DIPTERA. 418 
Genus OPOMYZA, Fallen.” 
OpomyzA LINEATA. 
Testacea, ferrugineo trivittatus ; antenne nigra, basi fulve ; abdomen 
sublineare, thorace longius ; ale sublimpide. 
Testaceous: crown with three ferruginous stripes: mouth pitehy : 
feelers black, tawny at the base; third joint oblong, more than twice the 
length of the second ; sixth slender, bare, more than twice the length of 
the third: chest with three ferruginous stripes: abdomen almost linear, 
longer than the chest: wings almost colourless; veins tawny; lower cross- 
vein almost straight, slightly oblique. Length of the body 14 line; of 
the wings 3 lines. 
Van Dieman’s Land. 
Genus GYMNOPA, Fallen. 
GYMNOPA NIGROZNEA. 
Enea ; antenne nigra ; abdomen cupreum ; pedes nigri; ale limpide. 
Brassy : feelers black: abdomen ecoppery, obconical, a little longer 
than the chest: legs black: wings colourless ; veins black, tawny at the 
base; lower cross-vein long, straight, oblique, remote from the border. 
Length of the body 1} line; of the wings 3 lines. 
United States. 
GYMNOPA TARSALIS. 
Nigro-enea; antenne fulve ; abdomen q@neo-viride ; pedes nigri, tibiis 
apice genubus tarsisque flavis ; ale subfulve. 
Brassy black: feelers tawny; third joint conical, about twice the 
length of the second; sixth black, slender, feathered with a few long hairs, 
more than twice the length of the third: abdomen brassy green, obconical, 
a litle longer than the chest: legs black: knees, feet, and tips of the __ 
3 H 
