. a si OE ae 
334 INSECTA SAUNDERSIANA. 
wings slightly gray; veins black, yellow at the base; prebrachial vein 
forming a very obtuse angle at its flexure, very slightly bent inward be- 
yond the middle: lower cross-vein slightly bent outward, straight near the 
base: alule white: halteres pale yellow. Length of the body 2} lines ; 
of the wings 6 lines. 
East Indies. 
Mosca INcERTA. 
Altra; thorax albo quadrivittatus, postice cyaneus ; abdomen cyaneum ; 
ale subcinerea, basi et ad costam obscuriores. 
Deep black : head covered with white pubescence ; frontalia deep black, 
linear; epistoma prominent: mouth pitchy; palpi black: feelers black ; 
third joint covered with hoary pubescence, slightly decreasing in depth. 
from the base to the tip, reaching the epistoma, more than four times the 
length of the second ; sixth joint feathered for half its length from the 
base: chest with four white stripes ; hind part blue : abdomen blue, partly 
green or purple: legs black: wings pale gray, a little darker at the base 
and alony part of the fore border; veins black ; prebrachial vein forming 
a hardly acute angle at its flexure, much curved inward and almost angular 
near this, nearly straight from thence to the tip; lower cross-vein with two 
curves, the upper one outward, much deeper than the lower one which is 
inward: alule dark gray, with white borders: halteres pitchy, Length of 
the body 44 lines; of the wings 9 lines. 
Columbia. 
Musca avcta. 
Cinereo-nigra ; caput canum; thorax nigro quinquevittatus; abdomen 
viridi-cyaneum ; antenne picee, basi ferruginee ; ale subcineree. 
Fem. Black, with a gray covering : head with a hoary covering ; fron- 
talia broad, black, slightly widening towards the feelers; facialia ferrugi- 
nous, beset with very short bristles along half the length from the base ; 
epistoma tawny, slightly prominent: palpi tawny: feelers pitchy ; first 
and second joints ferruginous ; third linear, rather deep, rounded at the tip, 
reaching the epistoma, more than four times the length of the second; 
sixth blaek, feathered along full two-thirds of the length, much longer 
