255 
The puparia of the two species can be distinguished at the 
first glanee. The puparium of M. torquam (Fig. 3) is ovate or 
somewhat broader bellind the middle, 
the suiface is smooth and shining and 
the horders of the excavation of the 
last segment rounded; in M. anomala 
the shape is cylindrical, the surface not 
shmmg and the excavation of the last 
segment much greater with sharp horders. 
Fig. 2. Mydæa anomala 
Larva. 3. Stage. Posterior 
spiracles. 
The fly: Male. Head short, fronsnot prominent, eyes narrowly 
separated; the ocellar tubercle dark; frons whitish or silvery grey, 
the checks of the same colour; the middle frontal triangle reddish 
brown. Epistoma and jowls pale brownish yellow. The lower frontal 
bnstles rather long, the upper ones skorter. The jowls with short, 
yellow haii, the bristles at the oral aperture black, the vibrissa 
long and thick, more than twice as long as the other bristles. 
Antennæ reddish yellow, 
arista brownish or dark 
brown, long feathery, the 
base yellow. Palpi yellow. 
Thorax slate gray, with 
a slightly translucent 
brownish ground colour; 
on the disc there are 
four dark or blackish 
stripes, the two median 
a little diverging back- 
wards and abbreviated, 
the lateral interrupted at 
the transverse furrow and 
thus each forming two somewhat cuneiform spots. The humeral 
callus yellow. The disc uniformly covered with short hair. There 
are three humeral bristles, the innermost small and weak; only 
two acrostical bristles, one on each side in front of the scu- 
Pig. o, 4. Puparia of Mydæa torquans 
and M. anomala. Aftør the emergence 
of the flies. 
