ; first segment of the abdomen 
blackish: second and third coppery purple along the hind borders: legs 
black: wings almost colourless ; veins black ; prebrachial vein forming a 
right angle, at its flexure, much bent inward from thence to its tip ; lower 
cross-vein with the two curves, the lower deeper than the upper which is 
very slight: alule white. Length of the body 3 lines; of the wings 6 
lines. 
Canary Islands. 
Musoa sicotor, Mas. 
Viridis ; abdomen cyaneo-purpureum ; antenne nigre ; pedes picei, tarsis 
nigris ; ale subcineree. 
Dark green, hairy: head with a white covering ; facialia ferru- 
ginous, beset with very short bristles towards the base; epistoma promi- 
nent: eyes hare: palpi pitchy: feelers black; third joint slightly decreas- 
ing in depth beneath towards the tip, not reaching the epistoma, about 
thrice the length of the second; sixth feathered with very long hairs: ab- 
domen bluish purple: legs pitchy ; feet black: wings slightly gray; pre- 
brachial vein forming a hardly obtuse angle at its flexure which emits a 
short branch, slightly curved inward near this, straight from thence to the 
tip; lower cros-vein with the two curves, the upper deeper than the lower: 
alule gray, with tawny borders: halteres tawny. Length of the body 34 
lines; of the wings 7 lines, 
Musca LEUCOCEPHALA. 
Cyaneo-viridis ; caput argenteum, antice et subtus fulvum ; abdomen pur- 
pureo varium ; antenne picee ; pedes nigri ; ale cinerea. 
Bright bluish green: head with a silvery white covering, tawny in front 
and beneath ; frontalia black, linear; epistoma not prominent: mouth, 
palpi and feelers pitchy ; third joint of the feelers linear, very long, reaching 
the epistoma, more than four times the length of the second joint; sixth 
joint black, tawny at the base: chest with a slight white covering: abdo- 
men partly purple: legs black; thighs blue towards the base: wings 
gray ; veins black; prebrachial vein forming a slightly obtuse angle at 
SS 
