255 
The puparia of the two species can be distinguished at the 
first glance. The puparium of M. torguans (Fig. 3) is ovate or 
somewhat broader behind the middle, 
the surface is smooth and shining and 
the borders of the excavation of the 
last segment rounded; in M. anomala 
the shape is cylindrical, the surface not 
SØ Å Fig. 2. Mydæa anomala 
shining and the excavation of the last — Larva. 3. Stage. Posterior 
spiracles. 
segment much greater with sharp borders. 
The fly: Male. Head short, frons not prominent, eyes narrowly 
Separated; the ocellar tubercle dark; frons whitish or silvery grey, 
the cheeks of the same colour; the middle frontal triangle reddish 
brown. Epistoma and jowls pale brownish yellow. The lower frontal 
bristles rather long, the upper ones shorter. The jowls with short, 
yellow hair; 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 åre 
four dark or blackish 
stripes, the two median 
a little diverging back- 
Fig. 3, 4. Puparia of Mydæa torquans — wards and  abbreviated, 
and M. anomala. After the emergence 
of the flies. 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 
åre three humeral bristles, the innermost small and weak; only 
two acrostical bristles, one on each side in front of the scu- 
