330 INSEOTA SAUNDERSIANA. 
hoary stripes; the inner pair slender; breast hoary: abdomen cinereous, 
tessellated with black; tip pale gold-colour: legs black; thighs with a 
hoary covering? wings almost colourless ; borders of the veins tinged with 
brown : alule white: halteres yellow. Length of the body 43 lines; of 
the wings 9 lines. 
South America. 
Genus MUSCA, Zinn. 
The species here described will form the following groups :— 
a. Mouth slender .. eueneduensvse ataaGhpiscealespdesastarpaaceapiers lt SLOIOSVM 
b. Prebrachial vein “forming a very obtuse angle at its diecuie 
cuprea. 
bb. Prebrachial vein forming a yery gentle curve at its flexure. 
occidentis, concolor. 
aa. Mouth thick. 
b. Sixth feeler-joint feathered with short hairs, downy towards the tip. 
divisa. 
bb, Sixth feeler-joint feathered with long hairs. 
@, Dhirdafpelerjointisottissterssaussaetsrmvievsnederanecereuhecverars Calliphora. 
d, Prebrachial vein forming a hardly acute angle at its flexure. 
incerta. 
dd. Prebrachial vein forming a right angle at its flexure. 
aucta. 
ddd. Prebrachial vein forming a right but not sharply defined angle at 
its flexure. 
violacea, inducta. 
d ddd. Prebrachial vein forming a slightly obtuse angle at its flexure. 
suffusa. 
cc, Third feeler-joint rigid. 
d. Facialia without bristles. 
e Prebrachial vein forming a right angle at its flexure..... . Chrysomyia. 
turbida, fasciata. 
ee. Prebrachial vein forming an obtuse angle at its flexure. 
purpurea, polita. 
dd. Facialia bristly at the base. 
e. Prebrachial vein forming an angle at its flexure. 
