845 INSECTA SAUNDERSTANA, 
Musca Ex1rreMma, 
Cyaneo-viridis ; caput albidum ; antenne nigre ; pedes nigri, femoribus 
viridibus ; ale sublimpide. 
Green, more or less varied with blue: head with a slight whitish cover- 
ing; frontalia deep black, forked towards the hack of the head; epistoma 
prominent: mouth, palpi and feelers black ; third joint of the feelers more 
than twice the length of the second, reaching the epistoma: legs black ; 
thighs green: wings almost colourless ; veins black, tawny at the base; 
prebrachial vein forming a very shallow curve at its flexure, hardly inclined 
inward from thence to its tip; lower cross-vein almost straight; alule 
gray: halteres white. Length of the body 2} lines; of the wings 5 lines. 
Van Dieman’s Land. 
Mosca sripara. 
Nigra ; caput album, nigro bivittatum ; thorax flavo-albo quadrivittatus ; 
pectus canum ; abdomen aureo tessellatum, apice testaceum vittisque 
tribus nigris duabusque auratis ornatum ; ale sublimpide. 
Black : head with awhite covering ; crown with two broad black stripes ; 
epistoma slightly prominent: mouth, palpi and feelers black ; third joint of 
the feelers about thrice the length of the second, nearly reaching the epi- 
stoma; sixth pitchy: chest with four yellowish-white stripes, the side pait 
interrupted: hind chest and breast hoary: abdomen tessellated with pale 
gold-colour ; tip dark testaceous, with three slender black stripes between two 
broad pale gold stripes: legs black: wings almost colourless ; veins black, 
tawny at the base; prebrachial vein forming a very gentle curve at its 
flexure, very slightly curved inward near the tip; lower cross-vein curved 
inward before the middle: alule white: halteres tawny. Length of the 
body 3% lines ; of the wings 7 lines. 
Demerara. 
Mosca vicanrra, Fem. 
Cana ; caput awatum, antice et subtus album; thorax nigro quadrivit- 
tatus ; abdomen subcinereum, basi ferrugineum, segmentis 20 et 30 
trivittatis, 4o bivittato ; antenne picee ; pedes nigri ; ala subcineree. 
Black, with a hoary covering : head gilded above, white in front and 
beneath: frontalia black, broad, linear ; facialia without bristles; epistoma 
