346 INSECTA SAUNDERSIANA. 
Mosca onrysoretus, Mas. 
Purpurea; caput antice atrum; abdomen apice flavum, subtus flavo 
bivittatum ; antenna et pedes nigra ; tibia picee, postice ferruginee ; 
ale subfusce, apice et margine postico subcineree. 
Purple, with a slight white covering : head clothed with black hairs ; 
face deep black ; epistoma not prominent: mouth, palpi and feelers black ; 
third joint of the feelers more than twice the length of the second, ap- 
proaching the epistoma: tip of the abdomen bright yellow ; under side with 
two yellow stripes : legs black ; shanks pitchy ; hind shanks ferruginous : 
wings slightly brown, pale gray towards the tips and along the hind border ; 
veins black ; prebrachial vein forming a very gentle curve at its flexure, 
hardly curved inward from thence to the tip; lower cross-vein slightly 
undulating: alule gray: poisers pitchy. Length of the body 4 lines; of 
the wings 9 lines. 
Musca opscura, Mas. 
Viridi-cyanea ; caput argenteum ; thorax antice cano vittatus ; abdomen 
sublus flavo bivittatum ; antennae picee ; pedes nigri ; ale cinerea. 
Blue, more or less tinged with green: head with a silvery white cover- 
ing; sides of the face and epistoma pitchy; epistoma prominent : upper 
facets of the eyes large: mouth, palpi and feelers pitchy ; third joint of the 
feelers more than twice the length of the second, almost reaching the epi- 
stoma: fore part of the chest with a broad hoary stripe : under side of the 
abdomen with two yellow stripes on the disk : legs black: wings gray ; veins 
black; prebrachial vein forming a very gentle curve at its flexure, very 
slightly curved inward from thence to the tip; lower cross-vein almost 
straight: alulw and poisers white Length of the body 34 lines; of the 
wings 8 lines. 
Senegal? 
Musca DISTINGTA. 
Purpureo-cyanea ; abdomen sublus testaceum, nigro vittatum ; antenne 
picee ; pedes nigri; ale cineree. 
Purplish-blue, clothed with black hairs and bristles: fuce silvery white : 
facets in front of the eyes rather larger than those elsewhere: mouth and 
